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7 年
TN-C 、TN-S 、TN-C-S到底有什么不同? - 搜狐
4、不是TN-C系统节省一根线,而是TN-C-S系统 TN-S系统多了一根线,以采用剩余电流漏电保护功能; 2、剩余电流漏电保护功能是检测漏电电流动作的,其灵敏度高,动作快,保护效果好,可以避免造成损失,缩小漏电事故损失,是目前提倡的一种保护方式!
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