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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???4 B1 G, E) k/ a- D/ b2 ]
标准中:
' ]1 B, C! x, n& c- \; s+ m. z9 sThe relevant time constant is the product of the effective capacitance in microfarads and the& m4 C$ Y% O* p; q3 y9 p
effective discharge resistance in megohms. If it is difficult to determine the effective
$ C; H7 A) U' L( ~: s0 ~capacitance and resistance values, a measurement of voltage decay at the point of external3 g0 E2 v7 o' n' Z9 X2 T$ `) L
disconnection can be used. When conducting the voltage decay measurement, the result is+ p' L! u% T! t, _& K; h
referred to an instrument having an input impedance consisting of a resistance of
( x5 H6 s/ \6 k! j100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.* H$ m( P( j, l
NOTE During an interval equal to one time constant, the voltage will have decayed to 37 % of its original value.
; t( d P* j" R6 u3 n5 x# H+ @
% o9 Q, E0 @6 c4 l5 f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%。% h) s3 N! ]( J: M% H0 p2 B* Q/ H
这个怎么理解?? |
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