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60950二版标准中的:2 s$ t' f3 K7 q" H
2.1.1.7 Discharge of capacitors in equipment6 l/ u! U7 A1 Q* I" i
Equipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
% Y {& |* {/ Q* l' H; wof a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the0 w0 k( k* O% p/ w. d
equipment is reduced. No test for shock hazard is required unless the nominal voltage of the n- |3 C' R4 {! Z
MAINS SUPPLY exceeds 42,4 V peak or 60 V d.c.
7 b) R8 U; Q$ q6 o5 W" g. o' J3 S* ^$ u$ k% k# `3 M
中说到连接到Mains supply的电压没有超过42,4 V peak or 60 V d.c值就可以不必测试。但是接下来说9 J2 \9 {8 g9 }/ d& w) G
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Equipment is considered to comply if any capacitor having a marked or nominal capacitance# v. H; j. ~& w. a9 E2 q/ j8 f
exceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge
% P z5 k2 a) s" Nresulting in a time constant not exceeding:
7 h; G/ R% ?) t+ n: K* R/ z- o– 1 s for PLUGGABLE EQUIPMENT TYPE A; and( Y4 [: _) A# O1 q J% C
– 10 s for PLUGGABLE EQUIPMENT TYPE B! J4 i: `: t6 e% ^
, @0 g7 I0 `, N! H6 z# J在连接到Mains supply的电路中有容量超过0,1 μF的电容则要求考虑1s或者10s之后储存在电容电压电压值没有超过规定的值没有超过42,4 V peak or 60 V d.c值或者衰竭到最大的37%一下,
9 d/ r8 U. b* P% Z" O
0 _8 X2 }9 W! f/ P) [2 w在这里假如产品连接到Mains supply的电压没有超过42,4 V peak or 60 V d.c.,但是电路中有超过容量0,1 μF的电容,那究竟是不要测试呢?? |
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