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60950二版标准中的:2 O3 t/ @( E8 \. ?
2.1.1.7 Discharge of capacitors in equipment
9 A5 Z# I5 E( g4 b: Y6 L" JEquipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
' o. L4 Q& }9 T* ?3 ^of a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the# {3 c/ q" J% L; l% d$ {
equipment is reduced. No test for shock hazard is required unless the nominal voltage of the8 @& E8 R7 D+ J: x$ ^* I+ K d
MAINS SUPPLY exceeds 42,4 V peak or 60 V d.c., ?0 l$ [) }7 ]# S$ E
3 L2 N0 O. ?; i9 N$ J$ i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/ v: ^# t, v4 C7 c2 q. W
3 [9 U/ D$ m! R- UEquipment is considered to comply if any capacitor having a marked or nominal capacitance
' o& E; K' U8 Bexceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge
9 V. ?3 [2 U/ z' D8 ]1 m$ yresulting in a time constant not exceeding:
4 k$ _1 ?* h1 w, A$ r– 1 s for PLUGGABLE EQUIPMENT TYPE A; and: A6 g; I+ Z- {$ _% U& U R2 j
– 10 s for PLUGGABLE EQUIPMENT TYPE B4 ~% D; {! n$ B! Q) {
! T6 N$ V8 B" [! k. D) p
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,
/ O6 J9 B* x) R) A% d9 U. R$ Y* h; G$ P9 O; B: Y
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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