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在60950中拔插头测试里1S后插头L/N，或者L/地，N/地之间残余电压衰减到多少才算合格呢？？？
! D" ~5 d! U3 V标准中： `$ t" j- j, F7 u: a" Z
The relevant time constant is the product of the effective capacitance in microfarads and the
5 p, K) Z( @/ F: a( Weffective discharge resistance in megohms. If it is difficult to determine the effective
6 p3 F' @6 s9 ~ ?capacitance and resistance values, a measurement of voltage decay at the point of external F' \9 V) g V- [
disconnection can be used. When conducting the voltage decay measurement, the result is
6 Z! F/ G* Y( n8 u4 y' ~referred to an instrument having an input impedance consisting of a resistance of
& h6 F. h. l! z$ h100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
/ K5 K1 ]" N' X; J) a) D8 i# UNOTE During an interval equal to one time constant, the voltage will have decayed to 37 % of its original value.
% F# }! ^: Y3 ~) f }" N6 x& q' X4 b- }
注：在经过一段等于一个时间常数的时间，电压将衰减到初始值的37%。( Q* i( H; O6 }8 T9 X; \$ \- n" v5 i
这个怎么理解？？ |
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发表于 2008-1-23 14:52
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如果工作电压更大呢？那需要如何介定呢？