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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???
( b0 U R. R' `* T. B标准中:
$ a6 o2 N; S- Y& [3 Z% jThe relevant time constant is the product of the effective capacitance in microfarads and the
; f% z/ T6 v$ S, c1 c* Beffective discharge resistance in megohms. If it is difficult to determine the effective
8 |5 C5 F' D2 \$ @& ^& X- Xcapacitance and resistance values, a measurement of voltage decay at the point of external0 i$ ^/ d( F0 E, \; g+ \
disconnection can be used. When conducting the voltage decay measurement, the result is9 ~- E5 D) c2 v8 \3 w0 H5 G1 N
referred to an instrument having an input impedance consisting of a resistance of }% P; @- n( ]' b1 \, z w9 n- |! z
100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
; H- t- M; B: B( ~7 N! CNOTE During an interval equal to one time constant, the voltage will have decayed to 37 % of its original value.
2 f& Q+ |7 ^+ `8 f0 h
2 u3 y3 D. T* R: S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%。
$ M7 u7 q3 @( J6 e7 V+ r这个怎么理解?? |
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