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看了一下IEC 60950-1 2nd的clause 2.1.1.7裡面有一段敘述:
9 A; Q$ m. ~2 i! [) d C2 W vThe relevant time constant is the product of the effective capacitance in microfarads and the2 f t6 o# `& s* G: X
effective discharge resistance in megohms. If it is difficult to determine the effective0 E- r* C6 p2 t
capacitance and resistance values, a measurement of voltage decay at the point of external
( t, r) i# J1 Wdisconnection can be used. When conducting the voltage decay measurement, the result is
7 f4 f7 u1 J9 h& E; Y3 {: ]/ v- Qreferred to an instrument having an input impedance consisting of a resistance of
1 S% j& E8 i/ I* H. O100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.
$ Z: X. }2 g! p- g8 e- k不知道這算不算有要求 |
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