SandC Mark Circuit Switcher Switching and Protection Instruction Manual

The seller’s standard conditions of sale set forth in Price
Sheet 150 apply, except as modified under the Special Warranty
Provisions on page 3 and Warranty Qualifications sections on page
4.

Special To This Product

INCLUSIONS:

POWER OPERATION: For high-speed tripping of power-operated Mark
V Circuit-Switchers, add an optional S&C Shunt-Trip Device. See
Table 7 on page 11. The Type CS-1A Switch Operator is required if
the shunt-trip device is specified.

MANUAL OPERATION: The circuit-switcher is capable of two
fault-closing operations consisting of closing against and carrying
for three seconds its rated fault-closing current, after which it
can carry and interrupt its rated continuous current and is capable
of power operation–either opening or closing.

Mounting of Circuit-Switchers

Refer to Table 1 for Static and Dynamic Deflection Limit
Resources based on the Circuit-Switcher Style and Rating.

Exclusions

Mark V Circuit-Switchers do not include:

Connectors. Various connectors are available, as listed in
Table 8 on page 14. Specify the quantity and catalog number of the
connectors desired.

manual operating handles.

FAQ

Q: What is the voltage range for the Mark V
Circuit-Switchers?

A: The voltage range for the Mark V Circuit-Switchers is from
34.5 kV through 345 kV.

Q: Are connectors included with the Circuit-Switchers?

A: No, Mark V Circuit-Switchers do not include connectors.
Various connectors are available separately.

Q: What is required for high-speed tripping of power-operated
Circuit-Switchers?

A: An optional S&C Shunt-Trip Device needs to be added along
with the Type CS-1A Switch Operator if the shunt-trip device is
specified.

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Mark V Circuit-Switchers Outdoor Transmission (34.5 kV through 345 kV)

Specifications

Table of Contents
Conditions of Sale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Special To This Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
How to Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Application Classification . . . . . . . . . . . . . . . . . . . . . . . .6 Ordering Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . 18

Specification Bulletin 711-31

Conditions of Sale

Standard
The seller’s standard conditions of sale set forth in Price Sheet 150 apply, except as modified under the “Special Warranty Provisions” on page 3 and “Warranty Qualifications” sections on page 4.
Special To This Product
INCLUSIONS
The Mark V Circuit-Switcher uses an in-series circuitbreaking interrupter and a circuit-making and isolating disconnect, making it especially suited for switching and protection of transformers, lines, cables, capacitor banks, and line-connected or tertiary-connected shunt reactors. The Mark V Circuit-Switcher is suitable for frequent operation over a long period of time with minimal maintenance. It is capable of closing, carrying, and interrupting fault currents as well as load currents, and it uses interrupters economically tailored for specific applications by using the precise number of interrupting gaps required. These interrupters are unaffected if subjected to sustained system voltage for extended periods resulting from being left open with the disconnect blades closed for any reason. The Mark V Circuit-Switcher is available in three styles–vertical-break, center-break, and integer.
POWER OPERATION
High-speed, high-torque power operation of S&C Mark V Circuit-Switchers is required to provide two-time duty-cycle fault-closing ratings of 30,000 amperes, RMS, three-phase symmetrical, 76,500 amperes peak for the vertical-break style and integer-style circuitswitchers; and two-time duty-cycle fault-closing ratings of 40,000 amperes, RMS, three-phase symmetrical, 102,000 amperes peak for the center-break style circuitswitchers. See the “Basis of Fault-Closing Ratings” section. Power operation of Mark V Circuit-Switchers also provides opening and closing without hesitation under ¾-inch (19-mm) ice formation for the vertical-break and integer styles, 1½-inch (38-mm) ice formation for the center-break style, close interphase simultaneity, long life of fault-closing contacts under normal operating duties, and avoidance of excessive switching transients caused by prolonged or unstable prestrike arcing. Mark V Circuit-Switchers are provided with high-speed, high-torque power operation by adding Type CS-1A Switch Operators. Refer to S&C Specification Bulletin 719-31 for details on Type CS-1A Switch Operators.

For high-speed tripping of power-operated Mark V Circuit-Switchers, add an optional S&C Shunt-Trip Device. See Table 7 on page 11. This shunt-trip device provides high-speed (8-cycle) circuit interruption. The Type CS-1A Switch Operator is required if the shunt-trip device is specified.
BASIS OF FAULT-CLOSING RATINGS
Two-time duty-cycle fault-closing ratings, as set forth above and on succeeding pages, apply to Mark V CircuitSwitchers when powered by the Type CS-1A Switch Operator and are based on performance as follows:
1. The circuit-switcher is capable of two fault-closing operations consisting of closing against and carrying for three seconds its rated fault-closing current, after which it can carry and interrupt its rated continuous current and is capable of power operation–either opening or closing.
2. After each occasion consisting of either one or two fault-closing operations at its rated fault-closing current, the circuit-switcher must be inspected and any necessary repair or replacement of the faultclosing contacts made to restore the device to its original condition.
MANUAL OPERATION
Integer-style, vertical-break style, and center-break style Mark V Circuit-Switchers (with extruded-aluminum weldment bases)–are all available for manual operation. Manually operated circuit-switchers, however, do not provide the performance features obtainable with power-operated circuit-switchers described in the “Power Operation” section on page 2 such as fault-closing ratings and opening and closing under ice formation, nor can they be furnished with the shunt-trip device. Also, for manually operated Mark V Circuit-Switchers, the degree of simultaneity of opening and closing of the three poleunits depends on the proper installation and adjustment of the operating mechanism–as well as on the speed of cranking at the operating handle–and must be considered in establishing ground-relay settings. If manual operation is desired, specify the S&C Manual Geared Operating Handle listed in Table 9 on page 15.

2 S&C Specification Bulletin 711-31 .

10 cycles for center-break style circuit-switchers .

Conditions of Sale

MOUNTING OF CIRCUIT-SWITCHERS
The high operating speed makes possible many of the Mark-V Circuit-Switcher’s superior performance features when power-operated (described on page 1) and brings about the high dynamic forces for which S&C Mounting Pedestals were specifically designed–and are thus highly recommended. (See Table 13 on page 17.) Alternately, circuit-switchers can be installed on the user’s steel pedestals or supporting structures, which must meet specific static and dynamic deflection limits shown on the data sheets listed in Table 1.

Table 1 . Static and Dynamic Deflection Limit Resources

Circuit-Switcher Style and Rating
Vertical-break, 34 .5 through 161 kV
Center-break, 230 kV: extruded-aluminum weldment base
Center-break, 345 kV: aluminum-sheathed steel weldment base
Integer, 34 .5 through 69 kV

Static and Dynamic Loading
Specifications Data Sheet 711-300
Data Sheet 711-301
Data Sheet 711-302
Data Sheet 711-303

EXCLUSIONS
Mark V Circuit-Switchers do not include connectors. Various connectors are available, as listed in Table 8 on page 14. Specify the quantity and catalog number of the connectors desired.
Circuit-switchers do not include manual operating handles.
Mounting pedestals and anchor bolts, if furnished, are not included and must be ordered separately. For mounting pedestals and anchor bolts, see Table 13 on page 17.
Circuit-switchers do not include the services of an S&C field service specialist for evaluating the condition of the circuit-switcher.

