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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 ! f' K7 B9 `7 s+ ?& L. w+ s
losiondy 发表于 2014-4-3 17:53  0 y/ I) G+ h6 z& f8 @; k" @( B7 @
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.
H1 A5 q# A- x% b/ G; U标准CSA C22.2 No 0.4中，
& v) c. K3 a( O, ^6 d4.1.2 Procedure
- w* t8 T0 _1 }3 I. s! c4.1.2.1
$ R& _) J1 h( D% s& I2 \The impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the
2 b e7 y. P- ^ L2 t# p$ Zbonding terminal means and measuring the potential drop between them at the end of the period. The
. Z$ S! a8 B( K" n; J' X- D# D5 Xcurrent shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4." q, }; d. a9 y: x7 c0 y/ Y) i
Table 4
- C1 z! W4 g% ]3 S0 s0 K$ S9 _Duration of impedance test current
: s1 p4 Q% _( ^! f1 P& y6 O: Y" `) u(See Clause 4.1.2.1.)+ q+ f, ~1 U9 p) X/ ]7 Z
Fusing of branch circuit required for equipment, A Time, min3 o, Q& v' b5 B- r7 E
0-30 2
' T+ W9 S9 W1 q31-60 4' {4 ^# B" y- p/ r) G% s9 u
61-100 6
! ^/ U) ~* K8 b, G+ Q! G7 C' h101-200 8$ |3 |. `7 D* C$ M8 |( L/ X% e# U
201 and over 10, ~& z) q, ~% N: `5 @/ D. n
这里所提到的阻抗是指接地电阻么？ |
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发表于 2014-4-3 11:19
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