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60950二版标准中的:
. `8 l# ` J. @0 s' I5 f" A2.1.1.7 Discharge of capacitors in equipment
8 ^. c$ U8 p: S3 ] s2 ~# F2 WEquipment shall be so designed that, at an OPERATOR-accessible external point of disconnection
, i0 }5 e' C1 Q+ Cof a MAINS SUPPLY, the risk of electric shock from stored charge on capacitors connected in the$ s" J+ m6 Q. H, i. C) T% z+ u
equipment is reduced. No test for shock hazard is required unless the nominal voltage of the; W# A* \) l) l2 a, p- K# n5 }* B$ B" a
MAINS SUPPLY exceeds 42,4 V peak or 60 V d.c.) `. C5 |4 d+ C- N: q: x
8 E4 S R* U, ~. N; e- d 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
) U8 e- J' O$ Q* _, x3 \6 E$ F$ j6 |+ [8 W; l" X
Equipment is considered to comply if any capacitor having a marked or nominal capacitance
! @0 i6 S2 y6 Q/ {% Wexceeding 0,1 μF and in circuits connected to the MAINS SUPPLY has a means of discharge
]3 T( y- N1 z9 n: qresulting in a time constant not exceeding:
$ a- `1 K# v5 [: t" Z6 c/ l, F6 b– 1 s for PLUGGABLE EQUIPMENT TYPE A; and
3 L; w9 Z, y! N* P( K& [– 10 s for PLUGGABLE EQUIPMENT TYPE B0 O+ ]! l4 z' A0 ]8 P- ?
$ H. J. `( }' R/ e8 W6 c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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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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