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开关电源供应器外壳上有电流,这种情况正常吗?对人有危害吗?

2020-11-05 18:06

由于EMI(电磁干扰)上的要求,使得一般电源供应器的输入端会经由一些滤噪声电容与FG(外壳)连接,造成外壳带电的现象。而此种现象在IEC60950-1中也有明确的规范,例如:信息设备之漏电流,必须低于3.5mA,而只要正确接地便可解决。

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