S&C TripSaver® IICutout-Mounted Recloser

For enhanced lateral circuit protection at 15 kV and 25 kV

2

Conventional lateral circuit protection requires some concessionsOver 90% of temporary faults on overhead distribution circuits occur on laterals. Over the years, utilities have dealt with lateral protection a couple of ways.

Some utilities employ a “fuse blowing” philosophy: The substation feeder breaker is properly coordinated with the lateral fuse, so that the fuse will clear any downstream fault within its rating . . . not the breaker.

The problem: Service to customers on the lateral is permanently interrupted—even for a temporary fault—as shown in Figure 1. And the utility must deal with the high cost of service calls to replace lateral fuses.

Feeder breaker

Lateral fuse

Temporary fault

Figure 1. “Fuse blowing” philosophy.

Other utilities employ a “fuse saving” philosophy: The first trip of the substation feeder breaker is intentionally miscoordinated so that the breaker operates faster than the lateral fuse to clear a fault downstream of the lateral fuse. The second trip of the breaker is slower so that if the fault is still present, the lateral fuse will operate to clear it.

The problem: All customers on the feeder experience a momentary interruption for all faults—as shown in Figure 2.

Figure 2. “Fuse saving” philosophy.

TripSaver II provides better lateral protectionS&C’s new TripSaver II Cutout-Mounted Recloser eliminates these problems. It’s ideally suited for protection of laterals that experience frequent temporary faults. This self-powered, electronically controlled, single-phase vacuum fault interrupter is available for installation in new or existing current-production (“-R10” or “-R11”) S&C or MacLean Power Systems Type XS Fuse Cutout Mountings. A two-insulator, branch-feeder style mounting is also available.

TripSaver II eliminates the permanent outage which results when the lateral fuse operates in response to a temporary fault. Utilities using “fuse blowing” will see an improvement in SAIFI without sacrific- ing MAIFI.

And TripSaver II eliminates the momentary interruption on the feeder in instances where the breaker is tripped to save the lateral fuse during a temporary fault. Utilities using “fuse saving” will see an improvement in MAIFI without sacrificing SAIFI.

Introducing S&C’s new TripSaver II Cutout-Mounted Recloser:

A better solution for overhead lateral circuit protection at 15 kV and 25 kV

Feeder breaker

Lateral fuse

Temporary or permanent fault

3

Comparison of Lateral Protective Devices

Feature/Benefit Single-Phase Hydraulic Recloser

Dropout-Style Electronic Sectionalizer TripSaver II

Easy to install

Low initial price

Low installation cost

Fault-interrupting capability

Easy to reset

Electronic control

No bypass switch required

Light weight compared to oil reclosers

No battery backup required

Fits in cutout mounting

No momentary outage on the main feeder for lateral faults

TripSaver II has been tested to, and is in compliance with, IEEE Standards C37.60-2012 and C37.41-2008 and IEC Standard 62271-111. TripSaver II is manufactured in accordance with a quality system certified to ISO 9001:2000.

As shown in the following table, TripSaver II offers a number of advantages over traditional lateral protective devices.

4

TripSaver II’s operating sequenceTripSaver II supports up to three reclosing operations (four tripping operations in total) before it drops open. A wide variety of time-current characteristic (TCC) curves are available. The open interval between tripping operations is five seconds.

The vacuum interrupter resets two seconds after TripSaver II drops open. The operator can then reclose TripSaver II into the mounting.

In instances in which a temporary fault is cleared before TripSaver II reaches the end of its operating sequence, TripSaver II will revert to its first TCC curve, i.e., reset after 15 seconds have elapsed since the last reclosing operation.

How TripSaver II works for a temporary faultConsider a temporary fault downstream of TripSaver II, as shown in Figure 3.

TripSaver II

Feeder breaker

Figure 3. Temporary fault.

Utilizing its fast TCC curve, TripSaver II opens, as shown in Figure 4. Only customers served from the lateral downstream of TripSaver II experience a momentary interruption.

Figure 4. TripSaver II opens.

After five seconds, TripSaver II recloses, restoring power to customers served from the lateral downstream, as shown in Figure 5. Since the fault was temporary and has been cleared, further tripping operations aren’t needed. TripSaver II reverts to its first TCC after 15 seconds.

Figure 5. TripSaver II recloses.

How TripSaver II works for a permanent faultConsider a permanent fault downstream of TripSaver II, as shown in Figure 6.

