01.4sm.1801a undervoltage device for powlvac-nd circuit

01.4SM.1801A Undervoltage Device for PowlVac-ND® Circuit Breakers

48VDC & 125VDC(For PowlVac-ND® Circuit Breakers manufactured

after September 2014)

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Powered by Safety®

Undervoltage Device for PowlVac-ND® Circuit Breakers 48VDC & 125VDC

01.4SM.1801A

Contact Information

Powell Electrical Systems, Inc. [email protected]

Service Division PO Box 12818

Houston, Texas 77217-2818

Tel: 713.944.6900 Fax: 713.948.4569

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01.4SM.1801A

Signal Words

As stated in ANSI Z535.4-2007, the signal word is a word that calls attention to the safety sign and designates a degree or level of hazard seriousness. The signal words for product safety signs are “Danger”, “Warning”, “Caution”, and “Notice”. These words are defined as:

DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

! DANGER

! WARNINGWARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

! CAUTIONCAUTION, used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

CAUTION, used without the safety alert symbol, is used to address practices not related to personal injury.

CAUTION

NOTICENOTICE is used to address practices not related to personal injury.

Qualified Person

For the purposes of this manual, a qualified person, as stated in NFPA 70E®, is one who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to recognize and avoid the hazards involved. In addition to the above qualifications, one must also be:

1. trained and authorized to energize, deenergize, clear, ground, and tag circuits and equipment in accordance with established safety practices.

2. trained in the proper care and use of personal protective equipment (PPE) such as rubber gloves, hard hat, safety glasses or face shields, flash clothing, etc., in accordance with established safety practices.

3. trained in rendering first aid if necessary.

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Undervoltage Device for PowlVac-ND® Circuit Breakers 48VDC & 125VDC

01.4SM.1801A

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01.4SM.1801A

Ch 1 General Information ................................................................................................1A. Scope ...............................................................................................................................................................2B. purpoSe ............................................................................................................................................................2c. InStructIon BulletInS AvAIlABle electronIcAlly ....................................................................................................2

Ch 2 Safety .......................................................................................................................3A. SAfe Work condItIon .........................................................................................................................................3B. SAfety GuIdelIneS ...............................................................................................................................................3c. GenerAl ............................................................................................................................................................4d. SpecIfIc .............................................................................................................................................................4e. X-rAyS .............................................................................................................................................................5f. SAfety lABelS ....................................................................................................................................................5

Ch 3 Equipment Description ............................................................................................6A. GenerAl ............................................................................................................................................................6

Ch 4 Installation ...............................................................................................................7A. cAlIBrAtInG the replAcement/Add-on 48vdc undervoltAGe ASSemBly .................................................................7B. removInG the old 48vdc undervoltAGe ASSemBly And InStAllInG the replAcement

48vdc undervoltAGe ASSemBly ........................................................................................................................81) Removing the Old UV Assembly .......................................................................................................................................... 82) Installing the Replacement UV Assembly .......................................................................................................................... 9

c. cAlIBrAtInG the replAcement/Add-on 125vdc undervoltAGe ASSemBly ........................................................... 10d. removInG the old 125vdc undervoltAGe ASSemBly And InStAllInG the replAcement

125vdc undervoltAGe ASSemBly ................................................................................................................... 111) Removing the Old UV Assembly ........................................................................................................................................122) Installing the Replacement UV Assembly ........................................................................................................................12

e. teStInG the replAcement undervoltAGe ASSemBly .............................................................................................. 13f. InStAllInG An Add-on undervoltAGe ASSemBly ................................................................................................. 15G. teStInG An Add-on undervoltAGe ASSemBly ..................................................................................................... 15

Contents

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01.4SM.1801AUndervoltage Device for PowlVac-ND® Circuit Breakers 48VDC & 125VDC

Figures

Figure 1 Replacement 48VDC Undervoltage Device Assembly with Tools Required ........................................................................................7

