Active PAR

PC37.27

Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately-Mounted Current-Limiting Fuses

This guide applies to unfused low-voltage ac power circuit breakers of the 635 V maximum voltage class with separately-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. In this guide, the term circuit breaker means unfused low-voltage ac power circuit breaker.

Sponsor Committee
PE/SWG - Switchgear
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Status
Active PAR
PAR Approval
2022-09-21
Superseding
C37.27-2015

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/SWG - Switchgear
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Working Group
LVSD-WG_C37.27 - LVSD - IEEE Standard Application Guide for Low-Voltage AC Nonintegrally Fused Power Circuit Breakers (Using Separately Mounted Current-Limiting Fuses)
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IEEE Program Manager
Jennifer Santulli
Contact
Working Group Chair
Marcelo Valdes
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C37.27-2015

IEEE Guide for Low-Voltage AC (635 V and below) Power Circuit Breakers Applied with Separately-Mounted Current-Limiting Fuses

Application recommendations to assist in selection of separately mounted current-limiting fuses to be installed in series with low-voltage ac power circuit breakers are provided in this guide.

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C37.27-1987

IEEE Standard Application Guide for Low-Voltage AC Nonintegrally Fused Power Circuit Breakers (Using Separately Mounted Current-Limiting Fuses)

Low-voltage power circuit breakers of the 600 V insulation class with separately mounted current-limiting fuses, for use on ac circuits with available short-circuit current of 200 000 A (rms symmetrical) or less, are covered. Guidance is provided respecting coordination of circuit breaker and fuse, location of fuses, open fuse trip devices, addition of fuses to existing installations, protection of connected equipment, and tested combinations of circuit breakers and fuses.

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C37.27-2008

IEEE Application Guide for Low-Voltage AC Power Circuit Breakers Applied with Separately-Mounted Current-Limiting Fuses

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.

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No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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