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本帖最后由 hgf397556998 于 2014-4-24 10:49 编辑
" I( R0 E' x6 m% ]losiondy 发表于 2014-4-3 17:53 $ B; Q7 O# s) D5 ]* j
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.
; l8 W% w: R3 o- O/ e' \标准CSA C22.2 No 0.4中,2 j' E5 S6 L$ T
4.1.2 Procedure" c! K' P7 c W3 f' e |# w
4.1.2.1$ Y2 P) d- f& f
The impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the! Z; t% Q/ @1 w3 q; n
bonding terminal means and measuring the potential drop between them at the end of the period. The3 T7 G& o2 m* ^" l+ [% C& |! I) r& l
current shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4.
) z4 u- ~, R" y- X$ CTable 41 {7 K: M( _& _" P* ^4 ~
Duration of impedance test current" s1 C. }) D/ y: W1 T
(See Clause 4.1.2.1.)
: k- K* c. b# G& `Fusing of branch circuit required for equipment, A Time, min* i: c) \, `6 D
0-30 2
) |" d9 u' ?) ]0 O( F31-60 41 a* H; M5 p! x, [% f. V O
61-100 6, W5 z. o2 W8 a7 r0 V6 M S4 W
101-200 8& a" q% A- M$ E- k
201 and over 10! H( u' Y; f( j* o+ @# V7 ~
这里所提到的阻抗是指接地电阻么? |
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