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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
" R. e/ L4 s6 S! Jlosiondy 发表于 2014-4-3 17:53 4 u0 r5 @. s$ w& R. |' K
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. 1 |5 c6 M. ]1 |6 k) w
标准CSA C22.2 No 0.4中,
4 @' t5 C Z, G- \$ ]4.1.2 Procedure
- Z8 ?$ s9 }4 W& o& s4.1.2.1/ U- M' z; ?, l( U) ~" u0 O
The impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the: |& ~3 |' p# N! m& Y. m- j4 O/ \, \
bonding terminal means and measuring the potential drop between them at the end of the period. The
) T" k( }. a% {4 T7 jcurrent shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4.
( N# l# {7 [2 q x" C1 sTable 4# o2 Y) Z+ U3 `" T7 D ?
Duration of impedance test current# d1 J O, @2 G+ d' J4 s& C
(See Clause 4.1.2.1.)& S1 g- O$ ]. C0 ]
Fusing of branch circuit required for equipment, A Time, min' m0 z6 U2 {5 h% Y) f1 @
0-30 2
2 r% G7 Q& d1 ^9 X8 V' c& M" J1 x31-60 4
* g4 u4 P+ V/ P4 n( T# a61-100 6
6 l2 Z$ G `; a+ ^1 \3 B) L" N; l101-200 8
- @; r) ~+ ]8 d8 ^7 N' I5 W201 and over 105 I7 x* T* B4 {9 i
这里所提到的阻抗是指接地电阻么? |
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