Temporary fault

5

As before, utilizing its fast TCC curve, TripSaver II opens, as shown in Figure 7. Again, only customers served from the lateral downstream of TripSaver II experience a momentary interruption.

Since the fault is permanent, TripSaver II performs further tripping operations per the specified TCC curves. For utilities employing “fuse saving” philosophy, TripSaver II drops open at the end of its operating sequence, in the same manner as a standard fuse cutout—providing visual indication that the faulted lateral has been isolated, as shown in Figure 9. The vacuum interrupter resets two seconds after TripSaver II drops open. TripSaver II may then be reclosed by the operator once the fault has been repaired.

Figure 6. Permanent fault. Figure 8. TripSaver II recloses.

Figure 7. TripSaver II opens. Figure 9. TripSaver II drops open.

TripSaver II recloses, as shown in Figure 8.

Permanent fault

TripSaver II

Feeder breaker

Permanent fault Permanent fault

6

Ice-Breaking CapabilityTripSaver II is capable of dropping open under ¾-inch (20-mm) ice formation.

Sectionalizing OptionA sectionalizing option is available for TripSaver II models rated 4 kA. If specified, TripSaver II will operate as a sectionalizer for faults between 4 kA and 6.5 kA. TripSaver II will count the number of operations of the source-side circuit-breaker or recloser, and drop open after the specified number of counts. The counter resets if no sectionalizing event is registered for 120 seconds.

Construction and Features

A Birdproof-design insulator—higher insulation characteristics than ANSI distribution-cutout standards. Porcelain insulator shown; composite-polymer silicone insulator also available. NEMA Type B and S&C Extended Mounting Brackets are available

B Parallel-groove connector—tin-plated cast red brass. For ease of connection, accommodates two conductors, even of unlike size

C Attachment hooks for Loadbuster® Tool—it also guides TripSaver II during manual closing

D Upper contact—silver-to-silver; stainless-steel spring provides high contact pressure

E Bumper and Retainer—spring-loaded retainer and bumper dampen impact on closing, reducing the possibility of bounce-back

F Vacuum fault interrupter—it is contained inside the upper housing

G Trunnion—high-strength cast bronze, silver plated. Surfaces around trunnion bear on broad hinge surfaces to keep TripSaver II in alignment during closing. Its special shape facilitates easy removal and reduces vibration

H Lower contacts—silver-to-silver; provide dual current path, independent of hinge pivot

I Mode selector—for selecting automatic reclosing or non-reclosing operation. In non-reclosing mode, TripSaver II will operate “one-shot-to-lockout,” suitable for use when crews are working downstream of TripSaver II

J Liquid-crystal display screen—displays TripSaver II status. Six languages are supported

D

I

B

J

F

E

C

A

G

H

7

1 For 50-Hz applications, specify Microprocessor Control for Application on 50-Hz Systems, Catalog Number Suffix “-F.”

2 Minimum trip current is 5 amperes.

a Applicable for protection of single-phase-to-neutral circuits only in solidly-grounded-neutral (multi-grounded-neutral) 34.5-kV systems where leakage distance to ground meets user’s requirement. Uses 25-kV 150-kV BIL mounting.

RatingsComplete Overhead—Pole-Top Style TripSaver II—For a new installation.Includes TripSaver II, mounting (less mounting bracket), and connectors

50/60-Hz Ratings1 With Porcelain Insulator With Polymer Insulator

kV Amperes, RMS2 Leakage Distance to

Ground Minimum, Inches (mm)

BaseCatalog Number

Leakage Distance to Ground Minimum,

Inches (mm)

BaseCatalog NumberSystem

Class Nom. Max BIL Cont. Interr.,Sym.

15 15 15.5 110 1004 000 8Z\x (216) 990111 14M\, (378) 990111-P

6 300 8Z\x (216) 990211 14M\, (378) 990211-P

25 25 29

125 1004 000 11 (279) 990122 — —

6 300 11 (279) 990222 — —

150 1004 000 17 (432) 990132a 19 (483) 990132-Pa

6 300 17 (432) 990232a 19 (483) 990232-Pa

Complete Branch-Feeder Style TripSaver II—For a new installation. Includes TripSaver II, mounting (less backup member and mounting hardware), and connectors

50/60-Hz Ratings1 With Porcelain Insulator With Cypoxy® Insulator

kV Amperes, RMS2 Leakage Distance to Ground Minimum,

Inches (mm)

BaseCatalog Number

Leakage Distance to Ground Minimum,

Inches (mm)

BaseCatalog Number

SystemClass Nom. Max BIL Cont. Interr.,

Sym.