SPECIFICATION DEVIATIONS
When Mark V Circuit-Switchers are to be provided with special connectors (including all expansion, compression, and multi-conductor types), refer to the nearest S&C Sales Office.
Single-, two-, and four-pole vertical-break style and center-break style circuit-switchers are available. Refer to the nearest S&C Sales Office.

USUAL OPERATING CONDITIONS
Mark V Circuit-Switchers will perform as intended at temperatures within the range of -40°C to + 40°C (-40°F to + 104°F), at altitudes of up to 3300 feet (1000 meters),, and at wind loadings of up to 100 miles per hour (160 kilometers per hour).
Mark V Circuit-Switchers, when installed with the recommended S&C Mounting Pedestals and anchor bolts (see Table 13 on page 17), are capable of withstanding seismic loading of 0.2-g ground acceleration in any direction, as well as performing as intended during such loading and afterward.
For applications at temperatures not within the specified range, at higher altitudes, at higher wind loadings, or where higher seismic withstand capabilities are required, refer to the nearest S&C Sales Office.
SPECIAL WARRANTY PROVISIONS
The standard warranty contained in the seller’s standard conditions of sale, as set forth in Price Sheet 150, applies to Mark V Circuit-Switchers and accessories and associated switch operators, except the first paragraph of the said warranty is replaced by the following:
(1) General: The seller warrants to the purchaser for a period of five years from the date of shipment that the equipment delivered will be of the kind and quality specified in the contract description and will be free of defects of workmanship and material. Should any failure to conform to this warranty appear under proper and normal use within five years after the date of shipment, the seller agrees, upon prompt notification thereof and confirmation that the equipment has been stored, installed, operated, inspected, and maintained in accordance with recommendations of the seller and standard industry practice, to correct the nonconformity either by repairing any damaged or defective parts of the equipment or (at the seller’s option) by shipment of necessary replacement parts.
Replacement parts provided by the seller under the warranty for the original equipment will be covered by the original-equipment warranty for its duration. Replacement parts purchased separately will be covered by the warranty contained in the seller’s standard conditions of sale, as set forth in Price Sheet 150.

Mark V Circuit-Switchers can be installed at altitudes greater than 3300 feet (1000 meters), but deratings to the BIL voltage will apply . Refer to the nearest S&C Sales Office for details .
. S&C Specification Bulletin 711-31 3

Conditions of Sale
WARRANTY QUALIFICATIONS Warranty of circuit-switchers is contingent upon each of the following: Observance of the static and dynamic deflection
limits shown on S&C Data Sheet 711-300, 711-301, 711-302, or 711-303, as applicable Power operation of circuit-switchers only by S&C Switch Operators Installation and adjustment of circuit-switchers in accordance with S&C’s applicable erection drawings and instruction sheets Conformance with the inspection recommendations defined in S&C Instruction Sheet 711-590
4 S&C Specification Bulletin 711-31 .

How to Order

Complete these steps to identify the base catalog number, the appropriate options, and the product accessories to complete this order:

STeP 1 .

Obtain the catalog number of the desired circuit-switcher from Table 3 and Table 4 on page 9, and Table 5 and Table 6 on page 10.

Catalog Number: 1 5 7 3 1 4

STeP 2 .

Obtain the suffix letters of optional features, if desired, from Table 7 on page 11 through page 12. Add the indicated suffix letter(s) to the catalog number of the circuit-switcher selected in Step 1.

Catalog Number: 1 5 7 3 1 4 Suffix: — T 1

STeP 3 .

Obtain the catalog number of the mounting pedestal(s), if desired, from Table 13 on page 17. From this same table, obtain the catalog number of the required anchor bolts, taking care to note the quantity of anchor bolts required for the circuit-switcher selected.

Catalog Number: 9 2 4 5 0 R 1 — G Catalog Number: S — 8 1 3 6 5 — 2

STeP 4 .

Select a manual handle or switch operator.
If manual operation is desired: Order an S&C Manual Geared Operating Handle. Obtain the catalog number for the manual handle from Table 9 on page 15.
If accessories for the manual geared operating handle are desired: Obtain the

suffix letters of the desired accessories from Table 10. Add the indicated suffix letter(s) to the catalog number of the operating handle.
Catalog Number: 5 2 9 1 — F 1 Suffix: — F 1
If power operation is desired, order a Type CS-1A Switch Operator. Refer to Specification Bulletin 719-31 for catalog and ordering information.

STeP 5 .

If connectors are desired, obtain the catalog number of the desired connector from Table 8 on page 14. Order six connectors for each circuit-switcher.

4 Catalog Number: 5 6 8

Example: The final catalog number for a complete order that includes a 138-kV, 1200-A continuous circuitswitcher, two interrupting gaps, with pre-assembly and a 125-Vdc shunt-trip device would be:

1 5 7 3 2 9 –A T 2

Note: All Mark V Circuit-Switcher orders must be designed by S&C’s Custom Engineering team. Spare or replacement interrupters for Mark V Circuit-Switchers are ordered using the same method outlined above.

. S&C Specification Bulletin 711-31 5

Application Classification

Table 2 . Application Classifications

Class

Application Qualifications

Maximum Amperes, Interrupting, RMS,
Symmetrical

Symbol

Solidly or effectively
Grounded System

Ungrounded System

Max 60-Hertz recovery voltage: 90 kV, RMS

1200/1600/2000

Parallel switching

Max 60-Hertz recovery voltage: 150 kV, RMS

1200/1600/2000

Transformers connected solidly grounded-wye

Load dropping on the primary (circuit-switcher) side and delta

and magnetizing on the secondary side

current switching

All other connections of transformers

—

Primary faults–with the total connected length of

Transformer Switching

all lines on the source side of the circuit-switcher

7000 or 8000

not less than that indicated in footnote

and Protection

Primary faults–with the total connected length of

all lines on the source side of the circuit-switcher

4000

Fault

less than that indicated in footnote

interrupting Secondary faults–transformers connected

solidly grounded-wye on the primary (circuit-

4000

switcher) side and delta on the secondary side

Secondary faults–all other connections of transformers

4000

Internal faults–see both primary and secondary faults, above

Load splitting Max 60-Hertz recovery voltage: 90 kV, RMS

1200/1600/2000

(parallel or

loop switching) Max 60-Hertz recovery voltage: 150 kV, RMS

1200/1600/2000

Circuits with all load-side transformers

connected solidly grounded-wye on the primary (circuit-switcher) side and delta on the secondary

