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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
3 H) _+ K# P6 {! }2 \- alosiondy 发表于 2014-4-3 17:53 1 D C+ o' W! b+ t" b- ]+ t3 c# r
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. : E w3 o6 h. \+ G
标准CSA C22.2 No 0.4中,2 h! s6 M8 V3 r6 o/ r. h
4.1.2 Procedure2 ~( }# p$ } x' e5 k- z
4.1.2.1
2 O* g2 J5 G# X9 mThe impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the
: Z' X7 }6 N6 ]bonding terminal means and measuring the potential drop between them at the end of the period. The" i9 W' d/ z! O
current shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4.
" e5 o' c/ M/ a H0 A% Z- m# lTable 46 w! I0 s3 a _, g: H9 ]
Duration of impedance test current6 ~8 a. h+ x# j
(See Clause 4.1.2.1.)" p1 e! X W. a
Fusing of branch circuit required for equipment, A Time, min$ p- b3 ~* O, a% `; M7 u
0-30 2& |: w6 M7 f4 g2 h. V" K# M" V; ^
31-60 4
0 m6 F; [* l" S1 m61-100 6
( p, _3 F# l4 c. j* g101-200 8" T1 S/ q/ P: R+ |' ^
201 and over 10% O+ n* ~5 }( a# X6 Q3 o2 \6 f a
这里所提到的阻抗是指接地电阻么? |
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