Figure 2 Relay Time Delay - 48VDC ..............................................................................7Figure 3 Trip Arm ..........................................................................................................8Figure 4 Removing Button Head Screws from Circuit Breaker Top .............................8Figure 5 Removing Circuit Breaker Top .......................................................................8Figure 6 Insulator Support Channel ............................................................................9Figure 7 Jackshaft Collar .............................................................................................9Figure 8 Replacement 125VDC Undervoltage Device Assembly

with Tools Required ......................................................................................10Figure 9 Relay Time Delay - 125VDC ..........................................................................11Figure 10 Trip Arm ........................................................................................................11Figure 11 Removing Right Side Connecting Rod .........................................................11Figure 12 Insulator Support Channel ..........................................................................12Figure 13 Jackshaft Collar ...........................................................................................12Figure 14 Test Cabinet with Umbilical Cord .................................................................14Figure 15 Compressing Solenoid Plunger & Tightening Jackshaft Collar ..................14Figure 16 Solenoid Plunger in Place with Jackshaft Collar Tightened .......................14Figure 17 Auxiliary Switch to UV Jumper Illustration .................................................16

Tables

Table A 48VDC Relay Dial Settings ....................................................................................7Table B 125VDC Relay Dial Settings ................................................................................10

Powered by Safety® 1General Information

01.4SM.1801A

Ch 1 General Information

Powell reserves the right to discontinue and to change specifications at any time without incurring any obligation to incorporate new features in products previously sold.

NOTICE

! WARNINGThe equipment described in this document may contain high voltages and currents which can cause serious injury or death.

The equipment is designed for use, installation, and maintenance by knowledgeable users of such equipment having experience and training in the field of high voltage electricity. This document and all other documentation shall be fully read, understood, and all warnings and cautions shall be abided by. If there are any discrepancies or questions, the user shall contact Powell immediately at 1.800.480.7273.

! WARNINGBefore any adjustment, servicing, part replacement, or any other act is performed requiring physical contact with the electrical working components or wiring of this equipment, the power supply must be disconnected. Failure to follow this warning may result in injury or death.

NOTICEThe information in this instruction bulletin is not intended to explain all details or variations of the Powell equipment, nor to provide for every possible contingency or hazard to be met in connection with installation, testing, operation, and maintenance of the equipment. For additional information and instructions for particular problems, which are not presented sufficiently for the user’s purposes, contact Powell at 1.800.480.7273.

Powered by Safety®2 General Information


A. Scope

The information in this service manual describes the following Undervoltage Device:

• 50028G21P 48VDC• 50028G20P 125VDC

This device can be used in the following circuit breakers:

• PowlVac-ND® 5kV

B. purpoSe

The information in this service manual is intended to provide information required to properly install the undervoltage device described in Ch 1 General Information, A. Scope.

This service manual provides:

1. Safety guidelines

2. Instructions for installation and placing the undervoltage device into service

3. Illustrations, photographs, and description of the undervoltage device

The illustrations contained in this document may not represent the exact construction details of each particular type of undervoltage device. The illustrations in this document are provided as general information to aid in showing component locations only.

All illustrations and photos are shown using deenergized equipment.

! WARNINGBe sure to follow the appropriate safety precaution while handling any of the equipment. Failure to do so may result in serious injury or death.

To the extent required, the products described herein meet the applicable ANSI, IEEE, and NEMA Standards; however, no such assurance is given with respect to local codes and ordinances which may vary greatly.

c. Service MAnuAlS AvAilABle electronicAlly

For more information visist www.powellind.com. To contact the Powell Service Division call 1.800.480.7273 or 713.944.6900, or email [email protected].

http://www.powellind.com

http://[email protected]

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01.4SM.1801A

Ch 2 Safety

A. SAfe Work condition

The information in Section A is quoted from NFPA 70E 2012 - Article 120, 120.1 Establishing an Electrically Safe Work Condition.

120.1 Process of Achieving an Electrically Safe Work Condition

1. Determine all possible sources of electrical supply to the specific equipment. Check applicable up-to-date drawings, diagrams, and identification tags.

2. After properly interrupting the load current, OPEN the disconnecting device(s) for each source.

3. Wherever possible, visually verify that all blades of the disconnecting devices are fully OPEN or that drawout type circuit breakers are withdrawn to the fully disconnected position.

4. Apply lockout/tagout devices in accordance with a documented and established policy.

5. Use an adequately rated voltage detector to test each phase conductor or circuit part to verify they are deenergized. Test each phase conductor or circuit part both phase-to-phase, and phase-to-ground. Before and after each test, determine that the voltage detector is operating satisfactorily.

