ch capacitor

52
CA08104001E For more information visit: www.EatonElectrical.com June 2006 Contents Power Factor Capacitors & Harmonic Filters 37.0-1 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 Sheet 1623 Power Factor Capacitors & Harmonic Filters Power Factor Capacitors & Harmonic Filters Capacitor Application Considerations Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0-2 NEC Code Requirements for Capacitors . . . . . . . . . . . . . . . . . . . . . . . 37.0-2 Capacitor Switching Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0-3 Installing Capacitors in a Plant Distribution System . . . . . . . . . . . . . 37.0-5 Locating Capacitors on Reduced Voltage and Multi-Speed Motor Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0-6 Harmonic Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0-7 Eliminating Harmonic Problems — Passive and Switched Harmonic Filters . . . . . . . . . . . . . . . . . . . . . . 37.0-8 Motor Power Factor Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.0-9 Capacitor Application Tables for Motors . . . . . . . . . . . . . . . . . . . . . . . 37.0-10 600 Volts ac and Below Fixed Low Voltage Capacitors and Filters Power Factor Correction Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . 37.1-1 Harmonic Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.1-1 UNIPAK Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.1-2 UNIPAK Low Voltage Fixed Capacitor Banks . . . . . . . . . . . . . . . . . . . 37.1-4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.1-5 UNIPAK Low Voltage Fixed Harmonic Filters . . . . . . . . . . . . . . . . . . . 37.1-6 UNIPUMP Power Factor Correction Capacitors . . . . . . . . . . . . . . . . . 37.1-7 Automatic Power Factor Correction Systems AUTOVAR 300 Wall-Mounted up to 300 kvar . . . . . . . . . . . . . . . . . . . 37.2-1 AUTOVAR 600 Floor-Mounted up to 1200 kvar . . . . . . . . . . . . . . . . . 37.2-2 AUTOVAR Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.2-3 AUTOVAR 300 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.2-4 AUTOVAR 600 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.2-5 AUTOVAR Switched Harmonic Filter Dimensions . . . . . . . . . . . . . . . 37.2-6 Active Harmonic Filter-Harmonic Correction Unit (480 V Max.) General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.3-1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.3-3 Transient-Free Static Switching Power Factor Correction Units — Low Voltage General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.4-1 Product Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.4-2 Metal-Enclosed — Medium Voltage UNIVAR Fixed PFC Unit General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.5-1 Layout Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.5-3 AUTOVAR Metal-Enclosed PFC System General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.6-1 Layout Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.6-8 Specifications For complete product specifications in CSI format, see Eaton’s Cutler-Hammer Product Specification Guide on enclosed CD-ROM: 1995 CSI Format: Fixed Power Factor Correction Equipment — LV(UNIVAR) . . . . . Section 16280A Switched Power Factor Correction Equipment — LV (AUTOVAR) . Section 16280B Switched Harmonic Filter Equipment — LV (AUTOVAR) . . . . . . . Section 16280C Switched Power Factor Correction — MV . . . . . . . . . . . . . . . . . . . Section 16280D Switched Capacitor & Harmonic Filter Equipment — MV (AUTOVAR) Section 16280E 2004 CSI Format: Fixed Power Factor Correction Equipment — LV(UNIVAR) . . . . . Section 26 35 33.11 Switched Power Factor Correction Equipment — LV (AUTOVAR) . Section 26 35 33.13 Switched Harmonic Filter Equipment — LV (AUTOVAR) . . . . . . . Section 26 35 26.15 Switched Power Factor Correction — MV . . . . . . . . . . . . . . . . . . . Section 26 35 33.17 Switched Capacitor & Harmonic Filter Equipment — MV (AUTOVAR) Section 26 35 33.19

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Page 1: CH Capacitor

CA08104001E For more information visit:

www.EatonElectrical.com

June 2006

Contents

Power Factor Capacitors & Harmonic Filters 37.0-1

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Sheet 1623

Po

we

r Facto

r C

ap

acit

ors

& H

arm

on

ic F

ilte

rs

Power Factor Capacitors & Harmonic Filters

Capacitor Application Considerations

Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.0-2

NEC Code Requirements for Capacitors . . . . . . . . . . . . . . . . . . . . . . .

37.0-2

Capacitor Switching Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.0-3

Installing Capacitors in a Plant Distribution System . . . . . . . . . . . . .

37.0-5

Locating Capacitors on Reduced Voltageand Multi-Speed Motor Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.0-6

Harmonic Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.0-7

Eliminating Harmonic Problems —Passive and Switched Harmonic Filters . . . . . . . . . . . . . . . . . . . . . .

37.0-8

Motor Power Factor Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.0-9

Capacitor Application Tables for Motors. . . . . . . . . . . . . . . . . . . . . . .

37.0-10

600 Volts ac and Below

Fixed Low Voltage Capacitors and Filters

Power Factor Correction Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . .

37.1-1

Harmonic Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.1-1

UNIPAK Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.1-2

UNIPAK Low Voltage Fixed Capacitor Banks . . . . . . . . . . . . . . . . . . .

37.1-4

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.1-5

UNIPAK Low Voltage Fixed Harmonic Filters . . . . . . . . . . . . . . . . . . .

37.1-6

UNIPUMP Power Factor Correction Capacitors . . . . . . . . . . . . . . . . .

37.1-7

Automatic Power Factor Correction Systems

AUTOVAR 300 Wall-Mounted up to 300 kvar . . . . . . . . . . . . . . . . . . .

37.2-1

AUTOVAR 600 Floor-Mounted up to 1200 kvar . . . . . . . . . . . . . . . . .

37.2-2

AUTOVAR Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.2-3

AUTOVAR 300 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.2-4

AUTOVAR 600 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.2-5

AUTOVAR Switched Harmonic Filter Dimensions . . . . . . . . . . . . . . .

37.2-6

Active Harmonic Filter-Harmonic Correction Unit (480 V Max.)

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.3-1

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.3-3

Transient-Free Static Switching Power Factor Correction Units — Low Voltage

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.4-1

Product Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.4-2

Metal-Enclosed — Medium Voltage

UNIVAR Fixed PFC Unit

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.5-1

Layout Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.5-3

AUTOVAR Metal-Enclosed PFC System

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.6-1

Layout Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37.6-8

Specifications

For complete product specifications in CSI format, see Eaton’s Cutler-Hammer Product Specification Guide on enclosed CD-ROM:1995 CSI Format: Fixed Power Factor Correction Equipment — LV(UNIVAR) . . . . .

Section 16280A

Switched Power Factor Correction Equipment — LV (AUTOVAR) .

Section 16280B

Switched Harmonic Filter Equipment — LV (AUTOVAR) . . . . . . .

Section 16280C

Switched Power Factor Correction — MV . . . . . . . . . . . . . . . . . . .

Section 16280D

Switched Capacitor & Harmonic Filter Equipment — MV (AUTOVAR)

Section 16280E

2004 CSI Format:Fixed Power Factor Correction Equipment — LV(UNIVAR) . . . . .

Section 26 35 33.11

Switched Power Factor Correction Equipment — LV (AUTOVAR) .

Section 26 35 33.13

Switched Harmonic Filter Equipment — LV (AUTOVAR) . . . . . . .

Section 26 35 26.15

Switched Power Factor Correction — MV . . . . . . . . . . . . . . . . . . .

Section 26 35 33.17

Switched Capacitor & Harmonic Filter Equipment — MV (AUTOVAR)

Section 26 35 33.19

Page 2: CH Capacitor

37.0-2

For more information visit:

www.EatonElectrical.com

CA08104001E

June 2006

Power Factor Capacitors & Harmonic Filters

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Application Considerations

Capacitors

Sheet 1624

Capacitor Selection

There are two basic types of capacitor installations: individual capacitors on linear or sinusoidal loads, and banks of fixed or automatically switched capacitors at the feeder or substation.

Individual vs. Banked Installations

Advantages of individual capacitors at the load:

Complete control. Capacitors cannot cause problems on the line during light load conditions.

No need for separate switching. Motor always operates with capacitor.

Improved motor performance due to more efficient power utilization and reduced voltage drops.

Motors and capacitors can be easily relocated together.

Easier to select the right capacitor for the load.

Reduced line losses.

Increased system capacity.

Advantages of bank installations at the feeder or substation:

Lower cost per kvar.

Total plant power factor improved — reduces or eliminates all forms of kvar charges.

Automatic switching ensures exact amount of power factor correction, eliminates overcapacitance and resulting overvoltages.

Table 37.0-1. Summary of Advantages/Disadvantages of Individual, Fixed Banks, Automatic Banks, Combination

Selection Criteria

The selection of the type of capacitor installation will depend on advantages and disadvantages of each type and several plant variables, including load type, load size, load constancy, load capacity, motor starting methods and manner of utility billing.

Load Type

If a facility has many large motors, 50 hp and above, it is usually economical to install one capacitor per motor and switch the capacitor and motor together. If there are many small motors, 1/2 to 25 hp, motors can be grouped with one capacitor at a central point in the distribution system. Often, the best solution for plants with large and small motors is to use both types of capacitor installations.

Load Size

Facilities with large loads benefit from a combination of individual load, group load and banks of fixed and automatically-switched capacitor units. A small facility, on the other hand, may require only one capacitor at the control board.

Sometimes, only an isolated trouble spot requires power factor correction in applications such as welding machines, induction heaters or dc drives. If a particular feeder serving a low power factor load is corrected, it may raise overall plant power factor enough that additional capacitors are unnecessary.

Load Constancy

If a facility operates around-the-clock and has a constant load demand, fixed capacitors offer the greatest economy. If load is determined by eight-hour shifts five days a week, utilize switched units to decrease capacitance during times of reduced load.

Method Advantages Disadvantages

IndividualCapacitors

Most technically efficient, most flexible Higher installation and maintenance cost

Fixed Bank Most economical, fewer installations Less flexible, requires switches and/or circuit breakers

AutomaticBank

Best for variable loads, prevents overvoltages, low installation cost

Higher equipment cost

Combination Most practical for larger numbers of motors

Least flexible

Load Capacity

If feeders or transformers are over-loaded, or to add additional load to already loaded lines, correction must be applied at the load. If a facility has surplus amperage, capacitor banks can be installed at main feeders. If load varies a great deal, automatic switching is probably the answer.

Utility Billing

The severity of the local electric utility tariff for power factor will affect payback and ROI. In many areas, an optimally designed power factor correction system will pay for itself in less than two years.

National Electric Code Requirements for Capacitors

Nameplate kvar

: Tolerance +15, -0%.

Discharge Resistors

: Capacitors rated at 600 volts and less must reduce the charge to less than 50 volts within 1 minute of de-energization. Capacitors rated above 600 volts must reduce the charge within 5 minutes.

Continuous Operation

: Up to 135% rated (nameplate) kvar, including the effects of 110% rated voltage (121% kvar), 15% capacitance tolerance and harmonic voltages over the fundamental frequency (60 Hz).

Dielectric Strength Test:

Twice the rated ac voltage (or a dc voltage 4.3 times the ac rating for non-metallized systems).

Overcurrent Protection

: Fusing between 1.65 and 2.5 times rated current to protect case from rupture. Does not preclude NEC

requirement for overcurrent protection in all three ungrounded conductors.

Note:

When capacitor is connected to the load side of the motor overcurrent protection, fused disconnects or breaker protection is not required. Fuses are recom-mended for all other indoor applications.

Page 3: CH Capacitor

CA08104001E For more information visit:

www.EatonElectrical.com

37.0-3

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Application Considerations

Switching Devices

Sheet 1625

Capacitor Switching Devices

Medium Voltage Capacitor Switching

Capacitance switching constitutes severe operating duty for a circuit breaker. At the time the breaker opens at near current zero the capacitor is fully charged. After interruption, when the alternating voltage on the source side of the breaker reaches its opposite maximum, the voltage that appears across the contacts of the open breaker is at least twice the normal peak line-to-neutral voltage of the circuit. If a breakdown occurs across the open contact the arc is re-established. Due to the circuit constants on the supply side of the breaker, the voltage across the open contact can reach three times the normal line-to-neutral voltage. After it is interrupted and with subse-quent alternation of the supply side voltage, the voltage across the open contact is even higher.

ANSI Standard C37.06 (indoor oilless circuit breakers) indicates the preferred ratings of Eaton’s Cutler-Hammer

Type VCP-W vacuum breaker. For capacitor switching careful attention should be paid to the notes accompa-nying the table. The definition of the terms are in ANSI Standard C37.04 Article 5.13 (for the latest edition). The application guide ANSI/IEEE Standard C37.012 covers the method of calculation of the quantities covered by C37.06 Standard.

Note that the definitions in C37.04 make the switching of two capacitors banks in close proximity to the switch-gear bus a back-to-back mode of switching. This classification requires a definite purpose circuit breaker (breakers specifically designed for capacitance switching).

We recommend that such application be referred to Eaton.

A breaker specified for capacitor switching should include as applicable:

1. Rated maximum voltage.

2. Rated frequency.

3. Rated open wire line charging switching current.

4. Rated isolated cable charging and shunt capacitor switching current.

5. Rated back-to-back cable charging and back-to-back capacitor switch-ing current.

6. Rated transient overvoltage factor.

7. Rated transient inrush current and its frequency.

8. Rated interrupting time.

9. Rated capacitive current switching life.

10. Grounding of system and capacitor bank.

Loadbreak interrupter switches

are permitted by ANSI/IEEE Standard C37.30 to switch capacitance but they must have tested ratings for the purpose. Refer to Cutler-Hammer Type MVS ratings.

Low Voltage Capacitor Switching

Circuit breakers and switches for use with a capacitor must have a current rating in excess of rated capacitor current to provide for overcurrent from overvoltages at fundamental frequency and harmonic currents. The following percent of the capacitor-rated current should be used as a general guideline:

Fused and unfused switches . . . . . . . . . . . . . . . . . . . 165%

Molded case breaker or equivalent . . . . . . . . . . . . . . . . . 150%

DS

II

power circuit breakers . . . . 135%

Magnum DS power circuit breaker . . . . . . . . . . . . . . 135%

Contactors:Open type. . . . . . . . . . . . . . . . . . . 135%

Enclosed type. . . . . . . . . . . . . . . . 150%

The NEC, Section 460-8(c)(4), requires the disconnecting means to be rated not less than 135% of the rated capacitor current (for 600 V and below). See

Page 37.0-4

for more information on

Low Voltage Capacitor Switching Devices.

Projects which anticipate requiring capacitor bank switching or fault interrupting should identify the breakers that must have capacitive current switching ratings on the equip-ment schedules and contract drawings used for the project. Manufacturer’s standard medium voltage breakers meeting ANSI C37.xx are not all rated for switching capacitive loads. Special breakers are usually available from vendors to comply with the ANSI C37.012 (Application Guide for Capacitor Current Switching) and other applicable ANSI standards. The use of capacitive current rated breakers can affect the medium voltage switchgear layout, thus early identification of these capacitive loads are critical to the design process.

For example, the standard 15 kV Eaton 150 VCP-W 500, 1200 ampere vacuum breaker does not have a capacitive current switching rating, however the 15 kV Eaton 150 VCP-W 25C, 1200 ampere vacuum breaker does have the following general purpose ratings:

25 ampere rms cable charging current switching.

Isolated shunt capacitor bank switching current ratings of 25 to 600 amperes.

Definite purpose back-to-back capacitor switch ratings required when two banks of capacitors are independently switched from the 15 kV switchgear bus.

The special breakers with these capacitive current ratings do not have UL labels, thus UL assembly ratings are not available.

Contact Eaton for more details on vacuum breaker and fused load interrupter switch products with capacitive switching current ratings at medium voltages.

Page 4: CH Capacitor

37.0-4

For more information visit:

www.EatonElectrical.com

CA08104001E

June 2006

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Application Considerations

Switching Devices

Sheet 1626

Table 37.0-2. Recommended Switching Devices

Table 37.0-2. (Continued)

Switching device ratings are based on percentage of capacitor-rated current as indicated (above). The interrupting rating of the switch must be selected to match the system fault current available at the point of capacitor application. Whenever a capacitor bank is purchased with less than the ultimate kvar capacity of the rack or enclosure, the switch rating should be selected based on the ultimate kvar capacity — not the initial installed capacity.

Capacitor Rating Amperes

kvar CapacitorRatedCurrent

SafetySwitchFuse Rating

MoldedCase BreakerTrip Rating

PowerBreakerTrip Rating

240 Volts

2.5 5 7.5

6.0 12.0 18.0

15 20 30

15 20 30

15 20 30

10 15 20

24.1 36.1 48.1

40 60 80

40 70 90

40 50 70

25 30 45

60 72.2108

100 125 200

100 125 175

90 100 150

50 60 75

120144180

200 250 300

200 225 275

175 200 250

90100120

217240289

400 400 500

350 400 500

300 350 400

125135150

301325361

500 600 600

500 500 600

450 500 500

180200225

433480541

800 800 900

700 800 900

600 700 800

240250270

578602650

100010001200

900 9001000

800 9001000

300360375

720866903

120016001500

———

120012001200

480 Volts

2 5 7.5

2.41 6.01 9.0

15 15 15

15 15 15

15 15 15

10 15 20

12.0 18.0 24.0

20 30 40

20 30 40

20 30 40

25 30 35

30.0 36.1 42

50 60 70

50 70 70

50 50 60

40 45 50

48.1 54 60.1

80 90 100

100 100 100

70 80 90

60 75 80

72.2 90.2 96.2

125 150 175

125 150 150

100 125 150

90100120

108120144

200 200 250

175 200 225

150 175 200

125150160

150180192

250 300 350

225 300 300

200 250 300

180200225

216241271

400 400 500

350 400 500

300 350 400

240250300

289301361

500 500 600

500 500 600

400 400 500

320360375

385433451

700 800 800

600 700 700

600 600 600

400450

481541

800 900

800 900

800 800

Capacitor Rating Amperes

kvar CapacitorRatedCurrent

SafetySwitchFuse Rating

MoldedCase BreakerTrip Rating

PowerBreakerTrip Rating

600 Volts

5 7.5 10

4.8 7.2 9.6

15 15 20

15 15 15

15 15 15

15 20 25

14.4 19.2 24.1

25 35 40

30 30 40

20 30 40

30 35 40

28.9 33.6 38.5

50 60 70

50 50 70

40 50 70

45 50 60

43.3 48.1 57.8

80 80100

70100100

70 70 90

75 80100

72.2 77.0 96.2

125150175

125125150

100125150

120125150

115120144

200200250

175200225

175175200

160180200

154173192

300300350

250300300

225250300

225240250

217231241

400400400

350350400

300350350

300320360

289306347

500600600

500500600

400500500

375400450

361385433

600700800

600600700

500600600

Page 5: CH Capacitor

CA08104001E For more information visit:

www.EatonElectrical.com

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Application Considerations

Capacitor Installation

Sheet 1627

Installing Capacitors in aPlant Distribution System

At the Load

Since capacitors act as kvar genera-tors, the most efficient place to install them is directly at the motor, where kvar is consumed. Three options exist for installing capacitors at the motor. Use

Figures 37.0-1

37.0-7

, and the information below to determine which option is best for each motor.

