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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。0 |7 N1 w, c, [+ L" o2 u
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。
! @' R5 Y; }0 B8 s7 k# L) q( Z# C
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
7 \* \. C& ]6 U1 b# w+ P) Q! ]not exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and" o' z& x8 l# m4 {! Z8 ?4 E E
– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance
& e+ x3 K4 i7 a$ V; Y2 m/ }shall not exceed 0,1 μF,
. \ T- z3 |- V& A– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall1 a) V) f0 N' B
not exceed 45 μC,; F0 Y y7 B3 q8 ]
– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed
3 K* t, w9 P: R( z/ P: s8 I' D9 h350 mJ.
@0 q) i4 b$ |. o0 J0 ]
7 N* K! M! y% \1 q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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