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60950二版标准中的:& I+ O& X( |' E* V9 _
2.1.1.7 Discharge of capacitors in equipment; H* ]4 Y' h1 D ]# R* R
Equipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
* ~; h# u. ^5 |" c# U* Oof a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the2 w7 E& ~1 E) B3 R9 A
equipment is reduced. No test for shock hazard is required unless the nominal voltage of the
0 f/ }2 F( S# R. zMAINS SUPPLY exceeds 42,4 V peak or 60 V d.c.
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* s7 T# ~: \# @- d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
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( m4 `* i, x, |Equipment is considered to comply if any capacitor having a marked or nominal capacitance- }1 x5 H* C. g8 q4 p% h( a
exceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge' x5 d5 D$ H- V0 y
resulting in a time constant not exceeding:* J# l K4 B" N: `
– 1 s for PLUGGABLE EQUIPMENT TYPE A; and8 z% `8 t. z0 a( J
– 10 s for PLUGGABLE EQUIPMENT TYPE B& ]: I, o" ^$ p y" K3 W# X
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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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7 @8 i# Q" [2 R, _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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