Location A — Motor Side of Overload Relay

New motor installations in which overloads can be sized in accor-dance with reduced current draw.

Existing motors when no overload change is required.

Location B — Line Side of Overload Relay

Existing motors when overload rat-ing surpasses code (see Appendix for NEC code requirements).

Location C — Line Side of Starter

Motors that are jogged, plugged, reversed.

Multi-speed motors.

Starters with open transition and starters that disconnect/reconnect capacitor during cycle.

Motors that start frequently.

Motor loads with high inertia, where disconnecting the motor with the capacitor can turn the motor into a self-excited generator.

At the Service Feeder

When correcting entire plant loads, capacitor banks can be installed at the service entrance, if load conditions and transformer size permits. If the amount of correction is too large, some capacitors can be installed at individual motors or branch circuits.

When capacitors are connected to the bus, feeder, motor control center or switchboard, a disconnect and over-current protection must be provided.

Figure 37.0-2. Installing Capacitors Online

Refer to

Pages 37.0-3

and

37.0-13

for switching device considerations and conductor sizing.

Locating Capacitors on Motor Circuits

Figure 37.0-1. Locating Capacitors on Motor Circuits

Main Busor Feeder

Fused Switch or Circuit Breaker �

CapacitorBank

Motor

MotorFeed

MotorStarter

Fused SafetySwitch or Breaker

Install atLocation:

CapacitorC

CapacitorB

CapacitorA

Thermal OverloadB AC

Page 6: CH Capacitor

37.0-6

For more information visit:

www.EatonElectrical.com

CA08104001E

June 2006

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Locating Capacitors

Sheet 1628

Locating Capacitors on Reduced Voltage and Multi-Speed Motors

Figure 37.0-3. Autotransformer — Closed TransitionNote: Connect capacitor on motor side of starting contacts (2, 3, 4) at points A – B – C.

Figure 37.0-4. Series Resistance StartingNote: Connect capacitor on motor side of starting contactor (1, 2, 3) at points A – B – C.

Figure 37.0-5. Part-Winding StartingNote: Connect capacitor on motor side of starting contacts (1, 2, 3) at points A – B – C.

Figure 37.0-6. Wye-Delta StartingNote: Connect capacitor on motor side of starting contacts (1, 2, 3) at points A – B – C.

Figure 37.0-7. Reactor StartingNote: Connect capacitor on motor side of starting contactor (1, 2, 3) at points A – B – C.

MotorStator

5

4

3

2

1

C

B

A

6

7Line

Start: Close 6-7-2-3-4Transfer: Open 6-7Run: Close 1-5

MotorStator

1

2

3 A

B

6 9

5 8

4 7

Line

Start: Close 1-2-3Second Step: Open 4-5-6Third Step: Close 7-8-9

C

MotorStatorStart: Close 1-2-3

Run: Close 4-5-6

A

B

C2

1

3Line

6

5

4

1

2

Line

Wye Start: Close 1-2-3-7-8Delta Run: Close 1-2-3-4-5-6

4

B 5

A

7

8

63

C

MotorStator

MotorStator

A

Line

3

B2

C1

6

5

4

Start: Close 1-2-3Run: Close 4-5-6

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Harmonic Considerations

Sheet 1629

Harmonic Considerations

A discussion of power system harmonics is incomplete without discussing the effects of power factor correction capacitors. In an industrial plant containing power factor correction capacitors, harmonic currents and voltages can be magnified considerably due to the interaction of the capacitors with the service transformer. This is referred to as

harmonic resonance or parallel resonance

. For a typical plant containing power factor correction capacitors, the res-onant frequency (frequency at which amplification occurs) normally falls in the vicinity of the 5th to the 13th harmonic. Since non-linear loads typically inject currents at the 5th, 7th, 11th and 13th harmonics, a resonant or near-resonant condition will often result if drives and capacitors are installed on the same system, producing the symptoms and problems outlined in the previous section.

Note:

Capacitors themselves do not cause harmonics, but only aggravate potential harmonic problems. Often, harmonic-related problems do not “show up” until capacitors are applied for power factor correction.

It is a common misconception that the problem of applying capacitors in harmonic environments is limited to problems caused for the capacitor itself — that the capacitor’s lower impedance at higher frequencies causes a current overload into the capacitor and, therefore, must be removed. How-ever, the capacitor/harmonics problem must be viewed from a power system standpoint. The capacitor-induced increase of harmonic voltages and currents on a plant’s system may be causing problems while the capacitor itself remains within its acceptable current rating.

Capacitor Banks and Transformers Can Cause Resonance

Capacitors and transformers can create dangerous reso-nance conditions when capacitor banks are installed at the service entrance. Under these conditions, harmonics pro-duced by non-linear devices can be amplified many fold.

Problematic amplification of harmonics becomes more likely as more kvar is added to a system which contains a significant amount of non-linear load.

An estimate of the resonant harmonic frequency is found by using the following formula:

If h is near the values of the major harmonics generated by a non-linear device — i.e., 3, 5, 7, 11 — then the resonance circuit will greatly increase harmonic distortion.

For example, if a plant has a 1,500 kVA transformer with a 5-1/2% impedance and the short-circuit rating of the utility is 48,000 kVA, then kVA

sys

would equal 17,391 kVA.

If 350 kvar of capacitors were used to improve power factor, h would be:

Because h falls right on the 7th harmonic, these capacitors could create a harmful resonance condition if non-linear devices were present in the factory. In this case the capacitors should be applied only as harmonic filtering assemblies.

Diagnosing a Potential Harmonics Related Problem

Negative symptoms of harmonics on plant equipment include blown fuses on capacitors, reduced motor life, false or spurious operations of fuses or circuit breakers, decreased life or increased noise in transformers or mis-operation of electronic or microprocessor controls. If one or more of these symptoms occurs with regularity, then the following steps should be taken.

1. If the plant contains power factor correction capacitors, the current into the capacitors should be measured using a ‘true rms’ current meter. If this value is higher than the capacitor’s rated current at the system voltage (by >5% or so), the presence of harmonic voltage distortion is likely.

2. Conduct a paper audit of the plant’s harmonic-producing loads and system configuration. This analysis starts with the gathering of kVA or horsepower data on all the major non-linear devices in the plant, all capacitors, and rating information on service entrance transformer(s). This data is analyzed to determine whether the conditions are present to create unfavorable levels of harmonics.

3. If the electrical distribution system is complex — e.g., multiple service entrances, distributed capacitors — or if the paper audit is incomplete or considered to be too burdensome, the most definitive way to determine whether harmonics are causing a problem is through an on-site plant audit. This audit involves an inspection of the electrical system layout and connected loads, as well as harmonic measurements taken at strategic locations. This data can then be assembled and analyzed to obtain a clear and concise understanding of the power system.

hkVAsys

kvar------------------=

kVAsys Short Circuit Capacity of the System=

h The Harmonic Number referred to a 60 Hz Base=kvar Amount of Capacitor kvar on the Line=

h 17,391350

------------------ 49.7 7.0= = =

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Sheet 1630

Eliminating HarmonicProblemsWhen power factor correction is required in the presence of non-linear loads, or the amount of harmonic distortion must be reduced to solve power quality problems or avoid penalties, the most reliable, lowest cost solution is often realized with the use of harmonic filters.

Passive and Switched Harmonic FiltersA shunt harmonic filter (see Figure 37.0-8) is, essentially, a power factor correction capacitor combined with a series iron core reactor. A filter provides power factor correction at the fundamental frequency and becomes an inductance (like a motor) at frequencies higher than its “tuning point.” Most harmonic filters are tuned below the 5th harmonic. Therefore, the filter provides an inductive impedance path to those currents at harmonic frequencies created by nearly all three-phase non-linear loads (5th, 7th, 11th, 13th, etc.). Since the filter is not capacitive at these frequencies, the plant electrical system can no longer resonate at these frequencies and can not magnify the harmonic voltages and currents.

A shunt harmonic filter therefore accomplishes three things:

1. Provides power factor correction.

2. Prevents harmonic overvoltages due to resonance.

3. Reduces voltage harmonic distor-tion and transformer harmonic loading at frequencies above its tuning point.

In some circumstances, a harmonic resonance condition may accrue gradually over time as capacitors and non-linear loads are installed in a plant. The replacement of such capaci-tors with harmonic filters in order to correct a problem may be prohibitively expensive. Custom-designed harmonic filters which are able to eliminate problems associated with resonance at any particular frequency while providing an extremely low amount of power factor correction capacitance. These low kvar filters are therefore able to provide the same amount of filtering capacity as a much larger conventional filter, but at a lower cost.

If the plant loads vary widely then a switched capacitor/filter bank is recommended.

Figure 37.0-8. Shunt Harmonic Filter

PhaseABC

Reactor

CapacitorBank

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Application ConsiderationsMotor Power Factor Correction

Sheet 1631

Motor Power Factor CorrectionTables 37.0-3 and 37.0-4 contain sug-gested maximum capacitor ratings for induction motors switched with the capacitor. The data is general in nature and representative of general purpose induction motors of standard design. The preferable means to select capacitor ratings is based on the “maximum recommended kvar” information available from the motor manufacturer. If this is not possible or feasible, the tables can be used.

An important point to remember is that if the capacitor used with the motor is too large, self-excitation may cause a motor-damaging overvoltage when the motor and capacitor combi-nation is disconnected from the line. In addition, high transient torques capable of damaging the motor shaft or coupling can occur if the motor is reconnected to the line while rotating and still generating a voltage of self-excitation.

Definitionskvar — rating of the capacitor in reactive kilovolt-amperes. This value is approximately equal to the motor no-load magnetizing kilovars.

% AR — percent reduction in line current due to the capacitor. A capacitor located on the motor side of the overload relay reduces line current through the relay. Therefore, a different overload relay and/or setting may be necessary. The reduc-tion in line current may be determined by measuring line current with and without the capacitor or by calculation as follows:

If a capacitor is used with a lower kvar rating than listed in tables, the % AR can be calculated as follows:

The tables can also be used for other motor ratings as follows:

A. For standard 60 Hz motors operating at 50 Hz:

kvar = 1.7 – 1.4 of kvar listed% AR= 1.8 – 1.35 of % AR listed

B. For standard 50 Hz motors operating at 50 Hz:

kvar = 1.4 – 1.1 of kvar listed% AR= 1.4 – 1.05 of % AR listed

C. For standard 60 Hz wound-rotor motors:

kvar = 1.1 of kvar listed% AR= 1.05 of % AR listed

Note: For A, B, C, the larger multipliers apply for motors of higher speeds; i.e., 3600 rpm = 1.7 mult., 1800 rpm = 1.65 mult., etc.

To derate a capacitor used on a system voltage lower than the capacitor volt-age rating, such as a 240-volt capacitor used on a 208-volt system, use the following formula:

For the kVAC required to correct the power factor from a given value of COS φ1 to COS φ2, the formula is:

kVAC = KW (tan phase1 – tan phase2)

Capacitors cause a voltage rise. At light load periods the capacitive voltage rise can raise the voltage at the location of the capacitors to an unacceptable level. This voltage rise can be calculated approximately by the formula

MVAR is the capacitor rating and MVASC is the system short circuit capacity.

With the introduction of variable speed drives and other harmonic current generating loads, the capacitor imped-ance value determined must not be resonant with the inductive reactances of the system. This matter is discussed further under the heading “Harmonics and Non-Linear Loads.”

% AR 100 100 (Original PF)(Improved PF)−−−−−−−−−−−−−−−−−−−−−−−−×–=

% AR Listed % AR Actual kvarkvar in Table−−−−−−−−−−−−−−−−−−−−−−×=

Actual kvar =

Nameplate kvar Applied Voltage( )2

Nameplate Voltage( )2-------------------------------------------------------×

% VRMVAr

MVASC−−−−−−−−−−−−=

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Application ConsiderationsApplication Considerations — Motors

Sheet 1632

Table 37.0-3. Suggested Maximum Capacitor Ratings

� For use with 3-phase, 60 Hz NEMA Classification B Motors to raise full load power factor to approximately 95%.

InductionMotor hp Rating

Number of Poles and Nominal Motor Speed in RPM

2 — 3600 RPM 4 — 1800 RPM 6 — 1200 RPM 8 — 900 RPM 10 — 720 RPM 12 — 600 RPM

Capacitorkvar

CurrentReduction %

Capacitorkvar

CurrentReduction %

Capacitorkvar

CurrentReduction %

Capacitorkvar

CurrentReduction %

Capacitorkvar

CurrentReduction %

Capacitorkvar

CurrentReduction %

Used for High Efficiency Motors and Older Design (Pre “T-Frame”) Motors �

3 5 7.5

1.5 2 2.5

141211

1.5 2 2.5

151312

1.5 2 3

201715

2 3 4

272522

2.5 4 5

353230

3 4 6

413734

10 15 20

3 4 5

10 9 9

3 4 5

111010

3 5 6

141312

5 6 7.5

211816

6 8 9

272321

7.5 9 12.5

312725

25 30 40

6 7 9

9 8 8

6 7 9

10 9 9

7.5 910

111110

9 10 12.5

151413

10 12.5 15

201816

15 17.5 20

232220

50 60 75

12.51517.5

8 8 8

101517.5

9 8 8

12.51517.5

101010

15 17.5 20

121110

20 22.5 25

151514

25 27.5 35

191918

100125150

22.527.530

8 8 8

202530

8 8 8

253035

9 9 9

27.5 30 37.5

101010

35 40 50

131312

40 50 50

171615

200250300

405060

8 8 8

37.54550

8 7 7

405060

9 8 8

50 60 60

10 9 9

60 70 80

121111

60 75 90

141312

350400450500

60757575

8 8 8 8

60607575

7 6 6 6

75758085

8 8 8 8

75 85 90100

9 9 9 9

90 95100100

1010 9 9

95100110120

11111110

T-Frame NEMA� “Design B” Motors �

2 3 5

1 1.5 2

141414

1 1.5 2.5

242322

1.5 2 3

302826

2 3 4

423831

2 3 4

404040

3 4 5

504949

7.5 10 15

2.5 4 5

141412

3 4 5

201818

4 5 6

212120

5 6 7.5

282724

5 7.5 8

383632

6 8 10

453834

20 25 30

6 7.5 8

121211

6 7.5 8

171716

7.5 8 10

191919

9 10 15

232322

10 12.5 15

292524

12.5 17.5 20

303030

40 50 60

12.5 15 17.5

121212

15 17.5 20

161515

15 20 22.5

191917

17.5 22.5 25

212120

20 22.5 30

242422

25 30 35

303028

75100125

20 22.5 25

121110

25 30 35

141412

25 30 35

151212

30 35 40

171614

35 40 45

211515

40 45 50

191717

150200250

30 35 40

101011

40 50 60

121110

40 50 60

121110

50 70 80

141413

50 70 90

131313

60 90100

171717

300350400

45 50 75

111210

70 75 80

10 8 8

75 90100

121212

100120130

141313

100120140

131313

120135150

171515

450500

80100

8 8

90120

8 9

120150

1012

140160

1212

160180

1413

160180

1515

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Sheet 1633

Table 37.0-4. Suggested Capacitor Ratings, in kvars, for NEMA Design C, D and Wound-Rotor Motors

Note: Applies to three-phase, 60 Hz motors when switched with capacitors as single unit.Note: Use motor manufacturer’s recommended kvar as published in the performance data sheets for specific motor types:drip-proof, TEFC, severe duty, high efficiency and NEMA design.

