请注意:此版本的所有临时修订版将在您购买时提供。电动汽车（EV）供电电路的人员保护系统:充电系统用保护装置的特殊要求SUL 2231-21范围1。1本标准应与附录a参考号1一起阅读。除非本标准进行了修改，否则附录a参考1的要求适用。

Please note: All interim revisions for this edition available at time of your purchase will be included.Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: Particular Requirements for Protection Devices for Use in Charging SystemsUL 2231-21 Scope1.1 This Standard is intended to be read together with Annex a, Ref. No. 1. The requirements of Annex a, Ref. No. 1 apply unless modified by this Standard.