Informational Note: See ANSI/ISA-61010-1 (82.02.01)/UL 61010-1, Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use - Part 1: General Requirements, for rating and design requirements for voltage measurement and test instruments intended for use on electrical systems 1000 V and below.

6. Where the possibility of induced voltages or stored electrical energy exists, ground the phase conductors or circuit parts before touching them. Where it could be reasonably anticipated that the conductors or circuit parts being deenergized could contact other exposed energized conductors or circuit parts, apply ground connecting devices rated for the available fault duty.

B. SAfety GuidelineS

Study this maintenance procedure and all other associated documentation before installing the undervoltage device.

Each user has the responsibility to instruct and supervise all personnel associated with usage, installation, operation, and maintenance of this equipment on all safety procedures. Furthermore, each user has the responsibility of establishing a safety program for each type of equipment encountered.

It is mandatory that the following rules be observed to ensure the safety of personnel associated with usage, installation, operation, and maintenance of these circuit breakers.

The safety rules in this service manual are not intended to be a complete safety program. The rules are intended to cover only some of the important aspects of personnel safety related to the undervoltage device.

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c. GenerAl

1. Only supervised and qualified personnel trained in the usage, installation, operation, and maintenance of the circuit breaker shall be allowed to work on this equipment. It is mandatory that this service manual and any supplements be studied, understood, and followed.

2. Maintenance programs must be consistent with both customer experience and manufacturer’s recommendations, including service advisories and instruction bulletin(s). A well planned and executed routine maintenance program is essential for circuit breaker’s reliability and safety.

3. Service conditions and circuit breaker applications shall also be considered in the development of safety programs. Variables include ambient temperature; humidity; actual continuous current; thermal cycling; number of operations; interrupting duty; and any adverse local conditions including excessive dust, ash, corrosive atmosphere, vermin and insect infestations.

d. Specific

1. DO NOT WORK ON AN ENERGIZED CIRCUIT BREAKER. If work must be performed on a circuit breaker, remove it from service and remove it from the metal-clad switchgear.

2. DO NOT WORK ON A CIRCUIT BREAKER WITH THE CONTROL CIRCUIT ENERGIZED.

3. EXTREME CARE MUST BE EXERCISED TO KEEP ALL PERSONNEL, TOOLS, AND OTHER OBJECTS CLEAR OF MECHANISMS WHICH ARE TO BE OPERATED, DISCHARGED, OR RELEASED. These circuit breakers utilize stored energy mechanisms. These mechanisms must be serviced only by skilled and knowledgeable personnel capable of releasing each spring load in a controlled manner. Detailed information regarding these mechanisms is found in this service manual.

4. DO NOT ATTEMPT TO CLOSE THE CIRCUIT BREAKER MANUALLY ON AN ENERGIZED CIRCUIT.

5. DO NOT USE AN OPEN CIRCUIT BREAKER AS THE SOLE MEANS OF ISOLATING A HIGH VOLTAGE CIRCUIT. For complete isolation, the circuit breaker shall be in the disconnected position or shall be withdrawn completely.

6. ALL COMPONENTS SHALL BE DISCONNECTED BY MEANS OF A VISIBLE BREAKER AND SECURELY GROUNDED FOR SAFETY OR PERSONNEL PERFORMING MAINTENANCE OPERATIONS ON THE CIRCUIT BREAKERS.

7. Interlocks are provided to ensure the proper operating sequences of the circuit breakers and for the safety of the user. If for any reason an interlock does not function as described, do not make any adjustments, modifications, or deform the parts. DO NOT FORCE THE PARTS INTO POSITION. CONTACT POWELL FOR INSTRUCTIONS.