Table 37.0-5. 2400 Volts and 4160 Volt Motors NEMA Design B

Table 37.0-6. NEMA Design B and C 2300 and 4000 Volt Motors (after 1956)

Induction Motor Rating (hp)

Design C Motor Design D Motor1200 r/Minimum

Wound-RotorMotor1800 and 1200 r/Minimum 900 r/Minimum

15 20 25

5 5 6

5 6 6

5 6 6

5.5 7 7

30 40 50

7.51012

91215

101215

111317.5

60 75100

17.51927

1822.527

1822.530

202533

125150200

3537.545

37.54560

37.54560

405065

250300

5465

7090

7075

7585

Nominal Motor Speed in RPM and Number of Poles

InductionMotorRating (hp)

3600 RPM 2 1800 RPM 4 1200RPM 6 900 RPM 8 720 RPM 10 600 RPM 12

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

100 120 150 200

25 25 25 50

8777

25 25 25 50

10 9 8 8

25 25 25 50

1110 9 9

25 25 25 50

1110 9 9

25 25 25 50

12111110

25 50 50 75

16151414

250 300 350 400

50 50 50 75

7766

50 50 50 75

7 7 6 6

50 75 75 75

8 8 8 7

75 75 75100

9 9 9 9

75 75 75100

10 9 9 9

75100100100

14131211

450 500 600 700

75 75 75100

6555

75 75100100

6 6 6 6

75100100125

6 6 6 6

100125125150

9 9 8 8

100125150150

9 9 9 8

125125150150

10 9 9 8

800 90010001250

100125150200

5555

150150200200

6 6 6 6

150200250250

6 6 5 5

150200250300

7 7 6 6

200250250300

8 8 7 6

200250250300

8 8 7 6

Nominal Motor Speed in RPM and No. of Poles

InductionMotorRating (hp)

3600 RPM 2 1800 RPM 4 1200 RPM 6 900 RPM 8 720 RPM 10 600 RPM 12

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

kvar CurrentReduction %

NEMA Design B 2300 and 4000 Volt Motors (after 1956) 100 120 150 200 250

25 25 25 25 30

77777

25 25 25 25 30

10 9 8 6 5

25 25 25 50 50

1110 8 8 8

25 25 25 50 50

1110 9 9 9

25 25 50 50 75

1211111010

25 50 50 75100

1715151414

300 350 400 450 500

50 50 50 75 75

76555

50 50 50 50 75

5 5 5 5 5

75 75 75 75100

8 8 6 6 6

75 75100100125

9 9 9 8 8

75 75100100125

9 9 9 8 8

100100100100125

121110 8 8

600 700 800 90010001250

75100100125150200

555555

100100125150200200

5 5 5 5 5 5

100100125200250250

5 5 5 5 5 5

125125150200250300

7 7 7 6 6 6

125150150250250300

8 8 8 7 7 6

125150150250250300

8 8 8 7 7 6

NEMA Design C 2300 and 4000 Volt Motors (after 1956) 100 125 150 200 250

—————

—————

2525255050

1111 9 9 8

25 25 25 50 50

1111 9 9 9

25 25 50 50 50

1111 9 9 9

25 25———

1111———

—————

—————

300 350

——

——

5050

6 6

75 75

9 8

75 75

9 9

——

——

——

——

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Sheet 1634

Table 37.0-7. Multipliers to Determine Capacitor Kilovars Required for Power Factor Correction

Note: To obtain required capacitor kvar:1. Get PF correction factor from Table 37.0-7 above.2. Required capacitor kvar = kW load x factor.

OriginalPowerFactor

Corrected Power Factor

0.80 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.0

0.500.510.520.530.54

0.9820.9370.8930.8500.809

1.0080.9620.9190.8760.835

1.0340.9890.9450.9020.861

1.0601.0150.9710.9280.887

1.0861.0410.9970.9540.913

1.1121.0671.0230.9800.939

1.1391.0941.0501.0070.966

1.1651.1201.0761.0330.992

1.1921.1471.1031.0601.019

1.2201.1751.1311.0881.047

1.2481.2031.1591.1161.075

1.2761.2311.1871.1441.103

1.3061.2611.2171.1741.133

1.3371.2921.2481.2051.164

1.3691.3241.2801.2371.196

1.4031.3581.3141.2711.230

1.4401.3951.3511.3081.267

1.4811.4361.3921.3491.308

1.5291.4841.4401.3971.356

1.5891.5441.5001.4571.416

1.7321.6871.6431.6001.559

0.550.560.570.580.59

0.7690.7300.6920.6550.619

0.7950.7560.7180.6810.645

0.8210.7820.7440.7070.671

0.8470.8080.7700.7330.697

0.8730.8340.7960.7590.723

0.8990.8600.8220.7850.749

0.9260.8870.8490.8120.776

0.9520.9130.8750.8380.802

0.9790.9400.9020.8650.829

1.0070.9680.9300.8930.857

1.0350.9960.9580.9210.885

1.0631.0240.9860.9490.913

1.0931.0541.0160.9790.943

1.1241.0851.0471.0100.974

1.1561.1171.0791.0421.006

1.1901.1511.1131.0761.040

1.2271.1881.1501.1131.077

1.2681.2291.1911.1541.118

1.3161.2771.2391.2021.166

1.3761.3371.2991.2621.226

1.5191.4801.4421.4051.369

0.600.610.620.630.64

0.5830.5490.5160.4830.451

0.6090.5750.5420.5090.474

0.6350.6010.5680.5350.503

0.6610.6270.5940.5610.529

0.6870.6530.6200.5870.555

0.7130.6790.6460.6130.581

0.7400.7060.6730.6400.608

0.7660.7320.6990.6660.634

0.7930.7590.7260.6930.661

0.8210.7870.7540.7210.689

0.8490.8150.7820.7490.717

0.8770.8430.8100.7770.745

0.9070.8730.8400.8070.775

0.9380.9040.8710.8380.806

0.9700.9360.9030.8700.838

1.0040.9700.9370.9040.872

1.0411.0070.9740.9410.909

1.0821.0481.0150.9820.950

1.1301.0961.0631.0300.998

1.1901.1561.1231.0901.068

1.3331.2991.2661.2331.201

0.650.660.670.680.69

0.4190.3880.3580.3280.299

0.4450.4140.3840.3540.325

0.4710.4400.4100.3800.351

0.4970.4660.4360.4060.377

0.5230.4920.4620.4320.403

0.5490.5180.4880.4580.429

0.5760.5450.5150.4850.456

0.6020.5710.5410.5110.482

0.6290.5980.5680.5380.509

0.6570.6260.5960.5660.537

0.6850.6540.6240.5940.565

0.7130.6820.6520.6220.593

0.7430.7120.6820.6520.623

0.7740.7430.7130.6830.654

0.8060.7750.7450.7150.686

0.8400.8090.7790.7490.720

0.8770.8460.8160.7860.757

0.9180.8870.8570.8270.798

0.9660.9350.9050.8750.846

1.0260.9950.9650.9350.906

1.1691.1381.1081.0781.049

0.700.710.720.730.74

0.2700.2420.2140.1860.159

0.2960.2680.2400.2120.185

0.3220.2940.2660.2380.211

0.3480.3200.2920.2640.237

0.3740.3460.3180.2900.263

0.4000.3720.3440.3160.289

0.4270.3990.3710.3430.316

0.4530.4250.3970.3690.342

0.4800.4520.4240.3960.369

0.5080.4800.4520.4240.397

0.5360.5080.4800.4520.425

0.5640.5360.5080.4800.453

0.5940.5660.5380.5100.483

0.6250.5970.5690.5410.514

0.6570.6290.6010.5730.546

0.6910.6630.6350.6070.580

0.7280.7000.6720.6440.617

0.7690.7410.7130.6850.658

0.8170.7890.7610.7330.706

0.8770.8490.8210.7930.766

1.0200.9920.9640.9360.909

0.750.760.770.780.79

0.1320.1050.0790.0520.026

0.1580.1310.1050.0780.052

0.1840.1570.1310.1040.078

0.2100.1830.1570.1300.104

0.2360.2090.1830.1560.130

0.2620.2350.2090.1820.156

0.2890.2620.2360.2090.183

0.3150.2880.2620.2350.209

0.3420.3150.2890.2620.236

0.3700.3430.3170.2900.264

0.3980.3710.3450.3180.292

0.4260.3990.3730.3460.320

0.4560.4290.4030.3760.350

0.4870.4600.4340.4070.381

0.5190.4920.4660.4390.413

0.5530.5260.5000.4730.447

0.5900.5630.5370.5100.484

0.6310.6040.5780.5510.525

0.6790.6520.6260.5990.573

0.7390.7120.6850.6590.633

0.8820.8550.8290.8020.776

0.800.810.820.830.84

0.000 0.0260.000

0.0520.0260.000

0.0780.0520.0260.000

0.1040.0780.0520.0260.000

0.1300.1040.0780.0520.026

0.1570.1310.1050.0790.053

0.1830.1570.1310.1050.079

0.2100.1840.1580.1320.106

0.2380.2120.1860.1600.134

0.2660.2400.2140.1880.162

0.2940.2680.2420.2160.190

0.3240.2980.2720.2460.220

0.3550.3290.3030.2770.251

0.3870.3610.3350.3090.283

0.4210.3950.3690.3430.317

0.4580.4320.4060.3800.354

0.4990.4730.4470.4210.395

0.5470.5210.4950.4690.443

0.6090.5810.5550.5290.503

0.7500.7240.6980.6720.646

0.850.860.870.880.89

0.000 0.0270.000

0.0530.0260.000

0.0800.0530.0270.000

0.1080.0810.0550.0280.000

0.1360.1090.0830.0560.028

0.1640.1370.1110.0840.056

0.1940.1670.1410.1140.086

0.2250.1980.1720.1450.117

0.2570.2300.2040.1770.149

0.2910.2640.2380.2110.183

0.3280.3010.2750.2480.220

0.3690.3420.3160.2890.261

0.4170.3900.3640.3370.309

0.4770.4500.4240.3970.369

0.6200.5930.5670.5400.512

0.900.910.920.930.94

0.000 0.0280.000

0.0580.0300.000

0.0890.0610.0310.000

0.1210.0930.0630.0320.000

0.1550.1270.0970.0660.034

0.1920.1640.1340.1030.071

0.2330.2050.1750.1440.112

0.2810.2530.2230.1920.160

0.3410.3130.2830.2520.220

0.4840.4560.4260.3950.363

0.950.960.970.980.99

0.000 0.0370.000

0.0790.0410.000

0.1260.0890.0480.000

0.1860.1490.1080.0600.000

0.3290.2920.2510.2030.143

Page 13: CH Capacitor

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Application ConsiderationsApplication Considerations — Capacitors

Sheet 1635

Table 37.0-8. Recommended Wire Sizes, Switches and Fuses for 3-Phase, 60 Hz Capacitors

� 90°C Copper Type THHN, XHHW or equivalent, applied at 75°C ampacity. Rate current based on operation at rated voltage, frequency and kvar. Consult National Electrical Code for other wire types. Above size based on 30°C Ambient Operation. (Refer to NEC table 310-16.)

Note: Fuses furnished within Capacitor Assembly may be rated at higher value than shown in this table. The table is correct for field installations and reflects the manufacturer’s suggested rating for overcurrent protection and disconnect means in compliance with the National Electrical Code.

kvar 240 Volts 480 Volts 600 Volts

Current(Amps)

WireSize �

Fuse(Amps)

Switch(Amps)

Current(Amps)

WireSize �

Fuse(Amps)

Switch(Amps)

Current(Amps)

WireSize �

Fuse(Amps)

Switch(Amps)

0.5 1 1.5

1.2 2.4 3.6

141414

3 6 6

30 30 30

— 1.2 1.8

—1414

— 3 3

— 30 30

— 1.0 1.4

—1414

— 3 3

— 30 30

2 2.5 3

4.8 6.0 7.2

141414

10 10 15

30 30 30

2.4 3.0 3.6

141414

6 6 6

30 30 30

1.9 2.4 2.9

141414

6 6 6

30 30 30

4 5 6

9.6 12 14

141414

20 20 25

30 30 30

4.8 6.0 7.2

141414

10 10 15

30 30 30

3.8 4.8 5.8

141414

10 10 10

30 30 30

7.5 8 10

18 19 24

121010

30 35 40

30 60 60

9.0 9.6 12

141414

15 20 20

30 30 30

7.2 7.7 9.6

141414

15 15 20

30 30 30

12.5 15 17.5

30 36 42

886

50 60 80

60 60100

15 18 21

141210

25 30 40

30 30 60

12 14 17

141412

20 25 30

30 30 30

20 22.5 25

48 54 60

644

80100100

100100100

24 27 30

10108

40 50 50

60 60 60

19 22 24

101010

35 40 40

60 60 60

30 35 40

72 84 96

321

125150175

200200200

36 42 48

866

60 80 80

60100100

29 34 38

886

50 60 80

60 60100

45 50 60

108120144

1/02/03/0

200200250

200200400

54 60 72

442

100100125

100100200

43 48 58

664

90100100

100100100

75 80 90

180192216

250M300M350M

300350400

400400400

90 96108

1/01/01/0

150175200

200200200

72 77 86

331

125150150

200200200

100120125

241289300

400M(2)3/0(2)3/0

400500500

400600600

120144150

2/03/03/0

200200250

200200400

96115120

12/02/0

175200200

200200200

150180200

361432481

(2)250M(2)350M(2)400M

600750800

600800800

180216241

250M350M400M

300400400

400400400

144173192

3/0250M300M

250300350

400400400

240250300

———

———

———

———

289300361

(2)3/0(2)4/0(2)250M

500500600

600600600

231241289

400M400M(2)3/0

400400500

400400600

360400

——

——

——

——

432480

(2)350M(2)500M

750800

800800

346384

(2)250M(2)300M

600650

600800

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Sheet 1636

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600 Volts ac and Below

General Description

Sheet 1637

UNIPAK

UNIPAK

Product Description

Power Factor Correction Capacitors

Power factor correction capacitors and harmonic filters are an essential part of modern electric power systems. Power factor correction capacitors are the simplest and most economical means of increasing the transmission capacity of a power system, minimizing energy losses and correcting load power factor. In addition, power factor penalties can be reduced and power quality can be greatly enhanced.

There are two main reasons to correct poor power factor. The first is to reduce or eliminate a power factor penalty charged by your local utility. Another reason is that your existing transformer is, or shortly will be, at full capacity and installing power factor correction capacitors can be a very cost-effective solution to installing a brand new service. Depending on the amount of power factor correction (number of kvar that needs to be injected into the electrical system to improve the power factor) and the dynamic nature of the load, a fixed or switched capacitor bank may be the best solution. When capacity becomes a problem, the choice of a solution will be dependent upon the size of the increase needed. Like all power quality solutions, there are many factors that need to be considered when determin-ing which solution will be best to solve your power factor problem.

Harmonic Filtering

As the world becomes more depen-dent on electric and electronic equip-ment, the likelihood that the negative impact of harmonic distortion increases dramatically. The efficiency and productivity gains from these increasingly sophisticated pieces of equipment have a negative side effect…increased harmonic distortion in the power lines. The difficult thing about harmonic distortion is determin-ing the cause. Once this has been determined, the solution can be easy. Passive harmonic filtering equipment will mitigate specific harmonic issues, and correct poor power factor as well.

Applications

Individual Motors.

Motor Control Centers.

Distribution Switchboards.

Service Entrance Switchboards.

Features, Functions and Benefits

Five-year warranty on capacitor cells.

High quality construction.

Designed for heavy-duty applications.

Twenty-year life design.

Indoor/outdoor service.

Options available for NEMA 4X enclosure.

Wall or floor mounted banks available.

Fused protection standard.

Blown-fuse indicating lights standard.

Quick lead times.

Harmonic filters available.

Standards and Certifications

UL

and CSA

listed.

Features

Configuration

Outer case

: Heavy, No. 16 gauge steel finished with durable baked-on enamel. Series 100 universal mounting flanges for wall or floor installation. Series 200 and 400 floor mounting feet. Elimination of knockouts permits indoor/outdoor use. Manufactured to NEMA requirements 1, 3R and 12.

Cover:

“L” shaped gasketed cover with multiple fasteners provides front opening for ease of installation and service.

Ground terminal:

Furnished inside case.

Power line terminals:

Large size for easy connection.

Fusing:

Case Size Code AA:

Three midget type fuses with 100,000 ampere interrupting capacity.

Case Size Code BB and larger

: Three slotted-blade type fuses with 200,000 ampere interrupting capacity. Fuses mounted on stand-off bushings or fuse blocks. Solderless connectors for easy hookup of incoming line conductors.

Fuse indicating lights:

Red, neon blown-fuse indicating lights are protected by transparent weather-proof guard.

Options:

No fuses

Fused, no indicating lights

NEMA 4X enclosure

Capacitor Cells — Dry-Type

Terminals:

Threaded for secure connection, all sizes. 10 kVAC stand-off terminal bushings. Rated for 30 kV BIL.

Dielectric fill:

Thermosetting polymer resin.

Flash point: +415ºF (+212ºC)

Fire point: +500ºF (+260ºC)

Dielectric film:

Self-healing metallized polypropylene. Losses less than 1/2 watt per kvar.

Pressure-sensitive interrupter:

Built-in, three-phase interrupter design. UL recognized. Removes capacitor from line before internal pressures can cause case rupture.

Discharge resistors:

Reduce residual voltage to less than 50 volts within one minute of deenergization. Mounted on terminal stud assem-blies. Selected for 20-year nominal life. Exceeds NEC requirements.

Capacitor operating temperature:

-40ºF (-40ºC) to +115ºF (+46ºC).

Page 16: CH Capacitor

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General Description

Sheet 1638

UNIPAK Filter — Harmonic Filtering

Harmonic filter banks for low voltage, heavy-duty applications.

Reduces harmonics and corrects power factor.

Tuned for maximum efficiency in reducing harmonic currents associated with 6-pulse drive environments.

Sized for worst case harmonic current application.

Two-enclosure design to isolate capacitors from reactors.

Twenty-year life design.

Five-year cell warranty/one-year reactor warranty.

Three-phase cell capacitor construction. Three-phase interrupter system.

UL and CSA listed.

Applications

Designed for plants experiencing harmonics problems due to high loads of 6-pulse adjustable speed drives and power supplies.

Features

Configuration

Outer case:

Heavy, No. 16 gauge steel finished with durable baked-on enamel. Elimination of knockouts permits indoor/outdoor use. Meets NEMA requirements 1 and 12.

Cover:

“L” shaped gasketed cover with multiple fasteners provides front opening for ease of installation and service.

Ground terminal:

Furnished inside case.

Power line terminals:

Large size for easy connection.

Fusing:

Three slotted-blade type fuses with 200,000 ampere inter-rupting capacity. Fuses mounted on stand-off bushings or fuse blocks. Solderless connectors for easy hookup of incoming line conductors.

Fuse indicating lights:

Red, neon blown-fuse indicating lights.

Reactors

Tuning:

Tuned to 4.7 harmonic (nominal 5th).

Construction:

100% copper windings for cool operating temperatures; designed operating temperature rise less than 80ºC. Open frame construction with 180ºC insulation system.

Reactor indicating light:

Thermal overload indicating light activates when reactor temperature reaches 145ºC.

