Full Description

Scope

This guide applies to low-voltage ac power circuit breakers of the 635 V maximum voltage class withseparately-mounted current-limiting fuses for use on ac circuits with available short-circuit currents of 200 000 A (rms symmetrical) or less. Low-voltage ac fused power circuit breakers and combinations of fuses and molded-case circuit breakers are not covered by this guide.This guide sets forth recommendations believed essential for the selection of current-limiting fuses (see NEMA FU-11 and UL 248-1) for use in combination with low-voltage ac power circuit breakers, rated in accordance with IEEE Std C37.13¿¿¿ and applied in metal-enclosed low-voltage power circuit breaker switchgear in accordance with ANSI/IEEE Std C37.20.1¿¿¿.NOTE¿¿¿The combination of a circuit breaker and separately mounted fuses is limited to 600 V based on use maximum voltage ratings.

Abstract

Revision Standard - Superseded.Information to assist in selection of current-limiting fuses for use with low-voltage ac power circuit breakers with separately mounted current-limiting fuses is provided.

Product Details

Published: 03/31/2009 ISBN(s): 9780738158884, 9780738158877, 9780738170114 Number of Pages: 20 File Size: 1 file , 270 KB Redline File Size: 2 files , 2.9 MB Product Code(s): STDSU95870, STDSURL95870