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在新版的61558-1中,18.5章节,关于漏电流的测试,
5 [; y" A* K9 o2 gif frequencies above 30 kHz are involved, measurement of touch
+ O$ |# A$ X9 qcurrent shall include measurement with regard to electric burn effects in addition to the3 f5 t; [5 D+ @! L6 ]- \2 a9 m4 c
measurements of Figure J.1. For the burn effects, the unweighted r.m.s. value of the touch7 }6 C7 |. T8 t% A. ~, w3 C# K
current is relevant. Unweighted touch current is calculated from the r.m.s. voltage U1,
4 q! ?. a4 `! t) bmeasured across the 500 Ω resistor of Figure J1 Annex J.9 r/ U5 \& [0 ~* T# m7 ]' u( M
3 j+ {7 `( J# D/ J- J# N也就是说如果开关电源的频率超过30KHz的话,U1就要被测试,还是RMS值, 问题是限值是多少?! j- R1 O! ~, {1 j8 ?8 K% q& _
请各位大侠帮助。 |
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