Warranty:

One-year replacement of reactors.

Page 17: CH Capacitor

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Technical Data

Sheet 1639

Individual Open Capacitor Cells

Figure 37.1-1. Cell Showing Threaded Nut and Stud Terminal ConnectionTable 37.1-1. Dry Cell Chart

kvar rating standard. NEMA kvar tolerance is +15% – 0%.

Catalog Number as shown is for 3-phase units.

Note:

Dry-type. Thermoplastic encapsulation medium.

Note:

On all units, customer must provide overcurrent protection as tabulated or equivalent (fuse interruption rating shall be 100,000 amperes or greater).

Note:

All units supplied unpainted.

Note:

Case material plate steel approximately 0.017 thick.

Voltage Rating kvar

Height — Inches (mm) Approximate Weight — Lbs. (kg) Catalog Number

240240240240

0.50 1.00 1.50 2.00

4.00 (101.6)4.00 (101.6)4.00 (101.6)4.00 (101.6)

2.1 (1.0)2.1 (1.0)2.1 (1.0)2.1 (1.0)

243PCDMF443PCDMF643PCDMF843PCDMF

240240240240

2.50 3.00 4.00 5.00

4.50 (114.3)5.50 (139.7)6.00 (152.4)5.00 (127.0)

2.6 (1.2)3.2 (1.5)3.5 (1.6)2.6 (1.2)

1043PCDMF12X43PCDMF16S43PCDMF523PCDMF

240240240

6.25 7.50 8.33

6.00 (152.4)6.00 (152.4)7.00 (177.8)

3.2 (1.5)3.5 (1.6)3.5 (1.6)

6A23PCDMF7X23PCDMF8B23PCDMF

480480480480

1.00 2.00 2.50 3.00

4.00 (101.6)4.00 (101.6)4.00 (101.6)4.00 (101.6)

2.1 (1.0)2.1 (1.0)2.1 (1.0)2.1 (1.0)

143PCDMF243PCDMF2X43PCDMF343PCDMF

480480480480

4.00 5.00 6.00 7.50

4.00 (101.6)4.00 (101.6)4.00 (101.6)4.00 (101.6)

2.1 (1.0)2.1 (1.0)2.1 (1.0)2.1 (1.0)

443PCDMF543PCDMF643PCDMF7X43PCDMF

480480480480

8.0010.0012.5015.00

4.00 (101.6)5.00 (127.0)5.50 (139.7)6.00 (152.4)

2.1 (1.0)2.6 (1.2)3.2 (1.5)3.2 (1.5)

843PCDMF1043PCDMF12X43PCDMF1543PCDMF

480480480

16.6717.5020.00

6.00 (152.4)7.00 (177.8)7.00 (177.8)

3.5 (1.6)3.5 (1.6)4.2 (1.9)

16S43PCDMF17X43PCDMF2043PCDMF

600600600600

2.00 2.50 5.00 7.50

4.00 (101.6)4.00 (101.6)4.00 (101.6)4.00 (101.6)

2.1 (1.0)2.1 (1.0)2.1 (1.0)2.1 (1.0)

263PCDMF2X63PCDMF563PCDMF7X63PCDMF

600600600600

10.0012.5015.0016.67

5.00 (127.0)6.00 (152.4)6.00 (152.4)7.00 (177.8)

2.6 (1.2)3.2 (1.5)3.5 (1.6)3.5 (1.6)

1063PCDMF12X63PCDMF1563PCDMF16S63PCDMF

600600

17.5020.00

7.00 (177.8)8.75 (222.3)

3.5 (1.6)5.0 (2.3)

17X63PCDMF2063PCDMF

DischargeResistors

1.00(25.4)

.75(19.1)

1.50(38.1)

3.78(96.0)

2.00(50.8)

4.59(116.6)

#12-24

“H“

1.25(31.8)

Page 18: CH Capacitor

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Technical Data

Sheet 1640

UNIPAK Low Voltage Fixed Capacitor Banks

Table 37.1-2. 240 Vac Selection Chart

Note:

UL listing for indoor service only.

Note:

Multiply the 240 Vac kvar rating by 0.75 to calculate the kvar value at 208 Vac.

Note:

Fused with blown-fuse indication available standard. Non-fused and no lights also available — please consult the factory.

Note:

Other ratings available, consult factory.

Note:

For dimensional information, refer to

Page 37.1-5

.Part Numbers: PMUDF – 3 Fuses + 3 Lights

PMUD3 – 3 Fuses + No LightsPMUDN – Non-Fused

Table 37.1-3. 480 Vac Selection Chart

Note:

UL listing for indoor service only.

Note:

Fused with blown-fuse indication available standard. Non-fused and no lights also available — please consult the factory.

Note:

Other ratings available, consult factory.

Note:

For dimensional information, refer to

Page 37.1-5

.Part Numbers: PMUDF – 3 Fuses + 3 Lights

PMUD3 – 3 Fuses + No LightsPMUDN – Non-Fused

Table 37.1-4. 600 Vac Selection Chart

Note:

UL listing for indoor service only.

Note:

Fused with blown-fuse indication available standard. Non-fused and no lights also available — please consult the factory.

Note:

Other ratings available, consult factory.

Note:

For dimensional information, refer to

Page 37.1-5

.Part Numbers: PMUDF – 3 Fuses + 3 Lights

PMUD3 – 3 Fuses + No LightsPMUDN – Non-Fused

kvar Rated CurrentAmperes

CaseSize

ShippingWeight Lbs. (kg)

Fused CatalogNumber

001.0001.5002.0002.5003.0

2.4 3.6 4.8 6.0 7.2

AAAAA

13 (6.0) 15 (6.8) 15 (6.8) 16 (7.3) 16 (7.3)

123PMUDF

1X23PMUDF

223PMUDF

2X23PMUDF

323PMUDF

004.0005.0006.0007.5008.0

9.6 12.0 14.4 18.0 19.2

AABBB

17 (7.7) 17 (7.7) 19 (8.6) 21 (9.5) 24 (10.9)

423PMUDF

523PMUDF

623PMUDF

7X23PMUDF

823PMUDF

009.0010.0011.0012.5015.0

21.6 24.1 26.0 30.0 36.0

CCCCC

27 (12.3) 28 (12.7) 30 (13.6) 32 (14.5) 34 (15.4)

923PMUDF

1023PMUDF

1123PMUDF

12X23PMUDF

1523PMUDF

017.5020.0022.5025.0027.5

42.0 48.0 54.0 60.0 66.0

DDDDE

41 (18.6) 42 (19.1) 44 (20.0) 46 (20.9) 50 (22.7)

17X23PMUDF

2023PMUDF

22X23PMUDF

2523PMUDF

27X23PMUDF

030.0032.5035.0037.5040.0

72.0 78.0 84.0 90.0 96.0

EFFFF

52 (23.6) 54 (24.5) 62 (28.1) 64 (29.1) 64 (29.1)

3023PMUDF

32X23PMUDF

3523PMUDF

37X23PMUDF

4023PMUDF

042.5045.0050.0060.0070.0

102.0108.0120.0144.0168.0

FFFGG

67 (30.4) 70 (31.8) 72 (32.7) 73 (33.1) 77 (35.0)

42X23PMUDF

4523PMUDF

5023PMUDF

6023PMUDF

7023PMUDF

075.0080.0100.0120.0140.0160.0

180.0192.0240.0289.0336.0385.0

GGHHHH

79 (35.9) 85 (38.6)238 (108.1)257 (116.7)272 (123.5)290 (131.7)

7523PMUDF

8023PMUDF

10023PMUDF

12023PMUDF

14023PMUDF

16023PMUDF

kvar Rated CurrentAmperes

CaseSize

ShippingWeight Lbs. (kg)

Fused CatalogNumber

001.0001.5002.0002.5003.0

1.2 1.8 2.4 3.0 3.6

A AAAA

12 (5.4) 12 (5.4) 12 (5.4) 12 (5.4) 13 (6.0)

143PMUDF

1X43PMUDF

243PMUDF

2X43PMUDF

343PMUDF

004.0005.0006.0007.5008.0

4.8 6.0 7.2 9.0 9.6

AAAAA

13 (6.0) 14 (6.4) 14 (6.4) 14 (6.4) 14 (6.4)

443PMUDF

543PMUDF

643PMUDF

7X43PMUDF

843PMUDF

009.0010.0011.0012.5015.0

10.8 12.0 13.0 15.0 18.0

AABBB

14 (6.4) 14 (6.4) 17 (7.7) 17 (7.7) 18 (8.2)

943PMUDF

1043PMUDF

1143PMUDF

12X43PMUDF

1543PMUDF

017.5020.0022.5025.0027.5

21.0 24.0 27.0 30.0 33.0

BBC CC

19 (8.6) 19 (8.6) 25 (11.4) 25 (11.4) 26 (11.8)

17X43PMUDF

2043PMUDF

22X43PMUDF

2543PMUDF

27X43PMUDF

030.0032.5035.0037.5040.0

36.0 39.0 42.0 45.0 48.0

CCCCC

26 (11.8) 26 (11.8) 26 (11.8) 28 (12.7) 30 (13.6)

3043PMUDF

32X43PMUDF

3543PMUDF

37X43PMUDF

4043PMUDF

042.5045.0050.0052.5055.0060.0

51.0 54.0 60.0 63.0 66.0 72.0

DDDDDD

32 (14.5) 32 (14.5) 35 (15.9) 36 (16.3) 36 (16.3) 37 (16.8)

42X43PMUDF

4543PMUDF

5043PMUDF

52X43PMUDF

5543PMUDF

6043PMUDF

065.0070.0075.0080.0

78.0 84.0 90.0 96.0

EEEE

39 (17.7) 42 (19.1) 45 (20.4) 47 (21.3)

6543PMUDF

7043PMUDF

7543PMUDF

8043PMUDF

085.0090.0100.0120.0125.0

102.0108.0120.0144.0150.0

FFFFG

50 (22.7) 52 (23.6) 54 (24.5) 57 (25.9) 74 (33.6)

8543PMUDF

9043PMUDF

10043PMUDF

12043PMUDF

12543PMUDF

140.0150.0160.0180.0200.0

168.0180.0192.0216.0241.0

GGGGG

74 (33.6) 76 (34.5) 77 (35.0) 79 (35.9) 85 (38.6)

14043PMUDF

15043PMUDF

16043PMUDF

18043PMUDF

20043PMUDF

225.0250.0300.0350.0400.0

264.0300.0361.0420.0480.0

HHHHH

239 (108.5)246 (111.7)260 (118.0)282 (128.0)290 (131.7)

22543PMUDF

25043PMUDF

30043PMUDF

35043PMUDF

40043PMUDF

kvar Rated CurrentAmperes

CaseSize

ShippingWeight Lbs. (kg)

Fused CatalogNumber

002.5005.0007.5009.0010.0

2.4 4.8 7.2 8.6 9.6

AAAAA

12 (5.4) 14 (6.4) 14 (6.4) 14 (6.4) 14 (6.4)

2X63PMUDF

563PMUDF

7X63PMUDF

963PMUDF

1063PMUDF

011.0012.5015.0017.5020.0

10.3 12.0 14.0 17.0 19.0

AABBB

17 (7.7) 17 (7.7) 18 (8.2) 19 (8.6) 19 (8.6)

1163PMUDF

12X63PMUDF

1563PMUDF

17X63PMUDF

2063PMUDF

022.5025.0027.5030.0032.5

22.0 24.0 26.0 29.0 32.0

CCCCC

25 (11.4) 25 (11.4) 26 (11.8) 26 (11.8) 26 (11.8)

22X63PMUDF

2563PMUDF

27X63PMUDF

3063PMUDF

32X63PMUDF

035.0037.5040.0042.5045.0

34.0 37.0 39.0 41.0 43.0

CCCDD

26 (11.8) 28 (12.7) 30 (13.6) 32 (14.5) 32 (14.5)

3563PMUDF

37X63PMUDF

4063PMUDF

42X63PMUDF

4563 PMUDF

050.0052.5055.0060.0065.0

48.0 51.0 53.0 58.0 63.0

DDDDE

35 (15.9) 36 (16.3) 36 (16.3) 37 (16.8) 39 (17.7)

5063PMUDF

52X63PMUDF

5563PMUDF

6063PMUDF

6563PMUDF

070.0075.0080.0085.0090.0

68.0 72.0 77.0 81.0 86.0

EEEFF

42 (19.1) 45 (20.4) 47 (21.3) 72 (32.7) 74 (33.6)

7063PMUDF

7563PMUDF

8063PMUDF

8563PMUDF

9063PMUDF

100.0120.0125.0140.0150.0

96.0115.0120.0134.0144.0

FFGGG

74 (33.6) 75 (34.1) 72 (32.7) 74 (33.6) 76 (34.5)

10063PMUDF

12063PMUDF

12563PMUDF

14063PMUDF

15063PMUDF

160.0180.0200.0225.0250.0

154.0173.0192.0216.0241.0

GGGHH

77 (35.0) 79 (35.9) 85 (38.6)240 (109.0)246 (111.7)

16063PMUDF

18063PMUDF

20063PMUDF

22563PMUDF

25063PMUDF

300.0350.0400.0

289.0336.0384.0

HHH

260 (118.0)282 (128.0)290 (131.7)

30063PMUDF

35063PMUDF

40063PMUDF

Page 19: CH Capacitor

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600 Volts ac and BelowTechnical Data

Sheet 1641

Enclosed Fixed Capacitor Banks and Fixed Harmonic Filters — Dimensions in Inches (mm)

Figure 37.1-2. Size Codes A – F

Figure 37.1-3. Size Code H

Figure 37.1-4. Size Code G

Table 37.1-5. Enclosures — Dimensions in Inches (mm)

.438 Diameter (11.1)Holes Typ.

B

L

A

X

H

Y

F

D

E

7.75(196.9).50

(12.7)

1.00 (25.4)6.75

(171.5)

3.37 (85.6)

Top

Front

Y

B

Side

H

E

A

of X

X

D

L

12

SideFront

Top

L

B

Y E

D

H

AX

of X12

SizeCode

Numberof Cells

A B D E F H L X Y

ABC

1 1 2

4.63 (117.6) 4.63 (117.6) 6.38 (162.1)

9.00 (228.6) 9.00 (228.6)10.00 (254.0)

5.00 (127.0) 5.50 (139.7) 5.50 (139.7)

3.75 (95.3) 3.75 (95.3) 3.75 (95.3)

7.31 (185.7) 9.81 (249.2) 9.81 (249.2)

14.38 (365.3)19.38 (492.3)19.38 (492.3)

7.00 (177.8) 7.00 (177.8) 8.00 (203.2)

2.75 (69.9) 2.75 (69.9) 2.75 (69.9)

8.18 (207.8) 8.81 (223.8) 9.18 (233.2)

DEF

3 4 5 and 6

6.38 (162.1) 8.38 (212.9)10.38 (263.7)

14.00 (355.6)12.00 (304.8)14.00 (355.6)

6.00 (152.4) 5.50 (139.7) 8.00 (203.2)

3.75 (95.3) 7.75 (196.9) 7.75 (196.9)

9.81 (249.2) 9.81 (249.2)10.75 (273.1)

19.38 (492.3)19.38 (492.3)20.25 (514.4)

12.00 (304.8)10.00 (254.0)12.00 (304.8)

2.75 (69.9) 6.75 (171.5) 6.75 (171.5)

13.18 (334.8)11.18 (284.0)13.81 (350.8)

GH

7 – 1011 – 20

10.38 (263.7)18.00 (457.2)

21.75 (552.5)38.30 (972.8)

9.50 (241.3)12.50 (317.5)

7.75 (196.9)15.75 (400.1)

——

21.38 (543.1)24.75 (628.7)

20.00 (508.0)36.63 (930.4)

6.75 (171.5)14.75 (374.7)

20.75 (527.1)37.30 (947.4)

Page 20: CH Capacitor

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June 2006

Power Factor Capacitors and Harmonic Filters

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600 Volts ac and BelowTechnical Data

Sheet 1642

UNIPAK Enclosed Fixed Harmonic FiltersTable 37.1-6. Fixed Filters — Low Voltage Applications Selection Chart

� See Page 37.1-5 for capacitor case dimensions.� Dimensions in mm: 628.7 x 508.0 x 460.5� Dimensions in mm: 635.0 x 616.0 x 514.4� Dimensions in mm: 787.4 x 635.0 x 831.9Note: Other ratings available, consult factory.

kvar Capacitor Cabinet Reactor Cabinet FusedCatalogNumber

Rated CurrentAmperes

CaseSize�

Shipping WeightLbs. (kg)

Case SizeH x W x D in Inches

Shipping WeightLbs. (kg)

CombinedWeightLbs. (kg)

240 Vac015.0025.0030.0

36 60 72

CDE

34 (15.4) 46 (20.9) 52 (23.6)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

90 (40.9)105 (47.7)110 (49.9)

124 (56.3)151 (68.6)162 (73.5)

15232HMUDF25232HMUDF30232HMUDF

050.0060.0075.0

120144180

FGG

72 (32.7) 73 (33.1) 79 (35.9)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

130 (59.0)160 (72.6)185 (84.0)

202 (91.7)233 (105.7)264 (119.9)

50232HMUDF60232HMUDF75232HMUDF

100.0125.0150.0

240300360

HHH

238 (108.1)270 (122.6)290 (131.7)

24.75 x 20.00 x 18.13 �25.00 x 24.25 x 20.25 �25.00 x 24.25 x 20.25 �

240 (109.0)280 (127.1)280 (127.1)

478 (217.1)550 (249.7)570 (258.8)

100232HMUDF125232HMUDF150232HMUDF

480 Vac015.0025.0030.0

18 30 36

BCC

29 (13.2) 45 (20.4) 46 (20.9)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

90 (40.9)105 (47.7)110 (49.9)

119 (54.1)150 (68.1)156 (70.8)

15432HMUDF25432HMUDF30432HMUDF

050.0060.0075.0

60 72 90

DEF

68 (30.9) 74 (33.6) 79 (35.9)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

130 (59.0)160 (72.6)185 (84.0)

198 (89.9)234 (106.2)264 (119.9)

50432HMUDF60432HMUDF75432HMUDF

100.0150.0200.0

120180241

FGH

85 (38.6)260 (118.0)290 (131.7)

24.75 x 20.00 x 18.13 �25.00 x 24.25 x 20.25 �25.00 x 24.25 x 20.25 �

240 (109.0)280 (127.1)330 (149.8)

325 (147.6)540 (245.1)620 (281.5)

100432HMUDF150432HMUDF200432HMUDF

250.0300.0

300360

HH

295 (133.9)300 (136.2)

31.00 x 25.00 x 32.75 �31.00 x 25.00 x 32.75 �

570 (258.8)575 (261.1)

865 (392.7)875 (397.3)

250432HMUDF300432HMUDF

600 Vac015.0025.0030.0

14 24 29

BCC

29 (13.2) 45 (20.4) 46 (20.9)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

90 (40.9)105 (47.7)110 (49.9)

119 (54.1)150 (68.1)156 (70.8)

15632HMUDF25632HMUDF30632HMUDF

050.0060.0075.0

48 58 72

DEF

68 (30.9) 74 (33.6) 79 (35.9)

24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �24.75 x 20.00 x 18.13 �

130 (59.0)160 (72.6)185 (84.0)

198 (89.9)234 (106.2)264 (119.9)

50632HMUDF60632HMUDF75632HMUDF

100.0150.0200.0

96144192

FGH

85 (38.6)260 (118.0)290 (131.7)

24.75 x 20.00 x 18.13 �25.00 x 24.25 x 20.25 �25.00 x 24.25 x 20.25 �

240 (109.0)280 (127.1)330 (149.8)

325 (147.6)540 (245.1)620 (281.5)

100632HMUDF150632HMUDF200632HMUDF

250.0300.0

241289

HH

295 (133.9)300 (136.2)

31.00 x 25.00 x 32.75 �31.00 x 25.00 x 32.75 �

570 (258.8)575 (261.1)

865 (392.7)875 (397.3)

250632HMUDF300632HMUDF

Figure 37.1-5. Filter Schematic with Wiring Interconnects

Power Lines from Disconnect

Lugs

Fuses

Reactor

Lugs

Lugs

Interconnects(Provided by Customer)

Capacitor Bank

Page 21: CH Capacitor

CA08104001E For more information visit: www.EatonElectrical.com

37.1-7June 2006

Power Factor Capacitors and Harmonic Filters

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600 Volts ac and BelowGeneral Description

Sheet 1643

UNIPUMP� Power Factor Correction CapacitorsNon-fused capacitors for outdoor irrigation and oil field installations.

