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接地阻抗测试Resistance of Grounding Test电流已经更改从25A到30A，是第六版次，其它都没变，电压设置为12V，电阻不能超过0.1ohm.8 x) H1 w; z$ G0 G2 p
对比过10A,30A,35A，感觉不到电阻变化很大。
; S9 q6 J6 o o" p5 f) vUL1082- u3 b: |9 p1 F* k# T" J! h
29 Resistance of Grounding Test# _5 h }" K, o* u W
29.1 The resistance between the point of connection of the equipment-grounding means at or within the [7 P, U2 s. N( |
appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
, O: p( c9 M. d. f* j) }3 r29.2 Compliance with the requirement in 29.1 is to be determined by:
) o, C: Y6 G1 t+ v) K; _6 `+ B# _4 D7 Za) A resistance-measuring instrument; or4 N5 D/ \$ ?+ o l
b) Passing an alternating current of at least 30 amperes from a power supply of not more than9 S c: C4 v- {$ [+ {, s; ?, y
12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,
( F5 { A5 s% {# Band then measuring the resulting drop in potential between the two points. The resistance in
) U) K, I/ o! T1 s @% I# Oohms is to be determined by dividing the drop in potential in volts by the current in amperes) {9 v' K/ S; |# Y) u4 z
passing between the two points. |
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发表于 2009-12-23 16:06
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