NEMA SG 4-2009
Alternating Current High-Voltage Circuit Breakers

Standard No.

NEMA SG 4-2009

Release Date

2009

Published By

National Electrical Manufacturers Association（NEMA)

Latest

NEMA SG 4-2009

NEMA SG 4-2009 history

• 2009 NEMA SG 4-2009 Alternating Current High-Voltage Circuit Breakers
• 2000 NEMA SG 4-2000 Alternating-Current High-Voltage Circuit Breakers
• 1990 NEMA SG 4-1990 Alternating-Current High-Voltage Circuit Breakers
• 1975 NEMA SG 4-1975 ALTERNATING-CURRENT HIGH- VOLTAGE CIRCUIT BREAKERS; REVISION 1 - NOVEMBER 1977@ EDITORIAL CORRECTION TO REVISION 1 - DECEMBER 1977 (WITHDRAWN)