■ Designed expressly for outdoor pumping applications.

■ Pole or wall mounting.■ Small, light enclosure for easy

installation.■ SO-WA type flexible cable facili-

tates installation (4-conductor).■ Gland-type weatherproof bushings.■ Strong outer case.■ UL and CSA listed.

ApplicationsOutdoor irrigation and oil field pumping.

Features

Configuration■ Outer case: Heavy, No. 18 gauge

steel finished with durable baked-on enamel. Integral strap mounting bracket with keyhole at top for pole or wall installation. No knockouts.

Capacitor Cells — Dry-Type■ Terminals: Threaded for secure con-

nection. 10 kVAC stand-off terminal bushings. Rated for 30 kV BIL.

■ Dielectric film: Self-healing metallized polypropylene. Losses less than 1/2 watt per kvar.

■ Pressure-sensitive interrupter: Built-in. UL recognized. Removes capacitor from line before internal pressures can cause case rupture. Three-phase interrupter design.

■ Discharge resistors: Reduce residual voltage to less than 50 volts within one minute of deenergization. Mounted on terminal stud assem-blies. Selected for 20-year nominal life. Exceeds NEC requirements.

■ Capacitor operating temperature: -40ºF (-40ºC) to +115ºF (+46ºC).

Technical Data

Figure 37.1-6. UNIPUMP Dimensions

Table 37.1-7. Dimensions in Inches (mm)

Note: All dimensions given in inches (mm) with a tolerance of ± .125 inches.

Table 37.1-8. Selection Chart

2.00(50.8)

1.81(46.0)

4.00(101.6)

B

1.63(41.4)

2.56(65.0)

MountingBKT.

.44 (11.2)Diameter

.09(2.3)

A

4.75(120.7)

1.50(38.1)

.75(19.1)

1.44(36.6)

.53(13.5)

C

D

.44 (11.2)Diameter

.81 (20.6)Diameter

1.94(49.3)

1.63(41.4)

SizeCode

A B C D

AA 8.88(225.6)

12.25(311.2)

10.47(265.9)

11.22(285.0)

BB 13.50(342.9)

16.94(430.3)

15.09(383.3)

15.84(402.3)

kvar RatedCurrent(Amps)

CaseSizeCode

CableSize

ShippingWt. Lbs.(kg)

CatalogNumber

240 Volt22.5345

4.8 6.0 7.2 9.612

AAAAAAAAAA

1414141414

10 (4.5)10 (4.5)10 (4.5)11 (5.0)11 (5.0)

223JMD2X23JMD323JMD423JMD523JMD

67.5

1518

BBBB

1212

27 (12.3)30 (13.6)

623JMD7X23JMD

480 Volt 2 2.5 3

2.4 3.0 3.6

AAAAAA

141414

9 (4.1) 9 (4.1) 9 (4.1)

243JMD2X43JMD343JMD

4 5 6

4.8 6.0 7.2

AAAAAA

141414

10 (4.5)10 (4.5)10 (4.5)

443JMD543JMD643JMD

7.51012.515

9121518

AAAAAAAA

14141212

11 (5.0)11 (5.0)11 (5.0)11 (5.0)

7X43JMD1043JMD12X43JMD1543JMD

17.520

2124

BBBB

8 8

21 (9.5)24 (11.0)

17X43JMD2043JMD

600 Volt 2.5 5 7.5

2.4 4.8 7.2

AAAAAA

141414

9 (4.1)10 (4.5)11 (5.0)

2X63JMD563JMD7X63JMD

1012.515

9.612.014.4

AAAAAA

141212

11 (5.0)11 (5.0)11 (5.0)

1063JMD12X63JMD1563JMD

17.520

16.819.2

BBBB

8 8

21 (9.5)24 (11.0)

17X63JMD2063JMD

Page 22: CH Capacitor

37.1-8

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June 2006

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General Description

Sheet 1645

AUTOVAR

300 Automatic Power Factor Correction Capacitor Systems

AUTOVAR 300 (25 – 300 kvar)

Automatically switched power factor correction systems for low voltage applications.

Wall-mount design is ideal for minimum space requirements.

Programmable to automatically add/subtract capacitor banks to maintain preset target power factor.

Heavy-duty, three-phase capacitor construction with reliable, threaded terminal connections.

Five-year warranty of cells.

UL and CSA listed.

Applications

Service entrance power factor correc-tion installations requiring precise maintenance of target power factor in a very small footprint.

Configuration

Cabinet

: 14 gauge steel with ANSI 61 gray. NEMA 1.

Power line interconnect:

Rugged, power distribution block connection.

Fusing:

200,000 ampere interrupting capacity provided on all three phases of each bank. Blade-type fuses mounted on insulator stand-offs with blown-fuse indicating lights.

Blown-fuse lights:

Blown-fuse indicating lights located on the door.

Door interlock:

Door interlock auto-matically turns off capacitor banks when engaged. Power continues to be provided to the unit until the disconnect is open.

Controller

Digital display of power factor and number of energized banks.

Automatic setting of c/k value.

Visual display of harmonic overload.

Visual indication of insufficient kvar to reach target power factor.

Output relays disabled within 35 milliseconds of main power interruption.

Personnel ground fault interruption provides protection in case of acci-dental contact with control power and ground.

Optional RS-232 communications.

Options

Current transformer.

HOA control switch.

Alarm relay.

Molded case circuit breaker.

NEMA 3R enclosure.

See

Page 37.2-4

for more details on options.

For dimensions refer to Page 37.2-4.

Page 24: CH Capacitor

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CA08104001E

June 2006

Power Factor Capacitors and Harmonic Filters

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General Description

Sheet 1646

AUTOVAR 600

Automatic Power Factor Correction Capacitor Systems

AUTOVAR 600 (75 – 1200 kvar)

Applications

Service entrance power factor correc-tion installations requiring precise maintenance of target power factor.

Features

Configuration

Cabinet

: 12 gauge steel with ANSI 61 gray, baked enamel finish. Lift bolts standard. NEMA 1.

Power line interconnect:

Rugged, copper bus bar connection with access provided for top or bottom entry. All internal power wiring con-nections from bus are laid out on a most direct basis with minimum bends for ease of troubleshooting.

Modular tray design:

Capacitor banks arranged in modular trays with capacitors, fuses, blown-fuse indicating lights, and contactors grouped in a logical, easily understood layout. This permits easy access, quick identification of operating problems and ease of expandability.

Fusing:

UL recognized, 200,000 ampere interrupting capacity provided on all three phases of each bank. Blade-type fuses mounted on insulator stand-offs.

Blown-fuse lights:

Blown-fuse indicating lights located on the door and at individual fuses to facilitate tracing of cleared fuses.

Push-to-test:

Allows testing of door fuse indicating lights.

AutoLocate:

When door is open and bus energized, fuse circuit automati-cally checks for cleared fuses. If a fuse has cleared, the light at the fuse comes on for easy troubleshooting.

Door interlock:

Door interlock auto-matically turns off control circuit when engaged. Power continues to be provided to the unit until disconnect is open.

Exhaust fans:

Two fans per cabinet provide thermal protection. Dust filtering provided.

Controller

Digital display of power factor and number of energized banks.

Automatic setting of c/k value.

Visual display of harmonic overload.

Visual indication of insufficient kvar to reach target power factor.

Output relays disabled within 35 milliseconds of main power inter-ruption.

Personnel ground fault interruption provides protection in case of accidental contact with control power and ground.

Control wiring — standard NEC color-coded modular bundles with quick disconnect feature for ease of troubleshooting or ease of expandability.

Optional RS-232 communications.

Options

Current transformer.

HOA control switch.

Alarm relay.

Molded case breaker.

NEMA 3R enclosure.

Ammeter.

Voltmeter.

IQ 220 digital meter.See

Page 37.2-5

for more details on options.

For dimensions refer to Page 37.2-5.

Page 25: CH Capacitor

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37.2-3

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General Description

Sheet 1647

AUTOVAR Filter — Automatic Harmonic Filter

AUTOVAR Filter (300 – 600 kvar)

Automatically switched harmonic filter/power factor corrections systems.

Programmable to automatically add/subtract filter banks to maintain preset target power factor.

Filter steps tuned for maximum efficiency in reducing harmonic currents in three-phase environ-ments with heavy 6-pulse loads.

Efficient modular design for short lead times, ease of maintenance and ease of future expansion.

Heavy-duty, three-phase capacitor construction with reliable, threaded terminal connections.

Cool operating, 100% copper wound, thermal protected reactors are sized for worst-case, 6-pulse harmonic environment.

UL and CSA listed.

Applications

Service entrance power factor correction installations requiring precise maintenance of target power factor in three-phase, 6-pulse, high harmonic environments.

For dimensions refer to Page 37.2-6.

Features

Configuration

Operation:

AUTOVAR harmonic filters are designed to be sized the same as any power factor cor-rection unit. In most low voltage applications where harmonics are generated by 6-pulse devices, no harmonic audit is necessary to design the AUTOVAR filter because it is already designed for the worst-case environment at the kvar size specified.

Cabinet:

12 gauge steel with ANSI 61 gray, baked enamel. Lift bolts standard. NEMA 1.

Power line interconnect:

Rugged, copper bus bar connection with access provided for top or bottom entry. All internal power wiring con-nections from bus are laid out on a most direct basis with minimum bends for ease of troubleshooting.

Modular tray design:

Capacitor banks arranged in modular trays with capacitors, fuses, blown-fuse indicating lights, and contactors grouped in a logical easily under-stood layout. This permits easy access, quick identification of operating problems and ease of expandability.

Fusing:

UL recognized, 200,000 ampere interrupting capacity pro-vided on all three phases of each bank. Blade-type fuses mounted on insulator stand-offs.

Blown-fuse lights:

Blown-fuse indicating lights located on the door and at individual fuses to facilitate tracing of cleared fuses.

Push-to-test:

Allows testing of door fuse indicating lights.

AutoLocate:

When door is open and bus energized, fuse circuit auto-matically checks for cleared fuses.If a fuse has cleared, the light at that fuse comes on for easy troubleshooting.

Door interlock:

Door interlock automatically turns off control circuit when engaged. Power continues to be provided to the unit until disconnect is open.

Interwiring:

On-site interwiring of multiple cabinet design is made simple by prenumbered bundles and clear diagrams.

Exhaust fans:

Two fans per cabinet provide thermal protection for both capacitor cabinet and reactor cabinet. Dust filtering provided.

Controller

Digital display of power factor and number of energized banks.

Automatic setting of c/k value.

Visual display of harmonic overload.

Visual indication of insufficient kvar to reach target power factor.

Output relays disabled within 35 milliseconds of main power interruption.

Personnel ground fault interruption provides protection in case of accidental contact with control power and ground.

Control wiring — standard NEC color-coded modular bundles with quick disconnect feature for ease of troubleshooting or ease of expandability.

Reactors

Tuning:

Reactors tuned to the 4.7th harmonic (nominal 5th). This provides maximum effectivenessin reducing harmonic currents in three-phase systems with harmon-ics caused by 6-pulse devices.

Windings:

100% copper windings for minimal temperature rise under load.

Thermal overload protection:

Each reactor includes three normally closed, auto reset thermostats that open at 145°C. When thermostats engage, the contactor opens.

Insulation

: 180°C insulation system.

Warranty

: One-year replacement of reactors.

Options

See

Page 37.2-6

for details on options.

Page 26: CH Capacitor

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CA08104001E

June 2006

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Dimensions

Sheet 1648

Technical Data

AUTOVAR 300 Automatic Power Factor Correction Capacitor Systems

Table 37.2-1. Wall-Mounted Switched Capacitor Banks — Low Voltage Applications

Note: Other ratings available, consult factory.

Table 37.2-2. AUTOVAR 300 Options

� A current transformer with a 5 ampere secondary is required to operate an automatic capacitor bank.

kvar Step x kvar

Rated CurrentAmperes

Case Size

Shipping WeightLbs. (kg)

FusedCatalogNumber

240 Vac025.0050.0075.0100.0125.0

5 x 55 x 105 x 154 x 255 x 25

60120180240300

JJJJJ

217 (98.5)255 (115.8)260 (118.0)270 (122.6)292 (132.6)

25MCSD23150MCSD23175MCSD231100MCSD231125MCSD231

480 Vac050.0075.0100.0125.0150.0

5 x 105 x 155 x 205 x 255 x 30

60 90120150180

JJJJJ

200 (90.8)210 (95.3)210 (95.3)240 (109.0)240 (109.0)

50MCSD431375MCSD4313100MCSD4313125MCSD4313150MCSD4313

175.0200.0225.0250.0300.0

5 x 355 x 405 x 455 x 505 x 60

210241270300361

JJJJJ

260 (118.0)270 (122.6)290 (131.7)292 (132.6)310 (140.7)

175MCSD431200MCSD431225MCSD431250MCSD431300MCSD431

600 Vac050.0075.0100.0125.0150.0

5 x 105 x 155 x 205 x 255 x 30

48 72 96120144

JJJJJ

200 (90.8)210 (95.3)210 (95.3)240 (109.0)240 (109.0)

50MCSD631375MCSD6313100MCSD6313125MCSD6313150MCSD6313

175.0200.0225.0250.0300.0

5 x 355 x 405 x 455 x 505 x 60

168192216240288

JJJJJ

260 (118.0)270 (122.6)290 (131.7)292 (132.6)310 (140.7)

175MCSD631200MCSD631225MCSD631250MCSD631300MCSD631

Description OptionCode

Current transformer — Multi-tap, split core current transformer (3000:5 A) � TX2

Hands-off Auto Switch — Provides manual control to connect or disconnect capacitor stages regardless of controller output

H

Remote Alarm Relay — Relay for a remote alarm to indicate inability to reach target power factor

A

Molded case circuit breaker M

Weatherproofing (NEMA 3R) W

Enclosure J — Dimensionsin Inches (mm)

Figure 37.2-1. Front View of Enclosure J

Figure 37.2-2. Side View of Enclosure J

Table 37.2-3. Enclosure J — Dimensionsin Inches (mm)Description Height A

Without MCCB 36.00 (914.4)

With MCCB 60.00 (1524.0)

36.00 (914.4)

29.88(759.0)

On/Off Switch

Power Factor Controller

Keylock Handle

Blown Fuse Lights

A

0.63 (16.0)

0.63 (16.0) 12.00 (304.8)

Page 27: CH Capacitor

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Sheet 1649

AUTOVAR 600 Automatic Power Factor Correction Capacitor SystemsTable 37.2-4. Floor-Mounted Switched Capacitor Banks — Low Voltage Applications

Note: Other ratings available, consult factory.

