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NEMA SG 4

Alternating Current High-Voltage Circuit Breakers

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Organization: NEMA
Publication Date: 1 January 2009
Status: active
Page Count: 41
scope:

This standards publication encompasses:

a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. Circuit breakers for service in metal-enclosed or metal-clad enclosures and automatic circuit reclosers are excluded.

b. Attachments for these circuit breakers, such as bushing current transformers, bushing potential devices, interlocks, undervoltage trip devices, shunt trips, overcurrent trips, and auxiliaries sold with the circuit breakers such as closing relays and structural steel supports.

c. Renewal, modernizing, and spare parts for these circuit breakers and attachments.

d. Recommended installation, operation, and maintenance procedures.

Document History

NEMA SG 4
January 1, 2009
Alternating Current High-Voltage Circuit Breakers
This standards publication encompasses: a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. Circuit breakers for service in metal-enclosed or metal-clad...
January 1, 2009
Alternating-Current High-Voltage Circuit Breakers
This standards publication encompasses: a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. (Automatic circuit reclosers are excluded.) Circuit breakers for...
January 1, 2000
Alternating-Current High-Voltage Circuit Breakers
This standards publication encompasses: a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. (Automatic circuit reclosers are excluded.) Circuit breakers for...
January 1, 2000
Alternating-Current High-Voltage Circuit Breakers
This standards publication encompasses: a. All ratings for outdoor circuit breakers above 1000 volts for alternating-current service. (Automatic circuit reclosers are excluded.) Circuit breakers for...
January 1, 1990
Alternating-Current High-Voltage Circuit Breakers
A description is not available for this item.
January 1, 1975
ALTERNATING-CURRENT HIGH- VOLTAGE CIRCUIT BREAKERS; REVISION 1 - NOVEMBER 1977, EDITORIAL CORRECTION TO REVISION 1 - DECEMBER 1977 (WITHDRAWN)
A description is not available for this item.

References

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