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60950二版标准中的:% i& E9 x' f: ]2 h
2.1.1.7 Discharge of capacitors in equipment
$ C/ _; ]3 @" |# xEquipment shall be so designed that, at an OPERATOR-accessible external point of disconnection( s+ O) f3 f& P3 Q5 Q
of a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the
) B0 L/ G! V5 F$ J* f* m0 oequipment is reduced. No test for shock hazard is required unless the nominal voltage of the, p% Z p* i3 a7 R$ u O- t5 K" C+ I# ^
MAINS SUPPLY exceeds 42,4 V peak or 60 V d.c.# E n7 K( C G* d6 g$ Z( G
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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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Equipment is considered to comply if any capacitor having a marked or nominal capacitance( M4 c7 d3 E, s) H' C# K' H. s
exceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge. f0 _7 E* G7 L
resulting in a time constant not exceeding:. d) k' q8 a" v
– 1 s for PLUGGABLE EQUIPMENT TYPE A; and$ I- U+ [0 M- L$ U# |: \
– 10 s for PLUGGABLE EQUIPMENT TYPE B
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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, r* a; r! |; q3 e5 @0 }
# f$ |" f" k/ y: d; ^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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