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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。
) z2 Y Y' q: a t# J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。( X6 p" M0 j2 m- V
) [3 U7 O* X+ J1 B( u& g. \. K, z$ V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/ C" }( U, g6 B( dnot exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and
& q5 H$ a4 R: D* J3 t3 q– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance- n0 j/ @" @8 D
shall not exceed 0,1 μF,, h2 j* a# v, `% b$ A* t3 H
– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall
7 x! N3 Q9 b L9 l+ x& enot exceed 45 μC,/ [9 Q) Q" F& O N U
– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed
1 v: s4 O$ k- y/ W$ Q350 mJ.
8 K0 C# s) b; ?) a" O$ R0 ?( o) X; P. h1 y
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。7 U. y& u4 P* p: c; C% H2 Q
7 K m6 F9 _( b没做过类似产品,只提供自己看法。 |
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