15 15 15.5 150 1004 000 24 (610) 993131 24 Z\v (616) 993131-E

6 300 24 (610) 993231 24 Z\v (616) 993231-E

25 25 29 150 1004 000 24 (610) 993132a 24 Z\v (616) 993132-Ea

6 300 24 (610) 993232a 24 Z\v (616) 993232-Ea

1 For 50-Hz applications, specify Microprocessor Control for Application on 50-Hz Systems, Catalog Number Suffix “-F.”

2 Minimum trip current is 5 amperes.

a Applicable for protection of single-phase-to-neutral circuits only in solidly-grounded-neutral (multi-grounded-neutral) 34.5-kV systems where leakage distance to ground meets user’s requirement. Uses 25-kV 150-kV BIL mounting.

TripSaver II Only—For retrofitting in an existing current-production (“-R10” or “-R11”) S&C or MacLean Power Systems Type XS Fuse Cutout Mounting

For Use with Type XS Fuse Cutout Mounting 50/60-Hz Ratings1

Basic Catalog Number

kV Amperes, RMS2

SystemClass Nom. Max BIL Cont. Interr.,

Sym.

BaseCatalogNumber

89811, 89021, 89031, 89071, SC15HG, 89221, 99021 15 15 15.5 110 100

4 000 997111

6 300 997211

89812, 89022, 89032, 89072, 89802, 89042, 89052, 89092, SC27SG, 89222, 89223, 99022, 99042 25 25 29 125 or

150100

4 000 997132

6 300 997232

1 For 50-Hz applications, specify Microprocessor Control for Application on 50-Hz Systems, Catalog Number Suffix “-F.”

2 Minimum trip current is 5 amperes.

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1 Discrete pickup currents (5 A through 200 A), and discrete time multi-pliers (0.1 through 0.9 and 1 through 9) can be selected.

Mounting Bracket Options—For Overhead—Pole-Top Style TripSaver II Models

Item Add Catalog Number Suffix

S&C Extended Mounting Bracket, for crossarm, pole, or wall mounting -B

NEMA Type B Mounting Bracket, for crossarm mounting - C

Backup Member and Mounting Hardware Options—For Branch-Feeder Style TripSaver II Models

Item Add Catalog Number Suffix

Backup Member with galvanized steel carriage bolts (3 minimum thread), flat washers, lockwashers, and nuts

Two 3/8 –16 7-1/2 bolts -D1

Four 3/8 –16 7-1/2 bolts -D2

Two 3/8 –16 9 bolts -D3

Four 3/8 –16 9 bolts -D4

Sectionalizer Mode Option—For TripSaver II Models Rated 4 kA Only Item Add Catalog Number Suffix

Sectionalizer Mode—TripSaver II will operate as a recloser and interrupt fault currents up to 4 kA. For fault currents greater than 4 kA, up to 6.5 kA, TripSaver II will operate as a sectionalizer, and drop open after counting the specified number of source-side circuit breaker or recloser tripping operations. The counter resets if no sectionalizing event is registered for 120 seconds

-Snl

l Specify the number of source-side circuit breaker or recloser tripping operations, “n” (1 to 9), that TripSaver II counts up to before dropping open.

Time-Current Characteristic Curves

Instan- taneous

Fuse Link Recloser1

K Speed

T Speed

Cooper Forms 4, 5, 6, FX Cooper Hydraulic Recloser

SEL 351R/651R101- 112

113- 132

133- 151 Type H Type 4H,

V4H Type LType V4L

(V4E)Type E Type

4E

S&C Instan-

taneous

6K 6T S&C 101

S&C 113

S&C 133 S&C A S&C A S&C A S&C A S&C A S&C A Inverse (U2)

10K 10T S&C 102

S&C 115

S&C 134 S&C B S&C B S&C B S&C B S&C B S&C B Very Inverse (U3)

20K 20T S&C 103

S&C 116

S&C 135 S&C C S&C C S&C C S&C C S&C C S&C C Extremely Inverse

(U4)

30K 30T S&C 104

S&C 117

S&C 137 S&C D S&C D S&C D S&C D Short-Time Inverse

(U5)

40K 40T S&C 105

S&C 118

S&C 138 Inverse (C1)

50K 50T S&C 106

S&C 119

S&C 140 Very Inverse (C2)

65K 65T S&C 107

S&C 120

S&C 141

Extremely Inverse (C3)

80K 80T S&C 111

S&C 131

S&C 142

Short-Time Inverse (C5)

100K 100T S&C 112

S&C 132

S&C 151

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The “Display” screen scrolls through six additional parameters.

