请注意:此版本的所有临时修订版将在您购买时提供。现场可更换发光二极管（LED）光引擎UL 87531范围1。1本标准规定了适用于现场可更换发光二极管（LED）灯发动机的要求，该发动机的额定电压高达347伏（标称电压），并配有除白炽灯或荧光灯上常见的螺钉、卡口或针型配置以外的整体式灯座。1.2本标准不包括:作为整体组件的LED设备，其构成灯具的不可更换部分，因此无法与灯具分开进行测试；带螺丝、卡口或针型底座的LED灯或轻型发动机，用于替代白炽灯或荧光灯； 除1.1允许的灯座外，具有电源连接方式的orLED轻型发动机，如定制线束。1.3本标准不包括LED灯发动机拟安装的支架、插座等。此类产品包含在UL 8754/ULC-S8754中。

Please note: All interim revisions for this edition available at time of your purchase will be included.Field-Replaceable Light Emitting Diode (LED) Light EnginesUL 87531 Scope1.1 This standard specifies the requirements applicable to field replaceable light-emitting diode (LED) light engines rated up to 347 volts (nominal) and provided with integral lamp bases of other than the screw, bayonet, or pin type configurations typically found on incandescent or fluorescent light sources.1.2 This standard does not cover:LED devices that are integral components and which form a non-replaceable part of a luminaire, such that they cannot be tested separately from the luminaire;LED lamps or light engines with screw, bayonet or pin-type bases, intended as replacements for incandescent or fluorescent lamps; orLED light engines having a means of supply connection other than the lamp bases allowed by 1.1, such as custom wiring harnesses.1.3 This standard does not cover the holders, sockets, and the like to which these LED light engines are intended to be mounted. Such products are covered by UL 8754 / ULC-S8754.