1200/1600/2000

—

Load dropping side

Line Switching

Circuits with load-side transformers connected other than as described above

1200/1600/2000

and Protection Line dropping

Line or bus faults–with the total connected

length of all lines on the source side of the circuit-switcher not less than that indicated in

7000 or 8000

Fault

footnote

interrupting Line or bus faults–with the total connected

length of all lines on the source side of the circuit-switcher less than that indicated in

4000

footnote

TABLE CONTINUED

6 S&C Specification Bulletin 711-31 .

Application Classification

Table 2 . Application Classifications–Continued

Class

Application Qualifications

Maximum Amperes, Interrupting, RMS,
Symmetrical

Symbol

Solidly or effectively
Grounded System

Ungrounded System

Load splitting (parallel or loop switching)

Max 60-Hertz recovery voltage: 90 kV, RMS Max 60-Hertz recovery voltage: 150 kV, RMS

1200/1600/2000

Circuits with all load-side transformers connected solidly

grounded-wye on the primary (circuit-switcher) side and

1200/1600/2000

—

Load dropping delta on the secondary side

Circuits with load-side transformers connected other than as described above

1200/1600/2000

Cable Switching and Protection

Cable dropping (charging current)

Shielded cable Unshielded cable

550

Cable or bus faults–with any total connected length of

cable, and with a total connected length of all overhead lines on the source side of the circuit-switcher not less than

7000 or 8000

Fault

that indicated in footnote

interrupting Cable or bus faults–with any total connected length of

cable, but with a total connected length of all overhead lines on the source side of the circuit-switcher less than that

4000

indicated in footnote

Bank current switching

Grounded capacitor bank

Applications on solidly grounded systems through 69 kV
All other applications

1000 550

—

Shunt Capac-

Ungrounded capacitor bank

550

itor Bank

Switching and

Primary faults–with the total connected length of all lines

Protection

Fault inter-

on the source side of the circuit-switcher not less than that indicated in footnote

7000 or 8000

rupting

Primary faults–with the total connected length of all lines

on the source side of the circuit-switcher less than that

4000

indicated in footnote

Series Reactor Switching

Refer to the nearest S&C Sales Office

Shunt Reactor Switching and Protection (line-connected or tertiary-connected reactors)

Reactor current switching
Fault interrupting

Reactor wye-connected with solidly grounded neutral Reactor delta-connected, or wye-connected with ungrounded neutral Oil-insulated reactors
Air-insulated reactors

1000

2800 2000

X0/X1 from 0 to + 3 .0 and R0 /X1 from 0 to + 1 .0 . Includes both single and multiple (back-to-back) banks .
S&C BankGuard Plus® Controls, described and listed in S&C Specification Bulletin 1011-31 have the sensitivity to detect the first faulted unit in a capacitor bank or to promptly respond to a shorted-turns fault in a shunt reactor–but with the discrimination to disregard system and bank unbalances as well as spurious transients . For installations of S&C Automatic Control Devices on, or in the same substation with, 345-kV or 500-kV circuits, contact the nearest S&C Sales Office .

The interrupting ratings shown are applicable for the following reclosing duty cycle: O + 0 seconds (no intentional delay) + CO + 0 seconds + CO .
For integer-style circuit-switchers (except catalog numbers 157886 and 157986) the maximum 60-Hertz recovery voltage is 75 kV, RMS .
Three-phase transformers or three-phase banks of single-phase transformers .

FOOTNOTES CONTINUED

. S&C Specification Bulletin 711-31 7

Application Classification

TABLE 2 FOOTNOTES CONTINUED

Total connected length of all overhead lines (in all directions), including any number of feeders connected to source-side substations, as indicated in table below . Connected cable may reduce or eliminate the line-length requirement . Contact the nearest S&C Sales Office .

System Voltage, kV Total Length, Miles (km)

34 .5 115 and 161 230 345 thru 69 138

15 20 25 40

(11) (24) (32) (40) (64)

And all single-phase transformers connected phase-to-ground on the primary (circuit-switcher) side .
For applications involving wye-connected reactor banks with neutral grounded through a fourth reactor, contact the nearest S&C Sales Office .
Depending upon continuous rating of the circuit-switcher .
Circuit-switcher will drop loads through 1200, 1600, or 2000 amperes, depending upon its continuous rating, and will switch magnetizing currents associated with such loads .
Tripping of a circuit-switcher must be coordinated with a series power fuse or with source-side protective equipment for short-circuit currents in excess of this value .
8000 amperes for all Mark V Circuit-Switcher models rated 34 .5 kV through 69 kV, also 2-gap models rated 115 kV and 3-gap models rated 138 kV and 161 kV; 7000 amperes for all other Mark V Circuit-Switchers for which symbol “J” applies .
3000 amperes for 115-kV single-gap Mark V Circuit-Switchers .
The Mark V Circuit-Switcher is suitable for transformer-primary applications where the inherent secondary-fault current–the secondary-side fault current as reflected on the primary side of the transformer, assuming an infinite (zero-impedance) source–does not exceed 4000 amperes (3000 amperes in the case of 115-kV single-gap Mark V Circuit-Switchers) for a fault external to the transformer . The inherent secondary-fault current may be calculated as follows:

57 .8P I =
(%Z)E

where I = Inherent secondary-fault current, amperes P =Transformer self-cooled three-phase rating, kVA E = Primary-side system phase-to-phase voltage, kV
%Z = Percent transformer primary-to-secondary impedance, referred to transformer self-cooled three-phase kVA rating

For applications where the inherent secondary-fault current exceeds the above limits but where the maximum expected fault current, based on transformer impedance plus source impedance (anticipating future system growth), is within these limits, contact the nearest S&C Sales Office .
Symbol “E” for solidly grounded systems; symbol “F” for effectively grounded systems .
Maximum length of line: 300 miles .
For vertical-break and integer style circuit-switcher applications where load in excess of 550 amperes is to be switched frequently, extra-performance closing contacts are recommended for increased contact life; refer to the Table 7 on page 11 through page 12 .
Symbol “K” for solidly grounded capacitor banks applied on solidly grounded systems; symbol “L” for all other applications .
For center-break style circuit-switcher reactor switching applications above 500 amperes, contact the nearest S&C Sales Office .
For applications up to 4000 amperes, contact the nearest S&C Sales Office .
Symbol “P” for solidly grounded reactors applied on solidly grounded systems, provided phase-to-phase and ungrounded three-phase faults are cleared by other devices; symbol “R” for all other applications .

8 S&C Specification Bulletin 711-31 .

Ordering Tables

Table 3 . Circuit-Switchers–Three-Pole Vertical-Break Style

Ratings

kV Nom . Max . BIL

Cont .

Amperes, RMS

Short-Time Mom . 3-Sec .