Table 37.2-5. AUTOVAR 600 Options

� A current transformer is required to operate an automatic capacitor bank.

kvar Step x kvar

Rated CurrentAmperes

Case Size

Shipping WeightLbs. (kg)

FusedCatalogNumber

240 Vac075.0100.0125.0150.0

3 x 25 4 x 25 5 x 25 6 x 25

180241300361

LLLL

644 (292.4) 692 (314.2) 740 (336.0) 788 (357.8)

75TPCSD231100TPCSD231125TPCSD231150TPCSD231

200.0250.0300.0

8 x 2510 x 2512 x 25

481600720

LLL

884 (401.3) 944 (428.6)1022 (464.0)

200TPCSD231250TPCSD231300TPCSD231

480 Vac150.0200.0250.0300.0

3 x 50 4 x 50 5 x 50 6 x 50

180240300360

LLLL

632 (287.0) 676 (306.9) 720 (326.9) 764 (346.9)

150TPCSD431200TPCSD431250TPCSD431300TPCSD431

350.0400.0450.0500.0

7 x 50 8 x 50 9 x 5010 x 50

420480540600

LLLL

808 (366.8) 852 (386.8) 896 (406.8) 944 (428.6)

350TPCSD431400TPCSD431450TPCSD431500TPCSD431

550.0600.0660.0720.0

11 x 5012 x 5011 x 6012 x 60

660720792864

LLLL

984 (446.7)1022 (464.0)1010 (458.5)1050 (476.7)

550TPCSD431600TPCSD431660TPCSD431720TPCSD431

600 Vac150.0200.0250.0300.0

3 x 50 4 x 50 5 x 50 6 x 50

144192240288

LLLL

632 (287.0) 676 (306.9) 720 (326.9) 764 (346.9)

150TPCSD631200TPCSD631250TPCSD631300TPCSD631

350.0400.0450.0500.0

7 x 50 8 x 50 9 x 5010 x 50

336384432480

LLLL

808 (366.8) 852 (386.8) 896 (406.8) 944 (428.6)

350TPCSD631400TPCSD631450TPCSD631500TPCSD631

550.0600.0660.0720.0

11 x 5012 x 5011 x 6012 x 60

528576634692

LLLL

984 (446.7)1022 (464.0)1010 (458.5)1050 (476.7)

550TPCSD631600TPCSD631660TPCSD631720TPCSD631

Description OptionCode

Current transformer — Multi-tap, split core current transformer � TX2

Hands-off Auto Switch — Provides manual control to connect or disconnect capacitor stages regardless of controller output

H

Remote Alarm Relay — Relay for a remote alarm to indicate inability to reach target power factor

A

Molded case circuit breaker M

Weatherproofing (NEMA 3R) W

Ammeter — Indicates current of each phase A2

Voltmeter — Indicates voltage of each phase V

IQ 220 Solid-State Meter IQ

Enclosure L — Dimensions in Inches (mm)

Figure 37.2-3. Front View of Enclosure L

Figure 37.2-4. Side View of Enclosure L

38.50(977.9)

2.69(68.3)

26.00(660.4)

3.69(93.7) 7.50

(190.5)

BusBars

15.81(401.6)

75.00(1905.0)

41.06(1042.9)

3.00(76.2)

25.00(635.0)

(4) .53 (13.5)Holes

13.00(330.2)

6.00(152.4)

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Sheet 1650

AUTOVAR Switched Harmonic FiltersTable 37.2-6. Floor-Mounted Switched Harmonic Filters — Low Voltage

Note: L + L under Case Size denotes two Size L enclosures — one for the capacitors, one for the reactor case. See Page 37.2-5 for size L dimensions.Note: Other ratings available, consult factory.

Table 37.2-7. AUTOVAR Filter Options

� A current transformer is required to operate an automatic capacitor bank.

kvar Step x kvar

RatedCurrentAmperes

Case Size

Shipping WeightLbs. (kg)

FusedCatalogNumber

480 Vac300.0350.0400.0450.0

6 x 50 7 x 50 8 x 50 9 x 50

360420480540

L + LL + LL + LL + L

1830 (830.8)2026 (919.8)2222 (1008.8)2371 (1076.4)

300THFSD432350THFSD432400THFSD432450THFSD432

500.0550.0600.0

10 x 5011 x 5012 x 50

600660720

L + LL + LL + L

2525 (1146.4)2750 (1248.5)2830 (1284.8)

500THFSD432550THFSD432600THFSD432

600 Vac300.0350.0400.0450.0

6 x 50 7 x 50 8 x 50 9 x 50

288336384432

L + LL + LL + LL + L

764 (346.9) 808 (366.8) 852 (386.8) 896 (406.8)

300THFSD632350THFSD632400THFSD632450THFSD632

500.0550.0600.0

10 x 5011 x 5012 x 50

480528576

L + LL + LL + L

944 (428.6) 984 (446.7)1022 (464.0)

500THFSD632550THFSD632600THFSD632

Description Option Code

Current transformer — Multi-tap, split core current transformer � TX2

Hands-off Auto Switch — Provides manual control to connect or disconnect capacitor stages regardless of controller output H

Remote Alarm Relay — Relay for a remote alarm to indicate inability to reach target power factor A

Molded case circuit breaker M

Weatherproofing (NEMA 3R) W

Ammeter — Indicates current of each phase A2

Voltmeter — Indicates voltage of each phase V

IQ 220 Solid-State Meter IQ

Page 29: CH Capacitor

CA08104001E For more information visit:

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General Description

Sheet 1651

Active-Harmonic Filter-Harmonic Correction Unit — NEMA 1 Enclosure Specifications

Harmonic Correction Units — NEMA 1 Enclosure

Product Description

Harmonic Correction Units

Active Harmonic Filters provide active harmonic control. The Active Harmonic Correction Unit will monitor the distorted electrical signal, deter-mine the frequency and magnitude of the harmonic content, and then cancel those harmonics with the dynamic injection of opposing current. Active harmonic control provides the benefit of traditional passive filters with simpler engineering require-ments, easier and less expensive installation, comprehensive control, and assured compliance with the IEEE 519-1992 standard.

Applications

PWM ac drives.

dc drives.

Water and wastewater treatment plants.

HVAC — Commercial.

Compliance to IEEE 519:

Military

Industrial

Commercial

Features

Table 37.3-1. Harmonic Correction Unit — Features (NEMA 1 Enclosure)

Requires series input line reactor or dc bus choke in each ac drive for optimum performance.

Third-PartyTesting Agency

UL:CSA:

LabeledLabeled

Electrical Voltage:Frequency:

208 – 480 Volt +/- 10%50/60 Hz, +/- 3 Hz

Environment Ambient Temperature:Storage Temperature:Relative Humidity:Altitude:Vibration:

0º – 40ºC Enclosed-40º – 65ºCto 95% Non-condensingto 2000 MetersSeismic Zone 4

Packaging Standard Enclosure: NEMA 1Wall Mount (50/100 Amperes)Floor Standing (300 Amperes)

Protection Input FusesSurge Withstand Capacity:Logic Ride-Through:Output Capacity:

600 Volt, 200,000 AIC, Class TIEEE C62.41-199130 Seconds Upon Full Loss of Input VoltageSelf-limited to 100% Rated

Performance Corrective Capability: <5% TDD and Near Unity Displacement Power Factor

Information/Control Display:Operators:Indicator LED:Information Diagnostics:Output Contacts:

2 Line, 20 Character/Line AlphanumericRun, Stop, Setup, Enter Up and Down ScrollRun (Green)EnglishPower On, Run, Fault, at Maximum Capacity

Page 30: CH Capacitor

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Technical Data

Sheet 1652

Sizing and Product Selection

Table 37.3-2. Harmonic Control Units Ratings — NEMA 1 Enclosed

Table 37.3-3. Current Transformer Ratings — Dimensions in Inches (mm)

Note:

Current transformers are rated for 400 Hz. Two current trans-formers are required for 3-phase loads. Three current transformers are required when single-phase loads are present.

Figure 37.3-1. Installation Diagram — Select CT Ratio to Match Bus Rating. Size the HCU Unit Only for the Amount of Current Correction Required

Table 37.3-4. Digital Interface Specifications

Figure 37.3-2. Power Circuit Diagram HCU

Model Type Voltage Frequency Total Current Amperes(rms)

WattLosses(kW)

Exterior Dimensions in Inches (mm)H x W x D

Unit WeightLbs. (kg)

EnclosureType

Disconnect

HCU050D5N1HCU100D5N1HCU300D5N1

208 – 480208 – 480208 – 480

50/6050/6050/60

50100300

1.83.08.0

51.80 x 20.70 x 18.50 (1315.7 x 525.8 x 469.9)68.70 x 20.70 x 18.50 (1745.0 x 525.8 x 469.9)74.90 x 32.20 x 19.50 (1902.5) x 817.9 x 495.3)

250 (113.5)350 (158.9)775 (351.9)

Wall-Mount/NEMA 1Wall-Mount/NEMA 1Free-Standing/NEMA 1

——X

Model Type

ac LineCurrent Rating

Type Internal Diameter in Inches (mm)

CT500SCCT1000SC

5001000

SplitSplit

2.25 (57.2)4.65 (118.1)

CT3000SCCT5000SC

30005000

SplitSplit

6.50 (165.1)7.50 (190.5)

SourceXFMR

Alternate CTPlacement

Typical CTPlacement

HCU

Load(s)

Optional Disconnect for 300 Ampere Rating

ModelType

Cable LengthFeet (m)

DIMCBL03DIMCBL05DIMCBL10

7.6 (2.3)12.7 (3.9)25.4 (7.7)

C

E

C

E

C

E

C

E

C

E

C

E

C

Lin

eIn

du

cto

r

FilterBoard

Pre-chargeContactor

Inductor

Fuse

AC

S4

S5

S6

S1

S2

S3

LinesFuse

Fuse

Page 31: CH Capacitor

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Dimensions

Sheet 1653

Model Drawings

Model HCU050 Layout Dimensions — NEMA 1 Enclosure

The HCU050 series offers 50 amperes of corrective current in a convenient package. The enclosed model comes standard with a digital interface panel for control diagnostics and programming. Input fuses are included. The enclosed unit includes a removable panel for bottom conduit entry.

Figure 37.3-3. HCU050 — 50 Amperes — Dimensions in Inches (mm)

4.57(116.1) 8.73

(221.6)

16.67(423.4)

16.06(408.0)

4.69(119.1)

7.46(189.5) 50.33

(1278.4)

6.00(152.4)

20.67(525.0)

Conduit Plate

5.25(133.4)

1.63(41.4)

2.75(69.9)

6.25(158.8)

2.17(55.1)

.85(21.6)

4.63(117.6)

6.25(158.8)

.53(13.5)

9.98(253.5)

7.70(195.6)

3.17(80.5)

48.00(1219.2)

Page 32: CH Capacitor

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Dimensions

Sheet 1654

Model HCU100 Layout Dimensions — NEMA 1 Enclosure

The HCU100 series offers 100 amperes of corrective current in a wall-mounted NEMA 1 enclosure. The enclosed model comes standard with a digital interface module for control, diagnostics and programming. Input fuses are included. The enclosed unit includes a removable panel for bottom conduit entry.

Figure 37.3-4. HCU100 — 100 Amperes — Dimensions in Inches (mm)

9.79(248.7)

4.62(117.3)

20.67(525.0)

16.67(423.4)

19.94(506.5)8.81

(223.8)

67.19(1706.6)

5.00(127.0)

3.75(95.3)

16.67(423.4)

65.23(1656.8)

.51(13.0)

11.08(281.4)

3.05(77.5)

7.70(195.6)

1.10(27.9)

5.25(133.4)

6.25(158.8)

2.55(64.8)

6.25(158.8)

2.38(60.5)

5.25(133.4)

Conduit Plate

1.38(35.1)

Page 33: CH Capacitor

CA08104001E For more information visit:

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Dimensions

Sheet 1655

Model HCU300 Layout Dimensions — NEMA 1 Enclosure

The HCU300 series offers 300 amperes of corrective current for large capacity applications. It is available in a floor-standing NEMA 1 enclosure (including a door-interlocking disconnect). The enclosed model comes standard with digital interface mod-ule for control, diagnostics and programming. Input fuses are included. The enclosed unit includes a removable panel for top conduit entry.

Figure 37.3-5. HCU300 — 300 Amperes — Dimensions in Inches (mm)

22.08(560.8)

19.23(488.4)

3.00(76.2)

Conduit Plate

31.50(800.1)

8.00(203.2)

23.10(586.7)

5.02(127.5)

7.00(177.8)

6.50(165.1)

17.38(441.5)

5.00(127.0)

3.63(92.2)

13.62(345.9)

70.95(1802.2)

74.71(1897.6)

2.72(69.1)

12.22(310.4)

13.98(355.1)

15.31(389.0)

.55 TYP(14.0)

27.13(689.1)

4.32(109.7)

.55 TYP(14.0)

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Low Voltage

General Description

Sheet 1657

Transient-Free Static Switching Power Factor Correction Units

Power Factor Correction Unit

Product Description

Transient-free static switching units are available in two models.

The FTE model is a real-time transient-free system, used to compensate extremely rapid loads within one cycle of operation (typically 5 – 20 msec).

The FTA model is a fast transient-free system, used to compensate any loads within 3 – 4 seconds.

Units are available as tuned (designed to absorb the 5th and 7th harmonics), or detuned (designed to prevent resonance in a system and absorb up to 50% of the 5th harmonic).

Features

Transient-free capacitor group switching, using electronic switching elements.

Simultaneous connection/disconnection of all required steps.

Consistent capacitor values and stable filter characteristics.

Harmonic filtration.

Three independent control modes:

Power factor control

Voltage control

Load sharing with another compensation system connected to the same transformer

Unique SCAn feature reduces capacitor duty cycles.

Remote control of compensation systems available via LAN or Ethernet.

Integrated three-phase network analyzer:

Measures all power parameters on each phase (V, I, kW, kvar, kVA)

Measures voltage and current harmonics to the 63rd harmonic.

FTE unit includes all of the above, plus:

Reduces voltage flicker and voltage sag.

Provides network reactive power support.

Offers voltage control options.

Page 36: CH Capacitor

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Low Voltage

General Description

Sheet 1658

Figure 37.4-1. Application Example — Spot Welding

Product Configurations

Network Voltage

210 – 690 V — other voltages available upon request.

Frequency

45 – 55 Hz for 50 Hz network.

55 – 65 Hz for 60 Hz network.

Capacitor Group Configurations

Up to 12 groups per one controller.

Switching sequence:

1:1:1:1 (all equal)

1:2:2:2 (half group)

1:2:4:4 (quarter, half groups)

Acquisition Time

FTE — 5 – 20 ms for a 50 Hz network.

FTE — 4 – 16 ms for a 60 Hz network.

FTA — 1 – 4 second maximum.

Enclosure

NEMA 1 / IP20.

Applicable Standards

EMC — EN50081-2, EN50082-2, EN55011, EN61000-4-2/3/4/5, ENV50204, ENV50141

CE Mark — 73/23/EEC am. 93/68, 98/37/EC art. 4(2)

Safety — EN61010-1, EN60439-1, EN60204

UL 508

CSA

Applications

Motor starting.

On-site generation support.

Spot welding.

Wind turbines.

Other dynamic loads.

21:33:38

0

150

300

1000

1400

1800

210

220

230

L1-Q

(kV

AR

)L

1-C

urr

en

t (A

)L

1-V

olt

ag

e (

V)

Spot Welding (Auto Manufacturer)

:40 :42 :44 :46 :48 :50 :52 :54 :56 :58 :00 :02 :04 :06 :08

Without With

For further information and dimensions, contact Eaton.

Page 37: CH Capacitor

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1659

UNIVAR

UNIVAR Fixed Medium Voltage PFC Unit

Product Description

Capacitors for medium voltage, heavy-duty applications:

UNIVAR capacitors are designed for power factor correction in applica-tions where a fixed amount of capacitance (kvar) is required.

2400 V, 4160 V, 4800 V, 6600 V, 7200 V, 12,470 V or 13,800 V.

Fast economical payback.

Individual units or multiple assem-blies can be designed.

Indoor dustproof/outdoor water-proof enclosures (NEMA 12, NEMA 3R).

Floor mounting.

2- or 3-phase fused options for 2400 V – 4800 V. All units above 4800 V are supplied with fusing on all three phases (see

Note

).

NEMA 3R terminal box.

Note:

NEC Article 460-8 (b)(1)requires capacitors to have overcurrent protection in all ungrounded conductors (except if con-nected on the load side of a motor overload protection device). Three-phase capacitors fused only on two phases will not provide adequate protection if a line-to-ground fault should occur in the unfused phase.

Applications

Large motors.

Motor control centers.

Branch circuits.

Service entrances.

Utility Customers

Metal-enclosed power factor correc-tion systems are fully assembled, tested and ready for installation. Very little field assembly is required. Installation and maintenance costs for metal-enclosed systems are low compared to pole and rack mounted capacitor banks. Metal-enclosed sys-tems and harmonic filters are less vulnerable to wildlife and airborne contaminants that can cause tracking and faults. In addition, metal-enclosed systems significantly reduce the risks and the associated liability involving untrained personnel. All live parts are contained in a grounded, key inter-locked enclosure and no internal hard-ware is accessible. Metal-enclosed systems are aesthetically pleasing due to their low profile, and can be painted to match the surrounding architecture. These are just some of the reasons more and more utilities are utilizing metal-enclosed capacitor and harmonic filter systems.

Industrial Customers

Large industrial power users can utilize the benefits associated with medium voltage power factor correction and harmonic filtering. Medium voltage solutions usually support the scale and scope of larger services. Medium voltage applications can be found in the following types of industries as examples: automotives, pulp and paper, plastics, petrochemical, and heavy manufacturing. Individual fixed capacitors provide power factor correc-tion directly at the cause of the prob-lem, such as a large horsepower MV motor. Medium voltage systems allow large industrials to correct power fac-tor at or close to the point of common coupling (PCC), where the utility elec-trical system meets theirs. This allows correction for an entire facility, instead of having to correct at multiple loca-tions. The Cutler-Hammer NEMA

3R design also allows the system to be placed outdoors, saving valuable man-ufacturing floor space. The savings can be enormous, in materials, installation costs and floor space. In short, medium voltage solutions provide a cost-effective alternative to many local low voltage power factor correction units, while protecting the customer’s entire electrical distribution system.

Commercial Customers

Many commercial customers are purchasing power from their utility at higher voltages today (2.4 kV– 15 kV), and can also take advantage of medium voltage power factor correction systems. These solutions can meet the needs of large office complexes, hospi-tals and universities, among others. The benefits of safety (key interlocking, no exposed live parts, etc.), and aes-thetics (low profile, can be painted to match environment) both meet the needs of these applications where there are large numbers of untrained person-nel in proximity of electrical equipment.