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01.4SM.1801A

e. X-rAyS

When high voltage is applied across the contacts of a vacuum interrupter, there is the possibility of generation of X-rays. The intensity of the X-radiation is dependent on the peak voltage and the contact gap. At the normal operating voltage for this type of equipment, the radiation levels are negligible. At the voltages specified for testing, test personnel shall be in front of the circuit breaker such that the two layers of steel used in the frame and front cover construction are between the test personnel and the vacuum interrupters, and that the test personnel be no closer than one meter (3’) from the front of the circuit breaker. THE CIRCUIT BREAKER SHALL BE EITHER FULLY OPEN OR FULLY CLOSED WHEN MAKING HIGH POTENTIAL TESTS. DO NOT TEST WITH CONTACTS PARTIALLY OPEN.

f. SAfety lABelS

The equipment described in this document has DANGER, WARNING, CAUTION, and instruction labels attached to various locations. All equipment DANGER, WARNING, CAUTION, and instruction labels shall be observed when the circuit breaker is handled, operated or maintained.

NOTICEWarning and Caution labels are located in various places in and on the switchgear and on the circuit breaker removable element. Always observe these warnings and caution labels. Do NOT remove or deface any of these warning/caution labels.

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Ch 3 Equipment Description

A. GenerAl

The undervoltage assembly (UV) is located in the center part of the mechanism area just to the right of the main closing spring.

! CAUTIONEnsure that the control circuits are deenergized and the circuit breaker is deenergized, disconnected by means of a visible break, and securely grounded. Do NOT start to work on a closed circuit breaker or a circuit breaker with the main closing spring charged.

The undervoltage device assembly consists of the following:

• Undervoltage Device• Jackshaft Collar• 8/32” x 5/8” socket head screw (4)• 5/16”-18 x ¾” Hex head bolt (2)• 5/16” Flat Washers (2)• 5/16” Lock Washers (2)• Trip Arm• Auxiliary Switch to Undervoltage (UV)

Jumper

Tools required (furnished by customer):

• Flat Head Screwdriver• Socket Wrench• 5/32” Allen Wrench• 9/64” Allen Wrench• ¾” Socket• ½” Socket• 7/16” Socket• Torque Wrench

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01.4SM.1801A

Ch 4 Installation

A. cAliBrAtinG the replAceMent/Add-on 48vdc undervoltAGe ASSeMBly

Figure 1 Replacement 48VDC Undervoltage Device Assembly with Tools Required

The replacement/add-on 48VDC Undervoltage Device is preset to the correct relay settings before being shipped from the factory. Prior to installation refer to Table A 48VDC Relay Dial Settings to ensure the relay dials are in the following positions (Figure 2):

Table A 48VDC Relay Dial SettingsDial SettingStart “0”

Max ~90%

Min ~60%

Delay “0”

Function “U”

Perform the following steps prior to installation of the replacement/add-on undervoltage device assembly.

1. Ensure the circuit breaker is in the OPEN position and all springs are DISCHARGED.

2. Remove the front cover of the circuit breaker.

3. Remove the escutcheon plate.4. Refer to the “Maintenance” chapter of the

circuit breaker instruction bulletin and follow the instructions to remove the main closing spring.

5. When replacing an old style UV assembly (manufactured prior to May 2007), remove the old trip arm, 50358P01 and replace it with the new trip arm, 50183P01 (Figure 3).

Figure 2 Relay Time Delay - 48VDC

a. “Start” Dialb. “Max” Dialc. “Min” Diald. “Delay” Diale. “Function” Dial

a

b

c

d

e

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Figure 3 Trip Arm

a

a. Trip Arm

B. reMovinG the old 48vdc undervoltAGe ASSeMBly And inStAllinG the replAceMent 48vdc undervoltAGe ASSeMBly

Prior to replacing the UV Assembly it will be necessary to remove the circuit breaker top and the main closing spring. Refer to IB-77000A, Ch 5 Maintenance, B. MechAniSM AreA, 3) Closing Spring Removal for closing spring removal.

Perform the following step to remove the circuit breaker top:

1. Remove the circuit breaker top by removing the four (4) button head screws (Figure 4, a).

Figure 4 Removing Button Head Screws from Circuit Breaker Top

a

a. (4) Button Head Screws

Figure 5 Removing Circuit Breaker Top

Note: Removal of the right side connecting rod may also be necessary to access the undervoltage device location (Figure 11, a).

1) Removing the Old UV Assembly

a. Using a 5/32” Allen wrench, unscrew the trip arm from the secondary trip prop shaft.

b. Remove the secondary trip prop reset spring from the trip arm but leave the spring connected to the mechanism. It will be reattached to the new trip arm.

c. Disconnect the UV wires from the circuit breaker harness.


