请注意:此版本的所有临时修订版将在您购买时提供。用于光伏（PV）系统的塑壳断路器、塑壳开关和断路器外壳SUL 489B1范围1。1这些要求包括额定值高达1500 V dc的塑壳断路器、塑壳开关和断路器外壳，用于光伏（PV）系统和附录B.1.2参考1。这些要求旨在与附录B参考2中的要求结合使用，除非本标准进行了修改或补充。1.3这些要求不包括用于电池电路的塑壳断路器或塑壳开关。

Please note: All interim revisions for this edition available at time of your purchase will be included.Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures for Use with Photovoltaic (PV) SystemsUL 489B1 Scope1.1 These requirements cover molded-case circuit breakers, molded-case switches, and circuit-breaker enclosures rated up to 1500 V dc, intended for use with photovoltaic (PV) systems and Ref. No. 1 of Annex B.1.2 These requirements are intended to be used in conjunction with the requirements in Ref. No. 2 of Annex B, except as modified or supplemented by this Standard.1.3 These requirements do not cover molded-case circuit breakers or molded-case switches intended for use in battery circuits.