ANSI C37.06a-1989
Switchgear - AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities

Standard No.

ANSI C37.06a-1989

Release Date

1989

Published By

American National Standards Institute （ANSI)

Latest

ANSI C37.06a-1989

Scope

This standard incorporates an alternative 3000 ampere rating to the existing 2000 ampere rating for the maximum rated voltage of 362 kV, rms and the rated short circuit current of 63 kA, rms. Also, table 3 is revised for a new T1 value.

ANSI C37.06a-1989 history

• 1989 ANSI C37.06a-1989 Switchgear - AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities