Historical
NEMA ANSI C37.51:2003 (R2010)
For switchgear - Metal-enclosed low-voltage ac power circuit breaker switchgear assemblies - Conformance test procedures
Applies to all metal-enclosed low voltage ac power circuit breaker switchgear assemblies designed, tested and manufactured in accordance with ANSI/IEEE C37.20.1-2002. Errata published February 2011.
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