FaultClosing, Duty-Cycle, Two-Time

No . of Interrupting
Gaps

Application Classifications (see Table 2 on
page 6)

Insulator T .R .
No .

Leakage Distance,
Inches (mm)

Catalog Number

Page Reference
for Dimensional Informa-
tion

34 .5 38 200 1200 61 000 40 000 30 000

BEFGHJKLMPR

210

37 (940)

157314

46 48 .3 250 1200 61 000 40 000 30 000

BEFGHJKLMPR

214

43 (1092)

157315

69 72 .5 350 1200 61 000 40 000 30 000

BEFGHJKMP

216

157316

BEFGHJKLMPR

216

(1829)

157326

115 121 550 1200 61 000 40 000 30 000

BEFGJM

286

157318

BEFGHJKLMNPR 286

(2515)

157328

138 145 650 1200 61 000 40 000 30 000

BEFGHJKMNP

288

116

157329

BEFGHJKLMNPR 288

(2946)

157369

161 169 750 1200 61 000 40 000 30 000

BEFGHJKMNP

291

132

157320

BEFGHJKMNPR

291

(3353)

157360

For complete information refer to the “Basis of Fault-Closing Ratings” section on page 2 .
If the circuit-switcher is to be installed on a structure other than S&C Mounting Pedestals (see Table 13 on page 17), detailed drawings of the user-furnished mounting structure must be supplied at the time of order . Please contact your nearest S&C Sales Office for details .

Table 4 . Circuit-Switchers–Three-Pole Center-Break Style, with extruded-Aluminum Weldment Bases

Ratings

Amperes, RMS

Nom . Max . BIL Cont .

Short-Time Mom . 3-Sec .

FaultClosing, Duty-Cycle, Two-Time

No . of Interrupting
Gaps

Application Classifications (see Table 2 on
page 6)

Insulator T .R . No .

Leakage Distance,
Inches (mm)

Catalog Number

Page Reference for Dimen-
sional Information

1600 70 000 42 750

40 000

230 242 900

2000 80 000 50 000

40 000

Circuit-switchers do not include connectors . Refer to Table 8 on page 14 . Circuit-switchers are furnished with gray (Munsell Number 5 BG 7 .0/014) station post insulators .
Circuit-switchers do not include manual operating handles . (See Table 9 on page 15 .)
Shunt-trip device is available with all power-operated center-break style Mark V Circuit-Switchers .
For center-break style circuit-switchers, blade opening direction, as viewed from interrupter end, is to the left .
Flexible-conductor connections are recommended at both ends of all center-break style circuit-switchers with extruded-aluminum

BEFGHJKMNP 308

165 (4191)

657361R2

BEFGHJKMNP 308

165 (4191)

757361R2

weldment bases, except when the bypass accessory (catalog number suffix “-B2”) is furnished . In this instance, a rigid bus connection is necessary at the rotating-insulator end . To reduce circuit-switcher deflection during opening and closing operations–which can loosen the bus connection–double-acting shock absorbers (catalog number suffix “-H”) are available and are recommended .
For complete information refer to the “Basis of Fault-Closing Ratings” section on page 2 .
If the circuit-switcher is to be installed on a structure other than S&C Mounting Pedestals (see Table 13 on page 17), detailed drawings of the user-furnished mounting structure must be supplied at the time of order . Please contact your nearest S&C Sales Office for details .

. S&C Specification Bulletin 711-31 9

Ordering Tables

Table 5 . Circuit-Switchers–Three-Pole Center-Break Style,with Aluminum-Sheathed Steel Weldment Bases

Ratings

Amperes, RMS

Short-Time

Fault-Closing,

Nom . Max . BIL Cont .

Duty-Cycle,

Mom . 3-Sec . Two-Time

No . of Interrupting Gaps

Application Classifications (see Table 2 on
page 6)

Insulator T .R . No .

Leakage Distance,
Inches (mm)

Catalog Number

Page Reference for Dimensional Informa-
tion

1600 70 000 43 750

40 000

EMN

368

231 (5867)

357363

345 362 1300

2000 80 000 50 000

40 000

EMN

368

231 (5867)

557363

Circuit-switchers do not include connectors . Refer to Table 8 on page 14 . Circuit-switchers are furnished with gray (Munsell Number 5 BG 7 .0/014) station post insulators .
These circuit-switchers cannot be furnished with manual operating handles .
Shunt-trip device is available with all power-operated center-break style Mark V Circuit-Switchers .
For center-break style circuit-switchers, blade opening direction, as viewed from interrupter end, is to the left .
For complete information refer to the “Basis of Fault-Closing Ratings” section on page 2 .

If the circuit-switcher is to be installed on a structure other than S&C Mounting Pedestals (see Table 13 on page 17), detailed drawings of the user-furnished mounting structure must be supplied at the time of order . Please contact your nearest S&C Sales Office for details .
Not applicable for fault-interrupting duty . Also suitable for three-phase transformers and three-phase banks of single-phase transformers connected solidly grounded-wye on the primary (circuit-switcher) side, solidly grounded-wye on the secondary side, with a delta-connected tertiary .

Table 6 . Circuit-Switchers–Three-Pole Integer Style

Ratings

Amperes, RMS

Nom . Max . BIL

Cont .

Short-Time Mom . 3-Sec .

FaultClosing, Duty-Cycle, Two-Time

34 .5 38 200 1200 61 000 40 000 30 000

46 48 .3 250 1200 61 000 40 000 30 000

69 72 .5 350 1200 61 000 40 000 30 000

No . of Interrupting Gaps
1
1
1
2

Application Classifications (see Table 2 on
page 6)
BEFGHJKLMPR
BEFGHJKLMPR
BEFGHJKMP
BEFGHJKLMPR

Insulator T .R . No .

Leakage Distance,
Inches (mm)

Catalog Number

Vertical Operating Shaft Inboard

Vertical Operating
Shaft Outboard
on Right

Page Reference for Dimensional Informa-
tion

210

37 (940)

157914

157814

214

43 (1092)

157915

157815

216

72 (1829)

157916

157816

216

72 (1829)

157926

157826

10 S&C Specification Bulletin 711-31 .

Ordering Tables

Table 7 . Optional Features–For Mark V Circuit-Switchers

Item

Suffix to be Added to
Circuit-Switcher Catalog Number

Applicable to Circuit-Switcher

Style

Rating, kV

Pre-assembled Mark V Circuit-Switcher–provides three pole-units, each consisting of a brain and interrupter assembly, integral disconnect blade, jaw-contact assembly, terminal adapter, support insulators, channel base, and shunt-trip device (when applicable)–all factory-assembled and adjusted

Vertical-break

69 thru 161

-A

Center-break

230

34 .5 thru 69

Shunt-trip device, 48-Vdc control voltage–provides 8-cycle maximum interrupting time

for Mark V Circuit-Switcher operated by a Type CS-1A Switch Operator . Not available with

-T1

manually operated circuit-switchers

115 and 138

All

161

230

345

34 .5 thru 69

Shunt-trip device, 125-Vdc control voltage–provides 8-cycle maximum interrupting time

for Mark V Circuit-Switcher operated by a Type CS-1A Switch Operator . Not available with

-T2

manually operated circuit-switchers

115 and 138

All

161

230

345

Bypass accessory, single-pole, stick-operated, set of three, 800 amperes continuous, 20,000 amperes momentary rating–permits exercising of the circuit-switcher and checkout of relaying equipment without opening high-voltage circuit

34 .5

Integer and vertical-break

-B1

115 Vertical-break
138

34 .5

Bypass accessory, single-pole, stick-operated, set of three, 1200 amperes continuous, 61,000 amperes momentary rating–permits exercising of the circuit-switcher and checkout of relaying equipment without opening high-voltage circuit

Vertical-break

-B2

115

138

161

Center-break

230

Extra-performance closing contacts–provide increased contact life for 34 .5-kV through 138-kV vertical-break and integer style circuit-switchers in applications where load in excess of 550 amperes is switched frequently . Each pole-unit set consists of one copper-tungsten arcing-tip assembly in substitution for the standard stainless steel arcing-tip assembly and one carbon arcing-rod assembly with support clamp

-C1

Integer and vertical-break

34 .5 thru 138

Shunt-trip device control voltage should be the same as switch operator motor and control voltage .
For shunt-trip insulated operating shafts equipped with resistance-graded (conductive glaze) insulators, refer to your nearest S&C Sales Office .
Extra-performance closing contacts (catalog number suffix “-C1”) cannot be used in conjunction with pre-insertion inductors (catalog number suffix “-P5,” “-P51,” “-P6,” or “-P61”), and vice versa .

Extra-performance closing contacts can be used on 115-kV and 138-kV circuit-switchers only at installations where the jaw contacts are connected to the source and the interrupters are connected to the load .
Requires rigid bus connections at rotating-insulator end of the circuit-switcher . To reduce circuit-switcher deflection during opening and closing operations–which can loosen the bus connections–doubleacting shock absorbers (catalog number suffix “-H”) are recommended .

TABLE CONTINUED

. S&C Specification Bulletin 711-31 11

Ordering Tables

Table 7 . Optional Features–For Mark V Circuit-Switchers–Continued

Item

Suffix to be Added Applicable to Circuit-Switcher

to Circuit-Switcher Catalog Number

Style

Rating, kV

34 .5

Grounding switch, manual, three-pole, group-operated, 61,000 amperes momentary rating,

with flexible straps for current transfer at hinge end of blades, and with 90° opening blades

-G2

parallel to bases when in open position . Includes manual operating handle

All

115

138

161

230

Grounding switch, manual, three-pole, group-operated, 80,000 amperes momentary rating, with flexible straps for current transfer at hinge end of blades, and with 90° opening blades perpendicular to bases when in open position . Includes manual operating handle

-G4

Center-break

230

34 .5

Grounding switch, manual, three-pole, group-operated, 61,000 amperes momentary rating, with flexible straps for current transfer at hinge-end of blades, and with 90° opening blades perpendicular to bases when in open position . Includes manual operating handle

-G22

46 Vertical-break

and

center-break 115

138

Grounding switch, manual, three-pole, group-operated, 61,000 amperes momentary rating, with braidless current transfer at hinge-end of blades, and with 90° opening blades perpendicular to bases when in open position . Includes manual operating handle

-G23

Vertical-break

and

161

center-break

Double-acting shock absorbers–for center-break style circuit-switchers with extruded-aluminum weldment bases . Reduce deflection during opening and closing operations

-H

Center-break

230

Key type interlock, for use on grounding switch (catalog number suffix “-G2” or “-G4”), key to

be matched with “Key Interlock with Switch” as optionally furnished with S&C Switch Oper-

ators and/or other interlocked device(s) . See the “Accessories for Switch Operators” table

-L

in S&C Specification Bulletin 719-31, catalog number suffix “-L”; or Table 10 on page 15,

catalog number suffix “-L”

All

International crating . Wood used is either hardwood or certified by the supplier as “Heat treated (kiln dried) to a core temperature of 133°F (56°C) for a minimum of 30 minutes”

-L71

All

Low-temperature interrupters . For applications where temperature regularly falls below 40°F (40°C) . Includes modified red target indicators

-N2

All

Grounding switches opening parallel to bases can only be applied at interrupter end for center-break style circuit-switchers .
Grounding switches can be applied at rotating-insulator end of center-break style circuit-switchers only by extending bases and adding extra insulator stacks . Refer to your nearest S&C Sales Office .

Pre-assembly option “-A” must be specified when ordering grounding switch .
Recommended for circuit-switchers furnished with bypass accessory (catalog number suffix “-B2″) . Included as standard equipment on circuitswitchers furnished with standard-duty pre-insertion inductors (catalog number suffix”-P5″ or “-P51”) .

TABLE CONTINUED

12 S&C Specification Bulletin 711-31 .

Ordering Tables

Table 7 . Optional Features–For Mark V Circuit-Switchers–Continued

Item Pre-insertion inductors

For Capacitor Bank

System Voltage Rating, kV,
Nom .

Size, MVAC

Suffix to be Added to Circuit-Switcher
Catalog Number

Applicable to Circuit-Switcher

Style

Rating, kV

3 to 11 34 .5
12 to 22
4 to 18 46
19 to 36

-P6 -P61 -P6 -P61

34 .5
Integer and vertical-break
46

enhanced-duty pre-insertion inductors– for circuit-

switchers in single-bank capacitor switching applications . Limit inrush current, overvoltage, and audible noise at

5 to 20

-P6

capacitor bank bus . Also limit switching-surge overvoltages

at remote transformers . Not available with manually operated circuit-switchers

Integer (1 gap)

Integer (2 gap)

Vertical-break

Integer (1 gap)

21 to 42

-P61

Integer (2 gap)

Vertical-break

115

10 to 60

-P6

138

13 to 75

115 Vertical-break
138

Standard-duty pre-insertion inductors– for circuitswitchers in single-bank capacitor switching applications . Limit inrush current, overvoltage, and audible noise at capacitor bank bus . Also limit switching-surge overvoltages at remote transformers . Not available with manually operated circuit-switchers

34 .5

3 to 33

4 to 44

5 to 65

115

10 to 84

138

13 to 81

-P5 -P -P51
-P5

Integer and

34 .5

vertical-break

Integer and vertical-break

Integer (1 gap)

Integer (2 gap)

Vertical-break

115 Vertical-break
138

230

17 to 198

Center-break

230

Extra-performance closing contacts (catalog number suffix “-C1”) cannot be used in conjunction with pre-insertion inductors (catalog number suffix “-P5”, “-P51”, “-P6”, or “-P61”), and vice versa .
Circuit-switchers equipped with pre-insertion inductors are not suitable for fault-closing duty .
Circuit-switchers equipped with pre-insertion inductors are capable of two consecutive closing operations 5 minutes apart, followed by one closing operation every hour .
In some instances, especially for grounded capacitor banks up to 69 kV, larger-size capacitor banks may be accommodated . Refer to your nearest S&C Sales Office .
For multiple bank (back-to-back) capacitor switching applications or for systems rated above 138 kV, refer to your nearest S&C Sales Office .

