) p/ q* r% |: [! l) I/ Y- s" `If protective impedance is used, the current between the part and the supply source shall 4 Q3 B' I- c* j9 a9 \% H7 Bnot exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and 9 \1 g1 q. Q! `0 Q8 ~2 |% g– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance4 Y9 K3 Z, k, K1 y, W9 l- s
shall not exceed 0,1 μF; : k. J1 [& o& I* @' j! A$ x5 H6 T- v7 }– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall 7 H- k9 O- t6 y' J( Xnot exceed 45 μC; ; N$ q6 Y: O5 f1 t( r% ?8 \– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed( K0 A: O7 L u1 U
350 mJ.5 W- n' Y, R; d0 g- l: E+ I% k1 I& m! p
Compliance is checked by measurement, the appliance being supplied at rated voltage./ U: w+ [- ^4 y! m
Voltages and currents are measured between the relevant parts and each pole of the supply0 R* w9 y8 m4 l4 Z
source. Discharges are measured immediately after the interruption of the supply. The $ Y; H# ~1 P2 ?8 ]quantity of electricity and energy in the discharge is measured using a resistor having a) U* w- M* K6 H9 k, v" T5 @- Q8 C
nominal non-inductive resistance of 2 000 Ω . & }2 r1 D) W* f, Q! P6 R0 y" |7 W2 z" k# D% ?; D 作者: ID长就牛b 时间: 2016-8-15 17:03
有的示波器好像是带这个功能的，作者: vcgtrf 时间: 2016-8-16 13:36 本帖最后由 vcgtrf 于 2016-8-16 13:39 编辑 ( @, V7 P: w8 e& A; j
9 c Z0 n- f1 c: o; h
: ,看来坛子里IT 人不多
:):):):)