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在新版的61558-1中,18.5章节,关于漏电流的测试,# Y4 p3 m% Z9 h: i
if frequencies above 30 kHz are involved, measurement of touch
8 }7 T, p9 `9 A0 M7 P/ ccurrent shall include measurement with regard to electric burn effects in addition to the
( E: z9 w, D9 k, }! Mmeasurements of Figure J.1. For the burn effects, the unweighted r.m.s. value of the touch
) G" X, [/ J& Bcurrent is relevant. Unweighted touch current is calculated from the r.m.s. voltage U1,
% R6 _6 j# p0 Qmeasured across the 500 Ω resistor of Figure J1 Annex J., M5 |( V& w6 g0 W; g5 {" g$ Z/ J
! F& H7 }3 s/ ^% S5 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?' n' f- x) F, Z( {. h
请各位大侠帮助。 |
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