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在新版的61558-1中,18.5章节,关于漏电流的测试,' g, a; X7 \% k6 Z! s
if frequencies above 30 kHz are involved, measurement of touch- M) v+ Z) k& q4 l) _
current shall include measurement with regard to electric burn effects in addition to the$ K% r6 ~# n% M
measurements of Figure J.1. For the burn effects, the unweighted r.m.s. value of the touch
6 L. |' a+ U- O# X6 l& x* Ycurrent is relevant. Unweighted touch current is calculated from the r.m.s. voltage U1,
0 R. {* e2 g7 m9 k: Bmeasured across the 500 Ω resistor of Figure J1 Annex J.7 i9 u, D3 F- i& e
3 K8 @9 T* p4 z; K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?: B, c, |- g. l. J2 {
请各位大侠帮助。 |
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