NEMA C37.12-1991
AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Specifications Guide

Standard No.

NEMA C37.12-1991

Release Date

1991

Published By

National Electrical Manufacturers Association（NEMA)

Status

Withdraw

Latest

NEMA C37.12-1991

NEMA C37.12-1991 history

• 1991 NEMA C37.12-1991 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Specifications Guide