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在新版的61558-1中,18.5章节,关于漏电流的测试,( [, [6 A. v( ~ B& Z# N
if frequencies above 30 kHz are involved, measurement of touch
& I6 p+ ?- w$ d, ~2 M6 r+ Lcurrent shall include measurement with regard to electric burn effects in addition to the T: `9 r6 ^, y7 p6 N
measurements of Figure J.1. For the burn effects, the unweighted r.m.s. value of the touch
, g8 }9 I7 w* I3 u, f& {' Scurrent is relevant. Unweighted touch current is calculated from the r.m.s. voltage U1,$ G: r. K9 \1 b5 y8 B
measured across the 500 Ω resistor of Figure J1 Annex J.
$ p6 O# u& M3 i- k2 g; y2 u' l% j. I- p1 U0 \* M; m: Z2 c# } `9 H
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?
0 r3 u/ {3 l6 v& f4 N( v- w请各位大侠帮助。 |
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