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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。
; [& P! i' e: S" ^/ T; c* d& 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。! B" c, ^" y/ a0 T/ o+ W% Y5 J6 ~
5 L" ]" @1 q$ s1 W/ ?& {6 a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 shall: y! {6 ~) O: t7 w' a: W: Q. u5 J$ K
not exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and" }$ D& v0 ^4 J1 M$ [
– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance
3 m% ?( D/ W; c+ {' dshall not exceed 0,1 μF,. A" T$ I9 M" y9 z
– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall
, e4 V' \( H: H6 f$ O t1 Wnot exceed 45 μC,! P! X' o! K! [* f) c
– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed% l# M% {, l+ [* ?
350 mJ.
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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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