实验目的:
评价组件在潮湿工作条件下的绝缘性能,验证雨、雾、露水或溶雪的湿气不能进入组件内部电路的工作部分,如果湿气进入可能会引起腐蚀、漏电或安全事故。
实验装置
应满足下列要求:
— 对于面积小于0.1m2的组件绝缘电阻不小于400MΩ。
— 对于面积大于0.1m2的组件,测试绝缘电阻乘以组件面积应不小于40MΩ·m2。
BR-PV-WLC Wet Leakage Current Tester with Spray System
Implementation of standards:
IEC 61215:2005 & Ed.3, IEC 61646:2008, IEC 61730-2:2004, UL 1703:2008, VDE 0126-5:2008, VDE 0126-3:2009...
System composition:
Basic framework: Insulating water slot air-conditioning (or constant temperature circulating cistern) detergent conductivity detector surface tension determine instrument spray frame program-controlled insulation voltage tester with Light-Screen safety protection system
Insulation voltage test explains:
IEC 61215/61646/61730, were not given insulation voltage test pass/fail discriminant basis, we quoted UL 1703 "Dielectric Withstand Test" by - as Test discriminant basis, namely: Compression test stage no more than 0.05 mA leakage current. In addition, the program, should not be greater than pressor 500V/s, module belong to capacitive load, we find that moment caused by leakage current charging electric current exceeds.
The insulation and spacings between live parts and accessible conductive parts and between live parts and exposed nonconductivesur faces shall withstand the application of a DC test voltage equal to two times the system voltage plus 1000V without the leakage current between these two points exceeding 50μA DC. The voltage is to be applied in both polarities.
a) 一个浅槽或容器,其尺寸应足够大到能将组件及边框水平放入其中的溶液,有符合以下要求的水或溶液
电阻率: 不大于 3500Ω·cm
表面张力:不大于 3Nm-2
温度: 22℃±3℃
溶液深度应有效覆盖所有表面,不要泡到没有为浸泡而设计的引线盒入口
b) 有相同溶液的喷淋装置。
c) 可提供500V或组件系统电压的较大值 、有电流限制的直流电源。
d) 测量绝缘电阻的设备。