Features

Enclosure

16-gauge steel finished with durable baked-on enamel. The wiring enclosure is gasketed to create a weatherproof, dustproof seal. Universal mounting flanges are provided for floor installa-tion. The elimination of knockouts per-mits indoor/outdoor use. Unit meets NEMA 1, 3R and 12 requirements. Enclosure is painted ANSI 70 gray.

Terminal Insulators

Wet process porcelain.

Dielectric fluid.

NFPA IIIB liquid.

Fusing

Fuses are rated 50,000 amperes sym-metrical interrupting capacity. Ratings are 165% to 250% of rated current. Fuses have visual pop-up blown fuse indication standard.

Discharge Resistors

These reduce the residual voltage to less than 50 V residual within five (5) minutes of de-energization.

Grounding Lugs

Standard.

Power Line Terminals

Large size for easy connection.

Operating Temperature

-40ºF (-40ºC) to 115ºF (+46ºC)

Optional Features

Two or three fuses (2400 V to 4800 V).

Blown fuse indicating lights (2400 V to 4800 V) for external indication.

NEMA 4X stainless steel.

CSA testing and labels.

Inrush reactors.

Page 38: CH Capacitor

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Metal-Enclosed — Medium Voltage

Technical Data

Sheet 1660

Technical Data

Table 37.5-1. UNIVAR Three-Phase Ratings

Table 37.5-2. UNIVAR Dimensions — Standard 2 Fuses (2400 — 4800 Volts)

See

Page 37.5-3

for figure and drawing details.

Volts Hertz kvar

2400 60 25 – 825

4160 60 25 – 900

4800 60 25 – 900

6600 50/60 25 – 400

7200 50/60 25 – 400

12,470 60 50 – 500

13,800 60 50 – 500

Description Dimensions (A)Inches (mm)

Dimensions (B)Inches (mm)

Approx. WeightLbs (kg)

FigureNo.

Standarddwg no.

kvar 2400 Volt 4160 Volt 4800 Volt

25 25243FKED 25413FKED 25483FKED 24.44 (621) 3.71 (94) 54 (25)

37.5-1

5D10237

50 50243FKED 50413FKED 50483FKED 26.06 (662) 5.34 (136) 59 (27) 37.5-1 5D10237

75 75243FKED 75413FKED 75483FKED 27.68 (703) 6.96 (177) 64 (29) 37.5-1 5D10237

100 100243FKED 100413FKED 100483FKED 29.44 (748) 8.71 (221) 69 (31) 37.5-1 5D10237

125 125243FKED 125413FKED 125483FKED 30.18 (767) 9.46 (240) 76 (35) 37.5-1 5D10237

150 150243FKED 150413FKED 150483FKED 32.68 (830) 11.96 (304) 81 (37) 37.5-1 5D10237

175 175243FKED 175413FKED 175483FKED 33.35 (847) 12.63 (321) 86 (39) 37.5-1 5D10237

200 200243FKED 200413FKED 200483FKED 33.35 (847) 12.63 (321) 92 (42) 37.5-1 5D10237

225 225FKY2432 225FKY4132 225FKY4832 36.06 (916) 18.33 (466) 103 (47) 37.5-1 5D10237

250 250FKY2432 250FKY4132 250FKY4832 36.06 (916) 18.33 (466) 103 (47) 37.5-1 5D10237

275 276FKY2432 275FKY4132 275FKY4832 36.06 (992) 18.33 (466) 114 (52) 37.5-1 5D10237

300 — 300FKY4132 300FKY4832 36.06 (992) 18.33 (466) 114 (52) 37.5-1 5D10237

300 300FKY2432 — — 33.43 (849) 12.70 (323) 149 (68) 37.5-2 5D10239

325 325FKY2432 325FKY4132 325FKY4832 33.43 (849) 12.70 (323) 154 (70) 37.5-2 5D10239

350 350FKY2432 350FKY4132 350FKY4832 33.43 (849) 12.70 (323) 159 (72) 37.5-2 5D10239

375 375FKY2432 375FKY4132 375FKY4832 33.43 (849) 12.70 (323) 165 (75) 37.5-2 5D10239

400 400FKY2432 400FKY4132 400FKY4832 33.43 (849) 12.70 (323) 171 (78) 37.5-2 5D10239

425 425FKY2433 425FKY4133 425FKY4833 39.18 (995) 18.45 (469) 181 (82) 37.5-2 5D10239

450 450FKY2433 450FKY4133 450FKY4833 39.18 (995) 18.45 (469) 192 (87) 37.5-2 5D10239

500 500FKY2433 500FKY4133 500FKY4833 39.18 (995) 18.45 (469) 192 (87) 37.5-2 5D10239

525 525FKY2433 525FKY4133 525FKY4833 39.18 (995) 18.45 (469) 203 (92) 37.5-2 5D10239

550 550FKY2433 550FKY4133 550FKY4833 39.18 (995) 18.45 (469) 214 (97) 37.5-2 5D10239

575 — 575FKY4133 575FKY4833 39.18 (995) 18.45 (469) 214 (97) 37.5-2 5D10239

600 — 600FKY4133 600FKY4833 39.18 (995) 18.45 (469) 214 (97) 37.5-2 5D10239

575 575FKY2433 — — 33.43 (849) 12.70 (323) 248 (113) 37.5-3 5D10241

600 600FKY2433 — — 33.43 (849) 12.70 (323) 254 (115) 37.5-3 5D10241

625 625FKY2433 625FKY4133 625FKY4833 39.18 (995) 18.45 (469) 265 (120) 37.5-3 5D10241

650 650FKY2433 650FKY4133 650FKY4833 39.18 (995) 18.45 (469) 276 (125) 37.5-3 5D10241

675 675FKY2433 675FKY4133 675FKY4833 39.18 (995) 18.45 (469) 287 (130) 37.5-3 5D10241

700 700FKY2433 700FKY4133 700FKY4833 39.18 (995) 18.45 (469) 298 (130) 37.5-3 5D10241

725 725FKY2433 725FKY4133 725FKY4833 39.18 (995) 18.45 (469) 298 (130) 37.5-3 5D10241

750 750FKY2433 750FKY4133 750FKY4833 39.18 (995) 18.45 (469) 298 (130) 37.5-3 5D10241

775 775FKY2433 775FKY4133 775FKY4833 39.18 (995) 18.45 (469) 309 (135) 37.5-3 5D10241

800 800FKY2433 800FKY4133 800FKY4833 39.18 (995) 18.45 (469) 320 (140) 37.5-3 5D10241

825 825FKY2433 825FKY4133 825FKY4833 39.18 (995) 18.45 (469) 331 (145) 37.5-3 5D10241

850 — 850FKY4133 850FKY4833 39.18 (995) 18.45 (469) 331 (145) 37.5-3 5D10241

875 — 875FKY4133 875FKY4833 39.18 (995) 18.45 (469) 331 (145) 37.5-3 5D10241

900 — 900FKY4133 900FKY4833 39.18 (995) 18.45 (469) 331 (1450 37.5-3 5D10241

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Metal-Enclosed — Medium Voltage

Dimensions

Sheet 1661

Dimensions — Medium Voltage UNIVAR Fixed Capacitors

Figure 37.5-1. Drawing No. 5D10237

Figure 37.5-2. Drawing No. 5D10239

Figure 37.5-3. Drawing No. 5D10241

4.50

Solderless Conn. for #10 Solid to #2 Str'd Cond.

Solderless Conn.for #10 Solid to#4 Str'd Cond.

A

RemovableTop Cover

11.34

B

16.5815.62.17

21.08

.25-20 Grd Scr.

(2).500 x .625Slots

21.08

17.15

15.75

(4).562MountingHoles

A

14.50

17.50

19.75

B

.25-20Grd Scr.

Terminal for #14 to 1/0 Cable

RemovableTop Cover

26.75

24.50

A

14.50

NP

21.08

17.15

15.75

(4).562

Holes B

.25-20Grd Scr.

Terminal for #6to 250 kcmil Cable

RemovableTop Cover

Page 40: CH Capacitor

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Metal-Enclosed — Medium Voltage

Dimensions

Sheet 1662

Table 37.5-3. UNIVAR Dimensions —Optional 3 Fuses (2400 – 4800 Volts)

Table 37.5-4. UNIVAR Dimensions — Standard 3 Fuses (6600 – 13,800 Volts)

Description Dimensions (A)Inches (mm)

Dimensions (B)Inches (mm)

Approx. Weight FigureNo.

StandardDwg No.kvar 2400 Volt 4160 Volt 4800 Volt Lbs (kg)

25 50 75

25243FKED350243FKED375243FKED3

25413FKED350413FKED375413FKED3

25483FKED350483FKED375483FKED3

27.68 (703)27.68 (703)27.68 (703)

6.69 (177)6.96 (177)6.96 (177)

64 (29)64 (29)64 (29)

37.5-437.5-437.5-4

5D102385D102385D10238

100125150

100243FKED3125243FKED3150243FKED3

100413FKED3125413FKED3150413FKED3

100483FKED3125483FKED3150483FKED3

29.44 (748)30.18 (767)32.68 (830)

8.71 (221)9.46 (240)11.96 (304)

69 (31)76 (35)81 (37)

37.5-437.5-437.5-4

5D102385D102385D10238

175200225

175243FKED3200243FKED3225FKY24323

175413FKED3200413FKED3225FKY41323

175483FKED3200483FKED3225FKY48323

33.35 (847)33.35 (847)36.06 (916)

12.63 (321)12.63 (321)18.33 (466)

86 (39)92 (42)103 (47)

37.5-437.5-437.5-4

5D102385D102385D10238

250275300

250FKY24323276FKY24323—

250FKY41323275FKY41323300FKY41323

250FKY48323275FKY48323300FKY48323

36.06 (916)36.06 (992)39.06 (992)

18.33 (466)18.33 (466)18.33 (466)

103 (47)114 (52)114 (52)

37.5-437.5-437.5-4

5D102385D102385D10238

300325350

300FKY24323325FKY24323350FKY24323

—325FKY41323350FKY41323

—325FKY48323350FKY4832

33.43 (849)33.43 (849)33.43 (849)

12.70 (323)12.70 (323)12.70 (323)

149 (68)154 (70)159 (72)

37.5-537.5-537.5-5

5D102405D102405D10240

375400425

375FKY24323400FKY24323425FKY24333

375FKY41323400FKY41323425FKY41333

375FKY48323400FKY48323425FKY48333

33.43 (849)33.43 (849)39.18 (995)

12.70 (323)12.70 (323)18.45 (469)

165 (75)171 (78)181 (82)

37.5-537.5-537.5-5

5D102405D102405D10240

450500525

450FKY24333500FKY24333525FKY24333

450FKY41333500FKY41333525FKY41333

450FKY48333500FKY48333525FKY48333

39.18 (995)39.18 (995)39.18 (995)

18.45 (469)18.45 (469)18.45 (469)

192 (87)192 (87)203 (92)

37.5-537.5-537.5-5

5D102405D102405D10240

550575600

550FKY24333——

550FKY41333575FKY41333600FKY41333

550FKY48333575FKY48333600FKY48333

39.18 (995)39.18 (995)39.18 (995)

18.45 (469)18.45 (469)18.45 (469)

214 (97)214 (97)214 (97)

37.5-537.5-537.5-5

5D102405D102405D10240

575600625

575FKY24333600FKY24333625FKY24333

——625FKY41333

——625FKY48333

33.43 (849)33.43 (849)39.18 (995)

12.70 (323)12.70 (323)18.45 (469)

248 (113)254 (115)265 (120)

37.5-637.5-637.5-6

5D102425D102425D10242

650675700

650FKY24333675FKY24333700FKY24333

650FKY41333675FKY41333700FKY41333

650FKY48333675FKY48333700FKY48333

39.18 (995)39.18 (995)39.18 (995)

18.45 (469)18.45 (469)18.45 (469)

276 (125)287 (130)298 (130)

37.5-637.5-637.5-6

5D102425D102425D10242

725750775800

725FKY24333750FKY42333775FKY24333800FKY24333

725FKY41333750FKY41333775FKY41333800FKY41333

725FKY48333750FKY48333775FKY48333800FKY48333

39.18 (995)39.18 (995)39.18 (995)39.18 (995)

18.45 (469)18.45 (469)18.45 (469)18.45 (469)

298 (130)298 (130)309 (135)320 (140)

37.5-637.5-637.5-637.5-6

5D102425D102425D102425D10242

825850875900

————

825FKY41333850FKY41333875FKY41333900FKY41333

825FKY48333850FKY48333875FKY48333900FKY48333

39.18 (995)39.18 (995)39.18 (995)39.18 (995)

18.45 (469)18.45 (469)18.45 (469)18.45 (469)

331 (145)331 (145)331 (145)331 (145)

37.5-637.5-637.5-637.5-6

5D102425D102425D102425D10242

Standard 3 Fuses Dimensions Approx. Weight FigureNo.

StandardDwg No.kvar 6600 Volt 7200 Volt 12,470 Volt 13,800 Volt (A)

Inches(mm)

(B)Inches(mm)

(C)Inches(mm)

(D)Inches(mm)

Lbs. (kg)

50100150

50663FKED3100663FKED3150663FKED3

50723FKED3100723FKED3150723FKED3

50123FKED3100123FKED3150123FKED3

50133FKED3100133FKED3150133FKED3

4.25 (108)4.25 (108)4.25 (108)

45.50 (1156)45.50 (1156)45.50 (1156)

14.46 (367)14.46 (367)14.46 (367)

0.25 (6)0.25 (6)0.25 (6)

198 (90)198 (90)198 (90)

37.5-737.5-737.5-7

5D102435D102435D10243

200250300

200663FKED3250FKY66323300FKY66323

200723FKED3250FKY2323300FKY2323

200123FKED3250FKY12323300FKY12323

200133FKED3250FKY13323300FKY13323

5.62 (143)5.62 (143)5.62 (143)

45.50 (1156)48.50 (1232)53.50 (1359)

14.46 (367)17.46 (443)17.46 (443)

0.25 (6)0.25 (6)0.25 (6)

220 (100)246 (112)246 (112)

37.5-737.5-737.5-7

5D102435D102435D10243

350400450500

350FKY66323400FKY66323——

350FKY2323400FKY2323——

350FKY12323400FKY12323450FKY12323500FKY12323

350FKY13323400FKY13323450FKY13323500FKY13323

5.62 (143)5.62 (143)5.62 (143)5.62 (143)

53.50 (1359)57.25 (1454)57.25 (1454)57.25 (1454)

17.46 (443)22.46 (570)22.46 (570)26.21 (666)

0.25 (6)0.25 (6)0.25 (6)0.25 (6)

246 (112)281 (128)281 (128)336 (153)

37.5-737.5-737.5-737.5-7

5D102435D102435D102435D10243

Page 41: CH Capacitor

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Metal-Enclosed — Medium Voltage

Dimensions

Sheet 1663

Dimensions — Medium Voltage UNIVAR Fixed Capacitors

Figure 37.5-4. Drawing No. 5D10238

Figure 37.5-5. Drawing No. 5D10240

Figure 37.5-6. Drawing No. 5D10242

Figure 37.5-7. Drawing No. 5D10243

4.00

Solderless Conn.for #10 Solid to#4 Str'd Cond.

21.08

15.6216.58

11.34

RemovableTop Cover

A

B

.25-20 Grd Scr.

(2).500 x .625 Slots

A

17.50

14.50

19.75 21.08

15.75

17.15

(4).562MountingHoles

B

.25-20

Grd Scr.

RemovableTop Cover

17.15

21.08

15.75

26.75

24.50

14.50

A

NPNPNP

(4).562Mounting Holes

.25-20Grd Scr.

B

Removable Top Cover

A

CB

D

.250-20Grd. Scr.

16.42

Removable Top Cover

Solderless Conn.for A #10 Solidto A #4 Str'd. Conn.

(2).500 x .625Slots [13 x 16]

25.0824.12

34.00Barriers

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1665

AUTOVAR

Medium Voltage Metal-Enclosed PFC System

Product Description

The AUTOVAR medium voltage automatic power factor capacitor systems are designed for power factor correction in applications where plant power factor can be constant or changing, and an engineered solution is required. These systems can be a fixed amount of capacitance with a disconnect, a number of switched capacitance stages, or a combination of both. The AUTOVAR medium voltage capacitor system can switch stages of capacitance in and out auto-matically based on information col-lected by the power factor controller on the door-in-door control panel.

Applications

Large motors.

Motor control centers.

Branch circuits.

Service entrance.

Utility Customers

Metal-enclosed power factor correc-tion systems are fully assembled, tested and ready for installation. Very little field assembly is required. Installa-tion and maintenance costs for metal-enclosed systems are low compared to pole and rack mounted capacitor banks. Metal-enclosed systems and harmonic filters are less vulnerable to wildlife and airborne contaminants that can cause tracking and faults. In addition, metal-enclosed systems significantly reduce the risks and the associated liability involving untrained personnel. All live parts are contained in a grounded, key interlocked enclosure and no internal hardware is accessible. Metal-enclosed systems are aesthetically pleasing due to their low profile, and can be painted to match the surrounding architecture. These are just some of the reasons more and more utilities are utilizing metal-enclosed capacitor and harmonic filter systems.

Industrial Customers

Large industrial power users can utilize the benefits associated with medium voltage power factor correc-tion and harmonic filtering. Medium voltage solutions usually support the scale and scope of larger services. Medium voltage applications can be found in the following types of indus-tries as examples: automotives, pulp and paper, plastics, petrochemical, and heavy manufacturing. Individual fixed capacitors provide power factor correction directly at the cause of the problem, such as a large horsepower MV motor. Medium voltage systems allow large industrials to correct power factor at or close to the point of common coupling (PCC), where the utility electrical system meets theirs. This allows correction for an entire facility, instead of having to correct at multiple locations. The Cutler-Hammer NEMA 3R design also allows the system to be placed outdoors, saving valuable manufacturing floor space. The savings can be enormous, in materials, installation costs and floor space. In short, medium voltage solutions provide a cost-effective alternative to many local low voltage power factor correction units, while protecting the customer’s entire electrical distribution system.

