IEEE C37.09a-1991 (Supplement to IEEE C37.09-1979)
IEEE Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

Standard No.

IEEE C37.09a-1991 (Supplement to IEEE C37.09-1979)

Release Date

1992

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Scope

The required load current switching capability and life are defined, and load current switching tests are specified.