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灯具的SELV与IT类的的定义是不一样的,电压限值是50Vac rms, 120Vdc , 并且初次级之间是通过符合61558-2-6的安全隔离变压器隔离
ELV (extra low voltage)
voltage which does not exceed 50 V a.c. r.m.s. or 120 V ripple free d.c. between conductors, or
between any conductor and earth
SELV (safety extra low voltage)
ELV in a circuit which is insulated from the mains supply by an insulation not less than that
between the primary and secondary circuits of a safety isolating transformer according to
IEC 61558-2-6 or equivalent
是否可以触及还要根据漏电流和空载电压等测试才能判断 |
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