IEEE Std C37.20.1-1993
IEEE Standard for Metal - Enclosed Low - Voltage Power Circuit Breaker Switchgear

Standard No.

IEEE Std C37.20.1-1993

Release Date

1993

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Status

Be replaced

Replace By

IEEE Std C37.20.1-2002

Latest

IEEE Std C37.20.1-2015

Scope

Low-voltage metal-enclosed switchgear-which contains either stationary or drawout, manually or electrically operated low-voltage ac or dc power circuit breakers in individual grounded metal compartments, in three-pole, two-pole, or single-pole construction-is covered. Rated maximum voltage levels are 254 V, 508 V, or 635 V (ac) and 300/325 V, 800 V, 1000 V, 1200 V, 1600 V, or 3200 V (dc). The standard deals with service conditions, ratings, temperature limitations, and classification of insulating materials, insulation (dielectric) withstand voltage requirements, test procedures, and application.

IEEE Std C37.20.1-1993 history

• 1970 IEEE Std C37.20.1-2015 Armored low-voltage power circuit breaker switchgear (1000 volts and below, 3200 volts and below)
• 2005 IEEE Std C37.20.1/INT 1-2005 IEEE Standards Interpretations for IEEE Std C37.20.1™-1993
• 2002 IEEE Std C37.20.1-2002 Metal-enclosed low-voltage power circuit breaker switchgear
• 1993 IEEE Std C37.20.1-1993 IEEE Standard for Metal - Enclosed Low - Voltage Power Circuit Breaker Switchgear
• 1970 IEEE Std C37.20.1-1987 IEEE Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear