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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 9 E! O7 @! A. m( X2 Q& [" z! q4 M
losiondy 发表于 2014-4-3 17:53 + [4 @5 ?) e' D7 C {: {5 Q
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. 0 K7 S) Z# ]/ p* k( O/ c
标准CSA C22.2 No 0.4中,
2 ~, X. e3 V* s T. B7 g4.1.2 Procedure! a5 v1 A& m6 z/ F6 @8 }- ~
4.1.2.1; \2 N, u; k& ]% r! ^, A {
The impedance test shall be conducted by passing a 60 Hz current from a part to be bonded to the
! d0 U; U6 l# f7 s0 Pbonding terminal means and measuring the potential drop between them at the end of the period. The
# k4 L# m. h6 B" ^, c3 ?current shall be as specified in Clause 4.1.2.2 and of the applicable duration specified in Table 4.
! L* X1 q" O( m% x( a5 \; nTable 4% S- [, @& E' B
Duration of impedance test current
: W7 B6 Y4 @4 k" T% c8 f( H1 y$ {(See Clause 4.1.2.1.)
$ f: _9 h3 a( F/ d I; e( ]8 xFusing of branch circuit required for equipment, A Time, min( t6 Q& z) R! B& D9 v) s5 R& P
0-30 2
: S4 E, f" |0 d. p8 D( R* R5 D31-60 4
2 _2 i) J. ~8 T$ r; r# F, s1 d; ]61-100 6$ a c# \' n- O! i( s: S ?# O0 o
101-200 8
1 {( \( O( R2 G3 t" z201 and over 10
. M1 e5 b/ ?8 X. k) u8 P: j. s& f这里所提到的阻抗是指接地电阻么? |
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