S&C Electric Company

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Series 2000 Circuit-Switchers

Ratings

Voltage and Continuous, Short-Time, and Fault-Closing Current Ratings
kV Amperes, RMS
Nom. Max BIL Cont. Short-Time Fault-Closing,
Duty-Cycle,
One-Time
Mom. 1-Second
69 72.5 350 1200/2000 64 000 40 000 40 000
115 121 550 1200/2000 64 000 40 000 40 000
138 145 650 1200/2000 64 000 40 000 40 000
161 169 750 1200 64 000 40 000 40 000
230 242 900 1200 64 000 40 000 40 000

 

Interrupting Current Ratings

Interrupting Current Ratings for Transformer Switching and Protection
Class Qualifications Maximum Amperes,
Interrupting RMS
Symmetrical
Parallel Switching — 1200/2000
Load Dropping — 1200/2000
Fault Interrupting Primary Faults 69 kV through 138 kV 25 000/40 000
161 kV and 230 kV 20 000
Secondary Faults 4000
Internal faults — see both primary and secondary faults, above

 

Interrupting Current Ratings for Line Switching and Protection
Class Qualifications Maximum Amperes,
Interrupting RMS
Symmetrical
Load Splitting (Parallel
or Loop Switching)		 — 1200/2000
Load Dropping — 1200/2000
Line Dropping 69 kV through 138 kV 400
161 kV 320

 

Interrupting Current Ratings for Cable Switching and Protection
Class Qualifications Maximum Amperes,
Interrupting RMS
Symmetrical
Load Splitting (Parallel
or Loop Switching)		 — 1200/2000
Load Dropping — 1200/2000
Cable Dropping
(Charging Current)		 69 kV through 138 kV 400
161 kV 320
Fault Interrupting 69 kV through 138 kV 25 000
161 kV 20 000

 

Interrupting Current Ratings for Single Shunt Capacitor Bank Switching and Protection
Class Qualifications Maximum Amperes,
Interrupting RMS
Symmetrical
Bank Current Switching Grounded capacitor banks applied on solidly grounded systems only, through 138 kV 400
Ungrounded capacitor banks through 115 kV 400
Fault Interrupting — 25 000

 

Interrupting Current Ratings for Shunt Reactor Switching and Protection
Class Qualifications Maximum Amperes,
Interrupting RMS
Symmetrical
Reactor Current Switching Grounded reactors applied on solidly grounded systems only, through 138 kV 600
Ungrounded reactors, 69 kV only 600
Fault Interrupting — 25 000

For Series Reactor Switching, contact your nearest S&C Sales Office.

For more detailed ratings and application information, see S&C Publication 716-31.