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60950二版标准中的:
- m) G; z4 g. b$ Q2.1.1.7 Discharge of capacitors in equipment" h8 Z9 k6 e. `1 v: |9 v; g+ M2 g
Equipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
0 v, V7 z( x1 G- o( M% H) Q' zof a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the
4 ]/ K! b! |$ y* _ m4 s6 ]equipment is reduced. No test for shock hazard is required unless the nominal voltage of the
9 l3 m8 n# u9 D3 A4 |6 D: BMAINS SUPPLY exceeds 42,4 V peak or 60 V d.c., l. J: ~, r/ ?
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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( X3 W) C+ F* w
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Equipment is considered to comply if any capacitor having a marked or nominal capacitance
* C7 D( g7 g/ r" O" j, {exceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge
f/ _2 }# T7 R6 s2 B4 presulting in a time constant not exceeding:
- k; [) Y4 g7 Q) W- a8 Q– 1 s for PLUGGABLE EQUIPMENT TYPE A; and
, ~ F* q, y' p( X. p! Y# c9 H: A– 10 s for PLUGGABLE EQUIPMENT TYPE B* ~! R( v0 I; q' e, V8 U
7 B! m4 i! _! P3 K# x( y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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' K1 C8 k3 {8 o% S# 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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