Load Current Last Fault Current Operation Counter

Vacuum Interrupter Life Remaining Internal Ambient Temperature Sectionalizing Feature Enabled, with Counts Setting

LCD screen and mode selector. Springs help guide mode selector lever to the desired position; colored labels provide visual confirmation. “NR” mode engaged as shown: upper label completely exposes and lower labels align.

The “Normal” screen shows four operating parameters.

Indicator appears if TripSaver II trips and drops open on overload

Vacuum interrupter status

Service Soon indicator appears when 10% vacuum interrupter life remains

Operating mode

User Interface

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TripSaver II Styles

Base Catalog Numbers 990111 or 990211. Complete Overhead—Pole-Top Style TripSaver II rated 15 kV nominal; 15.5 kV maximum; 110 kV BIL; 100 amperes continuous; 4 000 or 6 300 amperes interrupting, RMS, symmetrical; 8Z\x inches (216 mm) leakage distance to ground; porcelain mounting.

Base Catalog Numbers 990122 or 990222. Complete Overhead—Pole-Top Style TripSaver II rated 25 kV nominal; 29 kV maximum; 125 kV BIL; 100 amperes continuous; 4 000 or 6 300 amperes interrupting, RMS, symmetrical; 11 inches (279 mm) leakage distance to ground; porcelain mounting.

Base Catalog Numbers 990132 or 990232. Complete Overhead—Pole-Top Style TripSaver II rated 25 kV nominal; 29 kV maximum; 150 kV BIL; 100 amperes continuous; 4 000 or 6 300 amperes interrupting, RMS, symmetrical; 17 inches (432 mm) leakage distance to ground; porcelain mounting.

Base Catalog Numbers 993131-E or 993231-E. Complete Branch-Feeder Style TripSaver II rated 15 kV nominal; 15.5 kV maximum; 150 kV BIL; 100 amperes continuous; 4 000 or 6 300 amperes interrupting, RMS, symmetrical; 24Z\v inches (616 mm) leakage distance to ground; Cypoxy insulators.

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Handling TripSaver II—Overhead—Pole-Top Style Shown

TripSaver II in dropped-open position Closing TripSaver II back into mounting

Opening TripSaver II with Loadbuster ®

Two seconds after TripSaver II drops open, the vacuum interrupter resets.

TripSaver II can be readily closed back into the mounting using a standard hookstick equipped with an S&C Talon™ Fuse Handling Fitting or a distribution prong.

If the lateral circuit needs to be de-energized, TripSaver II can be opened using Loadbuster—the S&C Loadbreak Tool.

Offices Worldwide f www.sandc.com

Descriptive Bulletin 461-32 November 19, 2012©

Pri

nte

d in

U.S

.A.

Voltage Ratings15 kVNominal Operating Voltage (kV) . . . . . . . . . . . . . . . . . . . . 15Maximum Design Voltage (kV) . . . . . . . . . . . . . . . . . . . 15.5Basic Insulation Level (BIL) of mounting . . . . . . . . . . . . . 110

25 kV

Nominal Operating Voltage (kV) . . . . . . . . . . . . . . . . . . . . 25Maximum Design Voltage (kV) . . . . . . . . . . . . . . . . . . . . . 29Basic Insulation Level (BIL) of mounting . . . . . . . . . 125/150

Current RatingsContinuous Current (amperes)

All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100Symmetrical Interrupting Current (amperes)

All models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 000/6 300Overload Capability (minutes @ 50°C)

All models 125 amperes (125%) . . . . . . . . . . . . . . . . . . . . . . . . . . 45 150 amperes (150%) . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Half-Second Current, Symmetrical (amperes) All models —100 amperes . . . . . . . . . . . . . . . . . . . . . 6 300

Duty CyclePercent of Maximum Circuit Interrupting

Rating

Minimum X/R Ratio

Number of Unit Operations

15-2045-55

90-100

248

322412

Total 68

Mechanical LifeMinimum Number of Operations . . . . . . . . . . . . . . . . . . 2000

Weight, lbs. (kg)15-kV (110-kV BIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 (10.5)25-kV (125-kV BIL or 150-kV BIL) . . . . . . . . . . . . . . . . 25 (11.3)

Specifications