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ANSI C37.50-2012


Low-Voltage AC Power Circuit Breakers Used in Enclosures ù Test Procedures

Covers the test procedures for enclosed low-voltage ac power circuit breakers as follows:a) Stationary or drawout circuit breakers of two-, three-, or four-pole construction, with one or more rated maximum voltages of 635 V (600 for units incorporating fuses), 508 V, and 254 V for application on systems having nominal voltages of 600, 480, and 240 V; b) Unfused or fused type circuit breakers; c) Manually operated or power operated circuit breakers with or without electromechanical or solid-state trip devices; d) Fused drawouts consisting of current-limiting fuses in a drawout assembly intended to be connected in series with a low-voltage ac power circuit breaker to form a non-integrally fused circuit breaker. This document applies to both integrally and non-integrally fused circuit breakers.
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