Includes high-strength insulators (T .R . number 278) at jaw-contact end, insulator mounting weldments, and jaw-contact-end mounting brackets .
Catalog number suffix “-P5” pre-insertion inductors generally limit, to 2 per unit, overvoltages on unloaded open-ended lines up to 30 miles (48 km) from 5- to 20-MVAC capacitor banks, up to 50 miles (80 km) from 21- to 65-MVAC capacitor banks . For effectiveness up to 50 miles (80 km) from 5- to 20-MVAC capacitor banks, specify catalog number suffix “-P51 .”
Includes jaw-contact-end mounting brackets necessary to attain 0 .2 ground acceleration seismic loading capability .
Includes double-acting shock absorber on each pole-unit to reduce circuit-switcher deflection during opening and closing operations .

TABLE CONTINUED

. S&C Specification Bulletin 711-31 13

Ordering Tables

Table 7 . Optional Features–For Mark V Circuit-Switchers–Continued

Item

Suffix to be Added to Circuit-Switcher
Catalog Number

Applicable to Circuit-Switcher Voltage, Nom ., kV

34 .5

Mark V Circuit-Switcher furnished less insulators

115 -Z1
138

161

230

345

Mark V Circuit-Switcher furnished with insulators of the next lower voltage rating Mark V Circuit-Switcher furnished with insulators of the next higher voltage rating

Voltage, Nom ., kV From Æ To

46 Æ 34 .5

69 Æ 46

115 Æ 69

-Z2

138 Æ 115

161 Æ 138

230 Æ 161

34 .5 Æ 46

46 Æ 69

69 Æ 115

-Z3

115 Æ 138

138 Æ 161

161 Æ 230

Not available for integer-style switches .

In instances where insulators of the next-lower or next-higher voltage rating have different bolt-circle dimensions, adapters are required; refer to your nearest S&C Sales Office .

Table 8 . Connectors

Illustration

Description
Standard bronze pad terminal, four-bolt, tin plated . Includes ½-inch galvanized steel hardware for attachment to terminal pads of the circuit-switchers
Standard aluminum-alloy pad terminal, four-bolt . Includes ½-inch galvanized steel hardware for attachment to terminal pads of circuit-switchers

Accommodating Conductor
2/0 stranded (89 .0 mm2) through 800 kc mil (538 .6 mm2) copper
4/0 stranded (141 .3 mm2) through 1000 kc mil (672 .5 mm2) copper
250 kc mil (167 .5 mm2) through 400 kc mil (268 .5 mm2) copper or aluminum
350 kc mil (235 .0 mm2) through 600 kc mil (404 .1 mm2) copper or aluminum
600 kc mil (404 .1 mm2) through 900 kc mil (606 .4 mm2) copper or aluminum
900 kc mil (606 .4 mm2) through 1250 kc mil (841 .9 mm2) copper or aluminum

Catalog Number 4568R1 4569R1 5329 5331 5333 5334

Connectors listed are suitable only for applications through 161 kV . For connectors for higher voltage applications, contact the nearest S&C Sales Office .

Add suffix letter to the catalog number to specify appropriate mounting bolt length as follows: “-A” for ½13×1 “-B” for ½13×1½ “-C” for ½13×2

14 S&C Specification Bulletin 711-31 .

Ordering Tables

Table 9 . S&C Manual Geared Operating Handle–For Mark V Circuit-Switchers

Manual geared operating handle

Item

Includes appropriate flexible coupling for connection of output shaft of operating handle to vertical operating pipe of the circuit-switcher . For other applications of manual geared operating handle, specify flexible coupling matched to size of vertical operating pipe . See Table 10 .
Manual operating handles are available with all integer-style and vertical-break style circuit-switchers, and with all center-break style circuit-switchers with extruded-aluminum weldment bases . Manually

Catalog Number
5291
operated circuit-switchers have no fault-closing ratings, and cannot be provided with shunt-trip device .
The degree of simultaneity of opening and closing of the three poleunits of a manually operated circuit-switcher is dependent on the proper installation and adjustment of the operating mechanism–as well as on the speed of cranking at the operating handle–and must be considered in establishing ground-relay settings .

Table 10 . Accessories–For Manual Geared Operating Handle
Item
Flexible coupling–for use with 1½-inch IPS vertical operating pipe (comes standard when manual geared operating handle is ordered with a circuit-switcher) Flexible coupling–for use with 2-inch IPS vertical operating pipe (comes standard when manual geared operating handle is ordered with a circuit-switcher) Flexible coupling–for use with 2½-inch IPS vertical operating pipe (comes standard when manual geared operating handle is ordered with a circuit-switcher) Flexible coupling–for use with 3-inch IPS vertical operating pipe (comes standard when manual geared operating handle is ordered with a circuit-switcher) Key interlock, locks circuit-switcher open Auxiliary switch (individually adjustable contacts), 4-PST–coupled to circuit-switcher Auxiliary switch (individually adjustable contacts), 8-PST–coupled to circuit-switcher
The 4-PST Auxiliary Switch (catalog number suffix “-Q”) cannot be furnished if the 8-PST version (catalog number suffix “-W”) is specified, and vice versa .

Suffix to be Added to Operating Handle Catalog Number -F1
-F2
-F3
-F4 -L -Q -W

. S&C Specification Bulletin 711-31 15

Ordering Tables

Table 11 . Spare or Replacement Interrupters–For Mark V Circuit-Switchers

Item

For Mark V Circuit-Switcher

Style

No . of Interrupting Gaps

Integer

Interrupter,

single-gap

Vertical-break and center-break

Interrupter, 2-gap

Integer vertical-break and center-break

Interrupter, 3-gap

Vertical-break and center-break

When ordering, please state mounting position of circuit-switcher, viz ., upright or vertical .
Elastomeric-seal interrupters exhibiting low gas-pressure indication (red target) and having porcelain housing in good condition can be exchanged for new interrupters . Elastomeric-seal interrupters can be identified by the dome-shaped pressure-relief vent cover . To ensure proper handling, refer to the nearest S&C Sales Office and obtain a special serially numbered label to place on the shipping container . Enclose a packing slip showing purchase order or requisition number covering the exchange and ship the replaced interrupter, transportation

