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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。& N% a7 F- b% @2 `8 j2 ~
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。5 n& l; F' f8 U/ ^8 w' _. m
, E% x) ~0 m' `. k* N5 B9 d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' d% p7 A! l* ~6 b3 Z$ G3 |) q) a
not exceed 2 mA for d.c., its peak value shall not exceed 0,7 mA for a.c. and
: I. H2 C& w8 _% H/ }9 v– for voltages having a peak value over 42,4 V up to and including 450 V, the capacitance; i6 V" w5 L: g1 p
shall not exceed 0,1 μF,
( `* N: }6 U2 l% N3 ?$ _– for voltages having a peak value over 450 V up to and including 15 kV, the discharge shall) I: T/ `! L; V5 _2 g
not exceed 45 μC,; d. s& c: T% T9 W. {. R
– for voltages having a peak value over 15 kV, the energy in the discharge shall not exceed2 @. N3 h; Q4 P, o
350 mJ.
7 E0 p$ p* d! L' g
3 ?4 O! Y% s' G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。1 U! x9 H6 e' p" j# ^
@/ _; _! H! z' V$ E( z3 S没做过类似产品,只提供自己看法。 |
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