Commercial Customers

Many commercial customers are purchasing power from their utility at higher voltages today (2.4 kV – 15 kV), and can also take advantage of medium voltage power factor correc-tion systems. These solutions can meet the needs of large office com-plexes, hospitals and universities, among others. The benefits of safety (key interlocking, no exposed live parts, etc.), and aesthetics (low profile, can be painted to match environment) both meet the needs of these applica-tions where there are large numbers of untrained personnel in proximity of electrical equipment.

Features, Benefits and Functions

Benefits

Ease of Installation

Eaton makes installation easy. All sys-tems are completely assembled in the factory, with all equipment pre-wired and pre-tested for easy on-site installa-tion. Only shipping splits must be con-nected in the field. Splice kits connect bus systems, and control wiring is easily connected at each enclosure. Current limiting fuses, contactor assemblies, and the incoming switch assembly can be removed from the enclosure if needed. Line terminals are completely accessible from the front of the system.

Personnel Safety

Positive mechanical isolating switch with visible disconnect completely grounds and isolates the unit from the line connectors. A screened barrier protects personnel from live parts. All medium voltage doors are mechani-cally interlocked with the disconnect switch. Key interlocks are provided standard on all enclosure doors, and can be coordinated with upstream disconnect devices. The low voltage control section has a separate door-in-door design, and is segregated from the medium voltage sections so that an operator can work in that section safely.

Ease of Maintenance

All components are front-accessible, facilitating routine inspection or parts replacement. A viewing window is standard on all compartment doors.

Page 44: CH Capacitor

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1666

Flexibility

Systems are expandable. The cus-tomer can add stages in the future by connecting the phase bus in the field via splice kits. Structures can be bolted together in the field.

Voltages from 2400 V – 34.5 kV.

Reactive power ratings through 30 MVar.

Harmonic tuned, de-tuned, or multi-tuned filter designs available.

Externally fused capacitor units standard.

Blown fuse indication standard.

Integral load interrupter switch, NEMA 2 hole termination pad, or VCP-TLC draw-out type circuit breaker.

Delivered fully assembled, tested and ready for interconnection.

Integral protection and control system.

Top or bottom cable entry.

Earthing switch.

60 kV BIL up to 4.8 kV.

95 kV BIL from 4.8 kV to 14.4 kV.

125 kV BIL from 14.4 kV to 27 kV.

170 kV BIL above 27 kV.

Up to 12 automatic switched capacitor stages.

Warning labels.

Meets the following requirements:

ANSI

IEEE

NEC

NESC

Main incoming fuses are rated 63 kAIC to provide main bus protection, as well as back-up protection for the capacitor systems.

Standard Features — AUTOVAR MV

Enclosure

Free-standing, 11-gauge steel con-struction with 3-point padlockable latching handles and stainless steel hinges. The enclosure is painted with a corrosion-resistant ANSI 61 light gray enamel paint as standard. Other colors are available as an option. NEMA 3R construction is standard, NEMA 4X is available as an option.

Enclosure is UL/CSA approved.

See

Figure 37.6-2

for dimensions and elevations.

See

Figure 37.6-1

for a typical single-line drawing.

Medium Voltage PFC Enclosure

Bottom Plate Incoming Cutout Provided Standard

Load Interrupter Air Disconnect Switch

Integral disconnect switch, externally operated, mechanically chain driven with visible blades is available as per NEC requirements. Disconnect switch is mechanically interlocked with the ground switch, and with the customer’s upstream device (if applicable). Incoming section is front-accessible only for safety, and screens isolate live connections from the user.

Incoming Section with Protective Screens

Incoming Section with Screens Removed

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1667

Ground Switch

A ground switch is provided to ground the load-side terminals of the incoming switch (or MLO) for safety during maintenance. Optional con-trols are available to permit closing contactors after the grounding switch has been closed to ground capacitors immediately (rather than waiting five (5) minutes for full discharge).

Ground Switch in the Incoming Section

Vacuum Switches

On multi-stage capacitor systems, each stage is controlled by low main-tenance vacuum contactors (2.4 – 7.2 kV) or vacuum switches (7.2 – 15 kV) depending on the application (see below). Oil switches are also available.

15 kV Switched Capacitor Stage Enclosure

Vacuum Contactors

On multi-stage capacitor systems, each stage is controlled by low main-tenance vacuum contactors (2.4 – 7.2 kV) or vacuum switches (7.2 – 15 kV) depending on the application (see below). Oil switches are also available.

5 kV Switched Capacitor Stage Enclosure

Individual Capacitor Fusing

Each capacitor is externally fused with current limiting fuses. Fuses are equipped with blown fuse indication. Internally fused capacitors are also available as an option.

Each Capacitor Section is Individually Fused

Environmental Controls

Exhaust fans: Exhaust fans are pro-vided for forced air ventilation of all enclosures as standard.

Thermal controls: Thermostats are included as standard to help main-tain an acceptable internal environ-ment for all components.

Space heaters: Space heaters are provided to control moisture and humidity inside all enclosures.

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For more information visit:

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CA08104001E

June 2006

Power Factor Capacitors and Harmonic Filters

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1668

Capacitors

Low loss, double-bushing capacitors that meet or exceed IEC 871, IEEE Std. 18 and CSA standards are supplied. Capacitors are connected in an ungrounded wye as standard, but can be connected delta as well. The dielectric fluid is environmentally friendly, biodegradable, non-PCB. Capacitor units are equipped with internal discharge resistors which reduce the residual voltage to less than 50 volts within 5 minutes of de-energization.

Harmonic Filtering

Eaton’s Cutler-Hammer medium voltage harmonic filter systems are designed for industrial, utility and commercial power systems to improve power factor, reduce har-monic distortion, increase system capacity and reduce I2R losses. The reactors are typically tuned to the 4.7th harmonic, to mitigate the most damaging 5th level harmonic. This is the most common harmonic produced by six pulse variable speed drives. These filters are designed to the unique specifications of each electrical distribution system. Medium voltage capacitor banks can also be configured with de-tuned harmonic filters, typically set to the 4.2nd harmonic. This helps avoid harmonic resonance problems, provides harmonic filtering, and avoids the overloading that is possible with an improperly applied filter.

Harmonic Filter Capacitor Stage Enclosure

Key Interlock System

The key interlock system controls the sequential operation of the load break switch (or circuit breaker) and the ground switch to permit safe entry into the capacitor system. All capacitor stage enclosures are also interlocked with the ground switch. If applicable, the customer’s upstream disconnect device can be interlocked as well. See

Figure 37.6-1

for key interlock opera-tion on a typical single-line drawing.

Key Interlock System Ensures Safety in Main and Stage Doors

Blown Fuse Detection System

A visual pop-up blown fuse detection system is provided as standard.

Control Power Transformer

A fused control power transformer rated for 1.75 kVA is provided for pro-tection, control and operation of the capacitor or harmonic filter system.

Transient Voltage Surge Suppression

A TVSS unit is supplied standard for protection of all low voltage controls in the system.

CPT and TVSS Provide Power and Protection for Control Section

Control Panel

A door-in-door NEMA 3R swing-out control panel is provided on the main incoming structure as standard. This unit includes a viewing window so that all controls and information can be viewed without opening the panel. All low voltage controls and logic are accessible from the front of the system, and are isolated from the medium voltage section.

Included:

PFC controller.

Ammeter with switch (for mainte-nance and diagnostic purposes).

Stage ON/OFF pilot lights.

Manual stage operation switches.

Any special controls requested by the customer.

Door-in-Door Control Panel

Page 47: CH Capacitor

CA08104001E For more information visit:

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Power Factor Capacitors and Harmonic Filters

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1669

Solid-State Controller

Automatic metal-enclosed capacitors and harmonic filter systems come equipped with an automatic controller that switches each capacitor stage based upon power factor. The cus-tomer simply programs in the target PF to meet. The controller analyzes current PF, the size of each stage, and turns on and off stages to meet the customer’s programmed target. The controller has alarms such as power factor out of range, high harmonic voltage content and loss of power.

Up to 12 steps of capacitance can be designed into any system. Customers can note this feature when designing for future expansions.

Communications

Communications of power factor data via RS-232, RS-485 or Modbus

is available as an option. Communicated information from the controllers:

Voltage.

Current.

Target power factor.

Current power factor.

Active power.

Apparent power.

Reactive power.

Number of steps in the circuit.

All alarm status.

All counters.

Time and date.

Inrush Reactors

Inrush reactors are provided as stan-dard on all switched (non-harmonic filtered) capacitor systems for protec-tion against transients from back-to-back switching. Reactors in harmonic filtered applications provide this same protection.

Inrush Reactor for Back-to-Back Switching

Bus

Continuous 1/4” x 2” silver-plated copper bus rated 600 A standard is provided throughout the line-up for easy interconnection, field installation and future expansion.

Phase Bus

Continuous 1/4” x 1” silver-plated copper ground bus rated 300 A is provided throughout the line-up for easy interconnection, field installation and future expansion. Ground studs are available in all structures for customer connection.

Continuous Ground Bus with Pad in Each Section

Additional Standard Controls and Features

Three-phase manual current moni-toring, for maintenance purposes.

Unbalance alarm and unit shutdown on all wye-connected systems.

Unit alarm and isolated fail-safe contacts for customer use on all sys-tems. Controls allow sufficient time (5 minutes) to allow the capacitors time to discharge before re-energi-zation can occur.

Overvoltage alarm.

Temperature alarms on all harmonic filter units.

Manual stage controls.

Page 48: CH Capacitor

37.6-6

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CA08104001E

June 2006

Power Factor Capacitors and Harmonic Filters

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Metal-Enclosed — Medium Voltage

General Description

Sheet 1670

Medium Voltage Metal-Enclosed PFC System

Optional Features

Fixed Capacitor Systems

For standard fixed capacitor applica-tions where the customer requires a disconnect, Eaton can provide a unit with a main load break switch, fuse, inrush reactor, and 3-phase fixed delta capacitor cell. This system can be pro-vided at the following ratings:

2.4 – 4.8 kV, up to 900 kvar, 94 H x 45 W x 49 D inches (2387.6 H x 1143.0 W x 1244.6 D mm), NEMA 3R enclosure.

5.5 – 14.4 kV, up to 2400 kvar, 94 H x 90 W x 49 D inches (2387.6 H x 2286.0 W x 1244.6 D mm), NEMA 3R enclosure (includes a ground switch).

See

Figure 37.6-3

and

Figure 37.6-5

for structure outlines. See

Figure 37.6-4

and

Figure 37.6-6

for one-line drawings.

Harmonic Filter Reactors

Iron core reactors provide the neces-sary reactance to tune the capacitor system to a desired frequency. Stan-dard tuning is the 4.7th harmonic. Other tuning frequencies, as well as multi-tuned systems, are also available.

Harmonic Filter

Lightning Arresters

Optional heavy-duty distribution class lightning arresters protect the capacitor system from lightning and switching transients.

IQ Digital Power Meter

A highly advanced digital power meter (IQ Analyzer or Power Xpert

series), suited to many power and control applications, can be supplied as an option. This solid-state meter can take the place of numerous meters and control circuits to meet your power and energy monitoring requirements. Communications options are also available.

IQ Analyzer 6600

Circuit BreakerThe VCP-TLC drawout type and VCP-TRLC fixed type medium voltage circuit breakers are available with short circuit breaking current ratings up to 25 kV and continuous current ratings up to 1200 amperes. The linear actuator mechanism provides for a high degree of reliability with low maintenance needs.

Predictive Diagnostics/Partial Discharge DetectionSensors can be mounted in medium voltage power factor correction sys-tems to detect partial discharges in an enclosure and/or adjoining enclosures. They can be connected to an Insul-Gard� monitor mounted in the field, or mounted in the MV PFC enclosure. The InsulGard monitor can ascertain the relative condition of insulation in the electrical distribution system, the deterioration of which is the leading cause of electrical failures. With the InsulGard, there is no need to take equipment out of service or send per-sonnel to conduct tests. It constantly monitors its sensors and alerts the operator of a potential problem.

Partial Discharge Sensor Connection Point

Enclosure OptionsNEMA 4X construction for highly caus-tic environments or areas requiring wash down.

Other plant colors available.

Alarm StrobeStrobe light can be provided for visual indication of faults and alarms.

Current TransformerAutomatic systems can be shipped with a customer-specified current transformer for mounting in the field.

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Metal-Enclosed — Medium VoltageTechnical Data

Sheet 1671

Technical Data

Figure 37.6-1. Typical Medium Voltage Automatic Power Factor Correction Single-Line Drawing

Alarm or Trip

CapacitorCapacitorCapacitorDelta/Wye Delta/Wye Delta/Wye

Fuse

Reactor

ContactorVacuum

59

TransformerUtility

Utility Line

A-Phase 1

CT

Plant Loads

Feeder Breaker K0

B & CTap On

1-Phase

MainCPT

ControllerPower Factor

BLR-CM

K1

K1K-K Interlock

SwitchGround

Switch

K0

K-K Interlock

ControlS3S2S1

3

CT1 46 Relays

C1C

S1

S1

EnclosureDoor

C1

K-K Interlock (Optional)

AMAS

Main Breaker

Page 50: CH Capacitor

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June 2006

Power Factor Capacitors and Harmonic Filters

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Metal-Enclosed — Medium VoltageLayout Dimensions

Sheet 1672

Figure 37.6-2. Typical Engineered Metal-Enclosed Power Factor Correction System Dimensional Data

KE KEEP OUT

DANGERHIGH VOLTAGE

DANGER

KEEP OUTHIGH VOL

KEEP OU

DANGE

8.23

Ground

Main

19.00

19.00

IncomingConduitArea

Floor Plan

49.10

Right Side ElevationFront

90.3392.56

48.27

1.00

(Typ)1.50

(Typ)45.00

witch

witch

ipping Split

13.00

19.00

38.0015.00

4.00

16.00

Top View

Top EntryControlConduit

4" x 4"

Top EntryMV Conduit

Area

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Power Factor Capacitors and Harmonic Filters

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Metal-Enclosed — Medium VoltageLayout Dimensions

Sheet 1673

Figure 37.6-3. Fixed PFC Outline Drawing — 2 Structure

Figure 37.6-4. Fixed PFC One-Line Drawings

Figure 37.6-5. Fixed PFC Outline Drawing — 1 Structure

Figure 37.6-6. Fixed PFC One-Line Drawings

Cutler-Hammer is a federally registered trademark of Eaton Corporation. NEMA is the registered trademark and service mark of the National Electrical Manufacturers Association. National Electrical Code and NEC are registered trademarks of the National Fire Protection Association, Quincy, Mass. UL is a federally registered trademark of Underwriters Laboratories Inc. CSA is a registered trademark of the Canadian Standards Association. Modbus is a registered trademark of Modicon, a division of Schneider Electric Industries SA.

19.00

91

levation Right Side Elevation

8 Tiedown Points Per EnclosureFront & Rear

For 1/2-Inch HardwareFloor Plan

48.2719.00Conduit

Area

Incomingd i

15.00

Estimated Weight: 3,400 lbs

49.10

19.00

16.00

13.00

4.00 38.00

Top View

Top EntryControlConduit

4" x 4"

Top EntryMV Conduit

Area

5.5 kV – 14.4 kV Fixed Capacitor Bank

Control Schematic Single-Line

From Customer's 120 Vac Source 120 Vac/20 A, 1-PH, 60 Hz

From Customer's Feeder Breaker 5.5 kV – 14.4 kV, 3-Phase

KO-KO Interlock at Customer Breaker

Main Switch

Fuse 63 kAIC15.5 kV

K0

K0

K1

K1

S1

S1

Ground Switch

Inrush Reactor

Enclosure Door

Capacitor Bank

Fans: 115 V/60 Hz/0.5 A

Space Heater: 120 V/60 Hz/350 W

1L

1L 1NGND BUS

1 1

TB1-1L TB1-1N TB1-G

#12 (BK)

#12 (BK)

TSH1

H1

40ºF 80ºF

F1F11

Fans

F12

HTR1

TSF1

#12 (WH)

20 A 120 V/10 KAIC

1N G

4.00

8.2311.42

8 Tiedown Points Per EnclosureFront & Rear

For 1/2-Inch Hardware

(Typ)

(Typ)

1.50

45.00

19.001

19.001

IncomingConduitArea

Floor Plan

49.10

Right Side ElevationFront Elevation

0.3392.56

48.27

900 kvar / 2.4 kV – 4.8 kV Fixed Capacitor Bank

Estimated Weight: 1,700 lbs

19.00

16.00

15.00 13.0038.00

Top View

Top Entry MV Conduit AreaTop Entry

ControltConduit4" x 4"

2.4 kV – 4.8 kV Fixed Capacitor Bank

Control Schematic Single-Line

From Customer's Feeder Breaker 2.4 kV – 4.8 kV, 3-Phase

From Customer's 120 Vac Source 120 Vac/20 A, 1-PH, 60 Hz

KO-KO Interlock at Customer Breaker

Main Switch

Fuse 63 kAIC5.5 kV

K0

K1

K0

K1

Inrush Reactor

Enclosure Door

Capacitor Bank

Fans: 115 V/60 Hz/0.5 A

Space Heater: 120 V/60 Hz/350 W

1L 1NGND BUS

1 1

TB1-1L TB1-1N TB1-G

#12 (BK)

40ºF 80ºF

H1 F1

Fans

F11

F12

HTR1

TSH1 TSF1

#12 (BK) #12 (WH)

20 A 120 V/10 kAIC

1L 1N G

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June 2006

Power Factor Capacitors and Harmonic Filters

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Sheet 1674

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