范围1。1本标准的要求包括塑壳断路器、断路器和接地故障断路器、熔断断路器、高故障保护器和高故障模块。这些断路器专门用于根据附录B参考1中的国家安装规范提供服务入口、馈线和分支电路保护。本标准还包括瞬时跳闸断路器（断路器），根据附录B中的国家安装规范，参考1.1.2本标准包括塑壳开关和熔合塑壳开关，该断路器专门用作组合电机控制器的一部分- 箱子开关。1.3本标准涵盖额定值为1000伏交流、1500伏直流或以下以及6000安培或以下的设备。1.4 1.1和1.2中提到的设备旨在安装在整体外壳中，或作为其他设备（如配电盘）的一部分。组合的可接受性将在对整个产品进行调查时确定。1.5本标准涵盖用于1.1和1.2.1.6中所述装置的断路器外壳和附件装置。本标准不包括附录B，参考3和参考4中所涵盖的低压电力断路器或附录B，参考5.1.7中所涵盖的补充保护器。本标准包含了对模塑材料要求的补充- 外壳断路器:a）船用；b） 海军用途；c） 不间断电源使用；d） 分类断路器；e） 可编程组件中的软件；f） 带电子过电流保护的断路器的附加试验；g） 电磁兼容性（EMC）——断路器的要求和试验方法；andh）带额外电机过载保护的塑壳断路器。

Scope1.1The requirements of this standard cover molded-case circuit breakers, circuit breaker and ground-fault circuit-interrupters, fused circuit breakers, high-fault protectors, and high-fault modules. These circuit breakers are specifically intended to provide service entrance, feeder, and branch circuit protection in accordance with the National Installation Codes in Annex B, Ref. No.1. This standard also covers instantaneous-trip circuit breakers (circuit interrupters) specifically intended for use as part of a combination motor controller in accordance with the National Installation Codes in Annex B, Ref. No. 1.1.2This standard covers molded-case switches and fused molded-case switches.1.3This standard covers devices rated at 1000 volts ac and 1500 volts dc or less and 6000 amperes or less.1.4The devices referenced in 1.1 and 1.2 are intended for installation in an overall enclosure or as parts of other devices such as panelboards. The acceptability of the combination will be determined when the complete product is investigated.1.5This standard covers circuit-breaker enclosures and accessory devices intended for use with the devices described in 1.1 and 1.2.1.6This standard does not cover low-voltage power circuit breakers covered in Annex B, Ref. No. 3 and Ref. No. 4 or supplementary protectors covered in Annex B, Ref. No. 5.1.7This standard contains supplements covering the requirements for molded-case circuit breakers for:a) Marine Use;b) Naval Use;c) Uninterruptible Power Supply Use;d) Classified Circuit Breakers;e) Software in Programmable Components;f) Additional Tests for Circuit Breakers with Electronic Overcurrent Protection;g) Electromagnetic Compatibility (EMC) – Requirements and Test Methods for Circuit Breakers; andh) Molded-Case Circuit Breakers with Additional Motor Overload Protection.