家具UL认证过程中不可避免的会涉及到各种测试，我们主要说下升降桌UL/家具UL认证过程中会涉及到的各种UL认证相关测试。
 
本期咱们讲一下升降桌UL/家具UL认证的Leakage Current Test认证测试细节。
 
测试针对范围：UL家具内各种产品，内部只要有电气部分存在都会有这个测试。
 
升降桌UL/家具UL测试治具
 
泄露电流表，功率计，泄露电流网络，秒表（设备需要按照UL认证的要求去校验）
 
升降桌UL/家具UL测试方法：
 
针对与有电气部分的UL家具产品都需要考量泄露电流是否符合标准要求。
 
泄露电流网络如下图：

泄露电流限值要求如下：
 

1. 0.5 MIU for a two-wire cord- and plug-connected portable furnishing; and
2. 0.5 MIU for a three-wire (including grounding conductor) cord- and plug-connected portable furnishing; and
3. 0.75 MIU for a three-wire (including grounding conductor) cord- and plug-connected

stationary or fixed furnishing
 
Exception: The leakage current of a furnishing incorporating a sheath type heating element is to be monitored during heat-up and cool-down and shall not exceed 2.5 MIU during the first 5 minutes of energizing the furnishing. At the end of this time, the leakage current shall be not more than the 0.5 MIU or 0.75 MIU limit, as applicable.

测试方法：
 
产品输入120V正常工作状态，前端接入上图UL认证要求网络中，用泄露电流表测量产品金属外壳到地的泄漏电流。
 
如下图分别记录S1open,S1 Closed , S1 Closed 0-5S, S1 Closed 5s~ 10min, S1 Closed 热态后，S1 热态后 open后的测试的结果。


德立弗是UL合作的家具认证实验室，拥有UL962/UL2999/UL970等标准的全套测试能力，欢迎您的咨询！