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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???+ c5 I% \& ]8 e/ n
标准中:
; R V) c- k4 q6 M1 ]- QThe relevant time constant is the product of the effective capacitance in microfarads and the, g, Q: C( j$ r; w$ F9 G0 m
effective discharge resistance in megohms. If it is difficult to determine the effective! ~! G; S& W9 F! x; U. H
capacitance and resistance values, a measurement of voltage decay at the point of external
- Y. P4 F+ ^# Y- r$ Edisconnection can be used. When conducting the voltage decay measurement, the result is
' d' t% @- r: \" d3 ereferred to an instrument having an input impedance consisting of a resistance of
; E/ ]7 Q- B% b# q100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.$ ?6 R1 ^# H. I2 c
NOTE During an interval equal to one time constant, the voltage will have decayed to 37 % of its original value.& q9 V* N1 U* u0 ]) i% X/ Q
8 f9 D" C) Y& Q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%。% k: Y" ~) K3 e u
这个怎么理解?? |
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