Obsolete Catalog Number
SA-40315 SA-40316
SA-40316

Replacement Catalog Number

Replacement Catalog Number (Low-Temperature)

SA-43826-A SA-43827-A

SA-43826-1-A SA-43827-1-A

SA-43827-A

SA-43827-1-A

SA-40317

SA-43828-A

SA-43828-1-A

SA-40318

SA-43829-A

SA-43829-1-A

charges prepaid, to S&C Electric Company, Repair Center, 1800 Devon Avenue, Chicago, Illinois 60660-1010 . Low-temperature interrupter intended for circuit-switchers with the “-N2” option . For use on circuit-switcher catalog numbers:
157814, 157815, 157816 157914, 157915, 157916
For use on circuit-switcher catalog numbers:
157886, 157986

Table 12 . Parts
Item SF6 reclamation tool–assists reclaiming SF6 from discontinued solder-seal interrupters . (Solder-seal interrupters have flat pressure-relief vent cover .) User-furnished SF6 reclamation equipment required

Catalog Number SXA-2213

16 S&C Specification Bulletin 711-31 .

Ordering Tables

Table 13 . Mounting Pedestals and Anchor Bolts–For Mark V Circuit-Switchers

Item Mounting pedestals (one per set), single rectangular tubular column, formed steel plate construction, galvanized finish
Mounting pedestals, set of two, square steel tube construction, complete with Circuit-Switcher support frame, galvanized finish
Mounting pedestals, set of six, square steel tube construction galvanized finish

For Circuit-Switcher

Style

Rating, kV

Phase Spacing, Inches
(mm)

Column Section, Inches
(mm)

Integer

34 .5 thru 69 1 and 2 gaps

1018 (254457)

Vertical-break and
center-break

69 thru 115 1 and 2 gaps

96 (2438)

1212 (305305)

Vertical-break

138 1, 2, and 3 gaps

96 (2438)

1212 (305305)

Center-break

138 1, 2, and 3 gaps

108 (2743)

1212 (305305)

Vertical-break

161 2 and 3 gaps

Vertical-break and
center-break

161 2 and 3 gaps

108 (2743)

1212 (305305)
1414 (356356)

123 (3124)

1212 (305305)
1414 (356356)

230

3 gaps extrud-

Not

1212

ed-aluminum applicable (305305)

weldment bases

Center-break

345 3 gaps aluminum-sheathed steel weldment
bases

Not

1616

applicable (406406)

Column Height, Feet (mm)
8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658) 8 (2438) 9 (2743) 10 (3048) 11 (3353) 12 (3658)
10 (3048)
11 (3353)
12 (3658)

Catalog Number
92450R1-G 92451R1-G 92452R1-G 92453R1-G 92454R1-G 90100R1-G 90101R1-G 90102R1-G 90103R1-G 90104R1-G 90100R1-G 90101R1-G 90102R1-G 90103R1-G 90104R1-G 90120R1-G 90121R1-G 90122R1-G 90123R1-G 90124R1-G 90120R1-G 90121R1-G 90132R1-G 90133R1-G 90134R1-G 90140R1-G 90141R1-G 90152R1-G 90153R1-G 90154R1-G 90180R1-G 90181R1-G 90182R1-G 90183R1-G 90184R1-G
90162R3-G
90163R3-G
90164R3-G

Anchor Bolts Qty . Catalog Req’d . Number
4 S-81365-2
8 S-81365-1
8 S-81365-2 8 S-81365-1 8 S-81365-2 24 S-81365-2 24 S-81365-3

Mounting pedestals of less than 12-foot (366-cm) column height may be furnished in intermediate heights–in 3-inch (76-mm) increments, as shown in the table below . Add the appropriate suffix to the mounting pedestal set catalog number .

Additional Column Heights, Inches (mm)
3 (76) 6 (152) 9 (229)

Mounting Pedestal Catalog Number Suffix -S3 -S6 -S9

NOTe: Maximum standard column height is 12 feet (366 cm) .
Each anchor bolt is of galvanized steel and is furnished with two hex nuts and two flat washers to facilitate leveling the mounting pedestals .

Nominal sizes of anchor bolts are as follows, in inches:
S-81365-1: 1×33
S-81365-2: 1¼×44
S-81365-3: 1½×55
If mounting pedestals are to be used with integer-style circuitswitchers that are equipped with the shunt-trip device, add suffix “-T” to the catalog number .
Vertical-break style circuit-switchers, one, two, or three gaps, rated 138 kV, will also fit these mounting pedestals .
Phase spacing for integer-style circuit-switchers is fixed by the dimensions of the mounting frame and is 41 inches (104 cm) for circuit-switchers rated 34 .5 kV and 46 kV, and 51 inches (130 cm) for circuit-switchers rated 69 kV .

. S&C Specification Bulletin 711-31 17

Dimensional Drawings
Three-Pole Vertical-Break Style 34 .5 kV through 161 kV

Dimensions in inches (mm)

10¼ (260)

8¼ (210)

1¾ (44) 1¾ (44)

5 (143)

(16)

(14) DIA . (4 HOLES)

7 (194)

1¾ (44)
1¾ (44)

(16)

18 S&C Specification Bulletin 711-31 .

Dimensional Drawings

Catalog Number

157314

A1
46½ (1181)

A2
34 (873)

C
96 (2438)

Dimensions in Inches (mm)

11 (283)

29 (737)

6 (152)

M
74¼ (1886)

R
56¼ (1429)

S
44¾ (1137)

Net Wt . per Pole-Unit, Lbs . (kg)
680 (308)

157315 157316 157326 157318 157328 157329 157369 157320 157360

50½ (1283)
58½ (1486)
58½ (1486)
75 (1921)
75 (1921)
84 (2149)
84 (2149)
92 (2353)
92 (2353)

38 (975)
46 (1178)
46 (1178)
63½ (1613)
63½ (1613)
72½ (1842)
72½ (1842)
80½ (2045)
80½ (2045)

104 (2642)
110 (2794)
118 (2997)
128 (3251)
138 (3505)
146 (3708)
165 (4191)
154 (3912)
173 (4394)

13 (333)
11 (283)
11 (283)
11 ( 283)
12 (308)
11 (283)
11 (283)
11 (283)
11 283)

33 (838)
43 (1092)
43 (1092)
61 (1549)
61 (1549)
71 (1803)
71 (1803)
79 (2007)
79 (2007)

6 (152)
6 (152)
6 (152)
7 (178)
7 (178)
7 (178)
7 (178)
7 (178)
7 (178)

82¼ (2089)
100¼ (2546)
100¼ (2546)
136 (3464)
136 (3464)
155 (3947)
155 (3947)
171 (4353)
171 (4353)

60¼ (1530)
68¼ (1734)
68¼ (1734)
85 (2169)
85 (2169)
94 (2397)
94 (2397)
102 (2600)
102 (2600)

44¾ (1137)
44¾ (1137)
52 (1343)
44¾ (1137)
52 (1343)
52 (1343)
71½ (1816)
52 (1343)
71½ (1816)

740 (336)
850 (386)
890 (404)
1145 (519)
1185 (538)
1275 (578)
1390 (630)
1375 (624)
1490 (676)

Connectors not included . For available connectors refer to Table 8 on page 14 . Circuit-Switchers are furnished with gray (Munsell Number 5 BG 7 .0/014) station post insulators .

