【国外标准】 IEEE Standard for Low‐Voltage AC (1058 V and Below) Power Circuit Breakers Used in Enclosures

This standard covers the following types and preferred ratings for enclosed low-voltage ac power circuit breakers: a) Stationary-mounted or drawout-mounted type of two-, three-, or four-pole construction with one or more rated maximum voltages of 1058 V, 730 V, 635 V (600 V for units incorporating fuses), 508 V, or 254 V for application on systems having nominal voltages of 1000 V, 690 V, 600 V, 480 V, or 240 V respectively b) Unfused or fused type c) Manually operated or power operated, with… read more or without a trip system d) Fused drawout-mounted assemblies consisting of current-limiting fuses in a drawout-mounted assembly intended to be connected in series with a low-voltage ac power circuit breaker to form a nonintegrally fused circuit breaker In this standard, the term circuit breaker shall mean enclosed low-voltage ac power circuit breaker, either fused or unfused. The term unfused circuit breaker shall mean a circuit breaker without either integrally or nonintegrally mounted fuses, and the term fused circuit breaker shall mean a circuit breaker incorporating current-limiting fuses, whether integrally mounted or nonintegrally mounted. read less