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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:
; j- _" L3 J3 z5 ?0 MThe relevant time constant is the product of the effective capacitance in microfarads and the/ D3 J v8 r3 Y
effective discharge resistance in megohms. If it is difficult to determine the effective
- o2 D( w/ `; o6 O. M7 w9 D. K% [capacitance and resistance values, a measurement of voltage decay at the point of external
/ x7 ~& C g% B- O( b# ldisconnection can be used. When conducting the voltage decay measurement, the result is
: ?8 G7 {7 ^( O% z4 H. ~3 u$ Oreferred to an instrument having an input impedance consisting of a resistance of
, U% W# w, j; q! r, n7 c3 w! h( S100 M Ω ± 5 M Ω in parallel with an input capacitance of 20 pF ± 5 pF.7 I5 Z: K* W0 \
不知道這算不算有要求 |
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