Manual operating handle not included . (See Table 9 on page 15 .)
Shunt-trip device is available with all power-operated vertical-break style Mark V Circuit-Switchers .

. S&C Specification Bulletin 711-31 19

Dimensional Drawings
Three-Pole Center-Break Style with extruded-aluminum weldment bases 230 kV
Dimensions in inches (mm)

14½ (368)

12¾ (324)

1¾ (44) 1¾ (44)

6½ (165)

(22)

(14) DIA . (4 HOLES)

1¾ (44)
1¾ (44) (22)

11 (279)
20 S&C Specification Bulletin 711-31 .

96 (2438)

Dimensional Drawings

Catalog

Dimensions in Inches (mm)

Net Wt . per

Number

Pole-Unit,

Lbs . (kg)

657361R2

99 (2515)

103 (2616)

197 (5004)

5 (127)

51¾ (1314)

54½ (1384)

112¾ (2864)

112½ (2858)

79½ (2019)

1850 (839)

757361R2

100¼ (2546)

104½ (2654)

201 (5105)

7½ (191)

51¼ (1302)

56¼ (1429)

114 (2896)

114¼ (2902)

83½ (2121)

1958 (888)

Connectors not included . For available connectors refer to Table 8 on page 14 . Circuit-switchers are furnished with gray (Munsell Number 5 BG7 .0/014) station post insulators .
Manual operating handle not included . (See Table 9 on page 15 .)
Shunt-trip device is available with all power-operated center-break style Mark V Circuit-Switchers .
For center-break style circuit-switchers, blade opening direction, as viewed from interrupter end, is to the left .

Flexible-conductor connections are recommended at both ends of all center-break style circuit-switchers with extruded-aluminum weldment bases, except when the bypass accessory (catalog number suffix “-B2”) is furnished . In this instance, rigid bus connections are necessary at the rotating-insulator end . To reduce circuit-switcher deflection during opening and closing operations–which can loosen the bus connections–double-acting shock absorbers (catalog number suffix “-H”) are available and are recommended .

. S&C Specification Bulletin 711-31 21

Dimensional Drawings
Three-Pole Center-Break Style with aluminum-sheathed weldment bases 345 kV
Dimensions in inches (mm)

15 (381) 21
(533)

(17) DIA . (4 HOLES)

(17) DIA . (4 HOLES) 15 (381)

153 (3886)

21 (533)

49¾ (1264)

1¾ 6½ (44) (165) 1¾ (44)
(22)

(14) DIA . (4 HOLES)

1¾ (44)

(22)

1¾ (44)

148¾ (3778)
135 (3429)

22 S&C Specification Bulletin 711-31 .

134 (3404)

11 (279)

Dimensional Drawings

Catalog

Number

Dimensions in Inches (mm)

Net Wt . per

Pole-Unit,

Lbs . (kg)

357363

139 (3531)

231 (5867)

5 (127)

70¾ (1797)

74½ (1892)

150½ (3823)

79½ (2019)

4775 (2166)

557363

140¼ (3562)

235 (5969)

7½ (191)

71¼ (1810)

78 (2003)

152 (3861)

83½ (2121)

4900 (2223)

Shunt-trip device is available with all power-operated center-break style Mark V Circuit-Switchers .
For center-break style circuit-switchers, blade opening direction, as viewed from interrupter end, is to the left .

. S&C Specification Bulletin 711-31 23

Dimensional Drawings

Three-Pole Integer Style 34 .5 kV through 69 kV

Dimensions in inches (mm)

1¾ (44) 1¾ (44)

7 (194)

(16)

(14) DIA . (4 HOLES)

5 (143)

1¾ (44)
1¾ (44)

(16)

7 (178)

5 (127) BEARING PROJECTION

8¼ (210)

¾ (19) DIA . (8 HOLES) (22)

4 (105) 2½

2½

(64) 13½ (343) 13½ (343)

(64)

24 S&C Specification Bulletin 711-31 .

Dimensions in inches (mm)
15 (381)
13¼ (337)

Dimensional Drawings

15 (381)

13¼ (337)

ILLUSTRATeD 34 .5-kV AND 46-kV INBOARD OPeRATING SHAFT

TOP VIeW

ILLUSTRATeD 69-kV OUTBOARD OPeRATING SHAFT

Catalog Number

Dimensions in Inches (mm)

Vertical Operating
Shaft Inboard

Vertical Operating
Shaft Outboard on Right

Net Wt .

per

Integer-Unit,

Lbs . (kg)

157914

157814

44¾ 32

57½

37¼

(1137) (829) (2337) (1461) (1041) (946)

29 (737)

26 (660)

54½

72½

(1384) (1842)

2250 (1021)

157915

157815

48¾ 36

57½

37¼

(1238) (930) (2337) (1461) (1041) (946)

33 (838)

26 (660)

58½

80½

(1486) (2045)

3040 (1379)

157916

157816

56¾ 44

112

37¼

(1441) (1133) (2845) (1397) (1295) (946)

43 (1092)

30½ (775)

66½

98½

(1689) (2502)

3250 (1474)

157926

157826

56¾ 44

112

(1441) (1133) (2845) (1575) (1295) (1343) (1092)

30½ (775)

66½

98½

(1689) (2502)

3600 (1633)

Connectors not included . For available connectors refer to Table 8 on page 14 . Circuit-Switchers are furnished with gray (Munsell Number 5 BG7 .0/014) station post insulators .
Manual operating handle not included . (See Table 9 on page 15 .)

Shunt-trip device is available with all power-operated vertical-break style Mark V Circuit-Switchers .
As viewed from interrupter end .

. S&C Specification Bulletin 711-31 25

Documents / Resources

SandC Mark Circuit Switcher Switching and Protection [pdf] Instruction Manual
Mark Circuit Switcher Switching and Protection, Switcher Switching and Protection, Switching and Protection, and Protection

References

User Manual

SandC Mark Circuit Switcher Switching and Protection Instruction Manual

Mark Circuit Switcher Switching and Protection

Product Information

Specifications

Product Usage Instructions

Conditions of Sale

Special To This Product

Mounting of Circuit-Switchers

Exclusions

FAQ

Q: What is the voltage range for the Mark V
Circuit-Switchers?

Q: Are connectors included with the Circuit-Switchers?

Q: What is required for high-speed tripping of power-operated
Circuit-Switchers?

Documents / Resources

References

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