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60950二版标准中的:8 w( G7 x2 V5 d4 b7 O* l
2.1.1.7 Discharge of capacitors in equipment: i6 V" t# v9 G% v/ \' z3 q" V
Equipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
2 k1 ~! d: @/ Z$ Zof a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the
- D0 |, Y8 K% A2 x6 f" qequipment is reduced. No test for shock hazard is required unless the nominal voltage of the
C, B! D, a3 _2 i/ \- ?MAINS SUPPLY exceeds 42,4 V peak or 60 V d.c." m' [) N; e# o$ l/ q1 @7 V, R
1 m0 I3 G! s# j% s
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% l, Q: H; |( B. Z
1 B7 [6 @/ R$ c% w2 C' v
Equipment is considered to comply if any capacitor having a marked or nominal capacitance
. Z& O: Y4 r% e, {( Rexceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge$ l' g" J# z. R' v
resulting in a time constant not exceeding:- ~) o- f9 J% o- \; S& b9 v ?
– 1 s for PLUGGABLE EQUIPMENT TYPE A; and; b& D* a$ s( h* a
– 10 s for PLUGGABLE EQUIPMENT TYPE B5 }0 c9 x4 |% C) h+ @5 ]
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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,
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! U7 z% {+ p* C3 ?, _# {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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