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发表于 2014-4-24 10:25
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本帖最后由 hgf397556998 于 2014-4-24 10:49 编辑
8 G5 u" Y; D; s- V# w+ _' b: D1 O; jlosiondy 发表于 2014-4-3 17:53 / p5 y, F, ^4 G% Y! M
40A是加拿大标准提到的:该章测试需要参考另外一个标准CSA C22.2 No 0.4.
$ `2 ]1 f, Q6 I: f标准CSA C22.2 No 0.4中,
5 K9 ]# i' l5 L: @/ K4.1.2 Procedure: g" o6 f& H8 S' m
4.1.2.1
4 `2 q0 D9 `5 S. y( E |The impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the% C* i) \- r t4 O% _* o; M8 O
bonding terminal means and measuring the potential drop between them at the end of the period. The' J: \0 w) M, g0 K1 K. t
current shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4.
! X" r, {9 F* O9 b7 z" pTable 4# g% V: P' H$ c- f( a
Duration of impedance test current
. w/ L9 o) c. R4 d; r& L(See Clause 4.1.2.1.)
5 _2 c: {7 F* A* dFusing of branch circuit required for equipment, A Time, min
3 B7 h2 `2 j* V6 @; ~( P$ e0-30 2" y7 c+ e% T# C! `
31-60 4( z+ j2 W5 n- b% }, s
61-100 6
% e; k. k5 L4 {9 p- v101-200 8
& A, m+ _9 M0 c& c! {201 and over 10# l5 c0 ^$ i5 C1 m/ x o; z
这里所提到的阻抗是指接地电阻么? |
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