01.4SM.1801A

d. Remove the UV assembly from the insulator support channel by using a ½” socket.

2) Installing the Replacement UV Assembly

Note: When replacing all hardware, use LOCTITE 243 or equal on the threads. When adding/replacing a new style UV assembly (manufactured on or after May 2007) the existing trip arm should NOT be replaced.

Perform the following to install the replacement UV assembly:

a. Install the replacement UV assembly device ensuring that it is in full contact with the mounting surface of the insulator support channel (Figure 6, a). Attach the UV using the two 5/16”-18 x ¾” HEX head bolts, flat washers, and lock washers. Tighten the bolts to 13-14 ft-lbs.

Figure 6 Insulator Support Channel

a

a. Insulator Support Channel

b. Connect the wire lead on the UV assembly to the wire lead on the circuit breaker harness by matching the wire tag numbers.

c. Using 9/64” Allen wrench, install the jackshaft collar to the jackshaft with the hardware supplied (4 - 8/32 x 5/8 socket cap screw). Tighten all four screws equally, allowing the collar to slide along the jackshaft (Figure 7).

Figure 7 Jackshaft Collar

a

a. Jackshaft Collar

d. Slide the collar assembly along the jackshaft until the operating link (Figure 15, b) slot is aligned and engages with the rivet (Figure 15, c) on the rocker arm. Secure the collar to the jackshaft just enough that it will not spin when depressing the rocker arm.

e. Press the rocker arm (Figure 15, a) causing it to pivot and compress the spring on the solenoid plunger. While holding this position, rotate the collar up until the slot on the operating link of the collar engages with the rocker arm rivet. Securely tighten the four screws holding the jackshaft collar halves together. Once the collar is secure, the solenoid plunger should remain completely depressed (Figure 16). If it is not, redo step e until complete.



f. Reinstall the connecting rod, if removed, using new X-Washer to secure in place.

g. Refer to the Maintenance chapter of the circuit breaker instruction bulletin and reverse the instructions for removing the main closing spring and reinstall the main closing spring.

h. Test the UV assembly per Ch 4 Installation, e. teStinG the replAceMent undervoltAGe ASSeMBly.

c. cAliBrAtinG the replAceMent/Add-on 125vdc undervoltAGe ASSeMBly

Figure 8 Replacement 125VDC Undervoltage Device Assembly with Tools Required

The replacement/add-on 48VDC Undervoltage Device is preset to the correct relay settings before being shipped from the factory. Prior to installation refer to Table B 125VDC Relay Dial Settings to ensure the relay dials are in the following positions (Figure 9):

Table B 125VDC Relay Dial SettingsDial SettingStart “0”

Max ~20%

Min ~20%

Delay “0”

Function “U”

Perform the following steps prior to installation of the replacement/add-on undervoltage device assembly.

1. Ensure the circuit breaker is in the OPEN position and all springs are DISCHARGED.

2. Remove the front cover of the circuit breaker.

3. Remove the escutcheon plate.4. Refer to the “Maintenance” chapter of the

circuit breaker instruction bulletin and follow the instructions to remove the main closing spring.

5. When replacing an old style UV assembly (manufactured prior to May 2007), remove the old trip arm, 50358P01 and replace it with the new trip arm, 50183P01 (Figure 10).


01.4SM.1801A

Figure 9 Relay Time Delay - 125VDC

a. “Start” Dialb. “Max” Dialc. “Min” Diald. “Delay” Diale. “Function” Dial

a

b

c

d

e

Figure 10 Trip Arm

a

a. Trip Arm

d. reMovinG the old 125vdc undervoltAGe ASSeMBly And inStAllinG the replAceMent 125vdc undervoltAGe ASSeMBly

Prior to replacing the UV Assembly it will be necessary to remove the circuit breaker top and the main closing spring. Refer to IB-77000A, Ch 5 Maintenance, B. MechAniSM AreA, 3) Closing Spring Removal for closing spring removal.

