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电气间隙应该是没高要求的,因为其确定只和器具额定电压有关系。
1 d' _7 F, m( d" Y/ h1 G2 F爬电举例和工作电压有关,但也不是很大,基本材料不太差,12.5mm就可以了。
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另外8.1.4中,可触及带电部件如果通过保护阻抗与带电部件隔离,If protective impedance is used, the current between the part and the supply source shall9 e! o. a2 N; ~" V9 c! ?4 Q
not exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and
8 n; }& H( i* v: N# t& r– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance* |8 g. _4 q9 j9 e5 T( l
shall not exceed 0,1 μF,
3 \ S q7 I: H( R3 g6 s– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall* A# G" y0 \6 }" b9 n7 B
not exceed 45 μC,
$ x- ~/ k9 \' H4 {6 }, e– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed
, {' G2 v! b/ E& P$ l" X o. C; ~& v350 mJ., g$ Q' e, J+ A$ d, ^
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也可以不视为带电部件,换句话说,手可以直接触摸,一般通过放电量测试。
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没做过类似产品,只提供自己看法。 |
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