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NEMA SG 3

1995 Edition, January 1, 1995

Complete Document

Power Switching Equipment



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Description / Abstract:

This standards publication covers:

a.  Low-voltage power circuit breakers rated 1000 volts AC or less:

   1.  Low-voltage AC power circuit breakers
   2.  Low-voltage AC integrally fused power circuit breakers
   3.  Low-voltage AC power circuit protectors
   4.  Functional components for circuit breakers listed above for
       remote closing, remote opening, automatic opening, auxiliary
       contacts, attachments; etc.
   5.  Renewal and spare parts designed exclusively for use in the
       products enumerated above and not included in the scope of some
       other subdivision

b.  Low-voltage power circuit breakers rated 3200 volts DC or less:

   1.  General purpose DC power circuit breakers
   2.  General purpose DC power circuit breakers for mining applications
   3.  Semi-high-speed DC circuit breakers
   4.  High-speed DC circuit breakers
   5.  Rectifier circuit breakers
   6.  Field discharge circuit breakers
   7.  Functional components for circuit breakers listed above for
       remote closing, remote opening, automatic opening, auxiliary
       contacts, attachments; etc.
   8.  Renewal and spare parts designed exclusively for use in the
       products enumerated above and not included in the scope of some
       other subdivision
ANSI/NEMA MW 1000, 2014