Perform the following step to remove the circuit breaker top:

1. Remove the circuit breaker top by removing the four (4) button head screws (Figure 4, a).

Note: Removal of the right side connecting rod may also be necessary to access the undervoltage device location (Figure 11, a).

Figure 11 Removing Right Side Connecting Rod

a

a. Connecting Rod



1) Removing the Old UV Assembly

a. Using a 5/32” Allen wrench, unscrew the trip arm from the secondary trip prop shaft.

b. Remove the secondary trip prop reset spring from the trip arm but leave the spring connected to the mechanism. It will be reattached to the new trip arm.

c. Disconnect the UV wires from the circuit breaker harness.

d. Remove the UV assembly from the insulator support channel by using a ½” socket.

2) Installing the Replacement UV Assembly

Note: When replacing all hardware, use LOCTITE 243 or equal on the threads. When adding/replacing a new style UV assembly (manufactured on or after May 2007) the existing trip arm should NOT be replaced.

Perform the following to install the replacement UV assembly:

a. Install the replacement UV assembly device ensuring that it is in full contact with the mounting surface of the insulator support channel (Figure 12, a). Attach the UV using the two 5/16”-18 x ¾” HEX head bolts, flat washers, and lock washers. Tighten the bolts to 13-14 ft-lbs.

Figure 12 Insulator Support Channel

a

a. Insulator Support Channel

b. Connect the wire lead on the UV assembly to the wire lead on the circuit breaker harness by matching the wire tag numbers.

c. Using 9/64” Allen wrench, install the jackshaft collar to the jackshaft with the hardware supplied (4 - 8/32 x 5/8 socket cap screw). Tighten all four screws equally, allowing the collar to slide along the jackshaft (Figure 13, a).

Figure 13 Jackshaft Collar

a

a. Jackshaft Collar


01.4SM.1801A

d. Slide the collar assembly along the jackshaft until the operating link (Figure 15, b) slot is aligned and engages with the rivet (Figure 15, c) on the rocker arm. Secure the collar to the jackshaft just enough that it will not spin when depressing the rocker arm.

e. Press the rocker arm (Figure 15, a) causing it to pivot and compress the spring on the solenoid plunger. While holding this position, rotate the collar up until the slot on the operating link of the collar engages with the rocker arm rivet. Securely tighten the four screws holding the jackshaft collar halves together. Once the collar is secure, the solenoid plunger should remain completely depressed (Figure 16). If it is not, redo step e until complete.

f. Reinstall the connecting rod, if removed, using new X-Washer to secure in place.

g. Refer to the Maintenance chapter of the circuit breaker instruction bulletin and reverse the instructions for removing the main closing spring and reinstall the main closing spring.

h. Test the UV assembly per Ch 4 Installation, e. teStinG the replAceMent undervoltAGe ASSeMBly.

e. teStinG the replAceMent undervoltAGe ASSeMBly

Perform the following to test the UV assembly:

Note: This test must be done electrically.

! CAUTIONPrior to connecting the test cabinet make sure the power switch and the UV power switch are in the OFF position. Failure to do so may result in personal injury.

1. Connect the test cabinet umbilical cord to the circuit breaker secondary disconnect receptacle.

2. Turn the UV power switch (Figure 14, e) on the test cabinet to the ON position.

3. Turn the test cabinet power switch (Figure 14, c) to the ON position. This will charge the circuit breaker.

4. After the circuit breaker is fully charged, push the close push button (Figure 14, a) on the test cabinet and ensure the circuit breaker is in the closed position by viewing CLOSED in the circuit breaker position indicator located on the front cover of the circuit breaker.

5. Push the UV trip push button (Figure 14, d) on the test cabinet. At this time the UV device will trip the circuit breaker.

Note: If the circuit breaker does not trip refer to the Adjustment of Primary and Secondary Trip Prop section of the circuit breaker instruction bulletin. Once these adjustments have been made repeat steps 1-5 of this section.

6. Reinstall the escutcheon plate and front cover of the circuit breaker.



Figure 14 Test Cabinet with Umbilical Cord

ON OFF

TRIPCLOSE

UV TRIPPOWER

UVOFFON

a

b

cd

e

f

g

a. Close Push Buttonb. Trip Push Buttonc. Test Cabinet Power Switchd. UV Trip Push Buttone. UV Power Switchf. Test Cabinet Umbilical Cordg. Test Cabinet Umbilical Plug

Figure 15 Compressing Solenoid Plunger & Tightening Jackshaft Collar

a

b

c

a. UV Rocker Armb. Operating Linkc. Rivet

Figure 16 Solenoid Plunger in Place with Jackshaft Collar Tightened


01.4SM.1801A

f. inStAllinG An Add-on undervoltAGe ASSeMBly

Perform the following to install the add-on undervoltage assembly:

1. Remove wire #1 found on pin #9 and wire #2 found on pin #10 (Figure 17) from the auxiliary switch located to the left of the mechanism.

2. Connect wires #1 and #2 to their corresponding number on the auxiliary switch to UV jumper (Figure 17, a).

3. Route the unconnected ends of the UV jumper to the UV wiring harness (Figure 17, b) and connect them to the corresponding wire tags #1 and #2.

4. Using a 9/64” Allen wrench, install the jackshaft collar to the jackshaft with the hardware supplied (4 - 8/32 x 5/8 socket cap screw). Tighten all four screws equally, allowing the collar to slide along the jackshaft (Figure 13, a).

5. Slide the collar assembly along the jackshaft until the operating link (Figure 15, b) slot is aligned and engages with the rivet (Figure 15, c) on the rocker arm. Secure the collar to the jackshaft just enough that it will not spin when depressing the rocker arm.

6. Press the rocker arm (Figure 15, a) causing it to pivot and compress the spring on the solenoid plunger. While holding this position, rotate the collar up until the rivet is fully engaged to the bottom of the operating link (Figure 15, b). Securely tighten the four screws holding the jackshaft collar halves together. Once the collar is secure, the solenoid plunger should remain completely depressed (Figure 16). If it is not, redo step 6 until complete.

7. Refer to the Maintenance chapter of the appropriate circuit breaker instruction bulletin and reverse the instructions for removing the main closing spring and reinstall the main closing spring.

8. Test the UV assembly per Ch 4 Installation, G. teStinG An Add-on undervoltAGe ASSeMBly.

G. teStinG An Add-on undervoltAGe ASSeMBly

Perform the following to test the Add-On UV assembly:

Note: This test must be done electrically.

! CAUTIONPrior to connecting the test cabinet make sure the power switch and the UV power switch are in the OFF position. Failure to do so may result in personal injury.

1. Connect the test cabinet umbilical cord to the circuit breaker secondary disconnect receptacle.

2. Turn the UV power switch (Figure 14, e) on the test cabinet to the ON position.

3. Turn the test cabinet power switch (Figure 14, c) to the ON position. This will charge the circuit breaker.

4. After the circuit breaker is fully charged, push the close push button (Figure 14, a) on the test cabinet and ensure the circuit breaker is in the closed position by viewing CLOSED in the circuit breaker position indicator located on the front cover of the circuit breaker.



5. Push the UV trip push button (Figure 14, d) on the test cabinet. At this time the UV device will trip the circuit breaker.

Note: If the circuit breaker does not trip refer to the Adjustment of Primary and Secondary Trip Prop section of the circuit breaker instruction bulletin. Once these adjustments have been made repeat steps 1-5 of this section.

6. Reinstall the escutcheon plate and front cover of the circuit breaker.

Figure 17 Auxiliary Switch to UV Jumper Illustration

10121417

15 13 11 9

8765 3

4 TCP11316 15 TCP2

1411E

1357

8 6 4 2

11

1

2

211 2

1

2

a

b

c

d

a. Auxiliary Switch to Undervoltage (UV) Jumper

b. UV Wiring Harnessc. Undervoltage Deviced. Auxiliary Switch

Powered by Safety®Powell Electrical Systems, Inc.Service Division - HoustonPO Box 12818 • Houston, TX • 77217

Tel: 713.944.6900 • Fax: [email protected]©2006 Powell Industries, Inc. • All rights reserved.

48VDC & 125VDC(For PowlVac® Circuit Breakers manufactured

after September 2014)

01.4SM.1801AUndervoltage Device for

PowlVac-ND® Circuit Breakers

October 2014

01.4sm.1801a undervoltage device for powlvac-nd circuit

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