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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 O4 u/ y$ d9 _对比过10A,30A,35A，感觉不到电阻变化很大。+ B* N$ k/ D; v; ?
UL1082, t1 I" z% F% P9 E+ D
29 Resistance of Grounding Test
8 W* ]) C3 T2 m+ T# r29.1 The resistance between the point of connection of the equipment-grounding means at or within the* T8 d/ n; d. @; S) p+ T( ?
appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.' h* M, M" w$ @! [! R
29.2 Compliance with the requirement in 29.1 is to be determined by:
E/ r2 s& _# K# qa) A resistance-measuring instrument; or
9 p& G$ L5 v$ l6 v1 X. U3 qb) Passing an alternating current of at least 30 amperes from a power supply of not more than
4 O8 @ c: I, D% M12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,. X7 T6 v3 v3 ?' T
and then measuring the resulting drop in potential between the two points. The resistance in0 s( Z; M2 a. a$ W/ x
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
) r" [* E3 Q9 s4 ]9 ?. d+ tpassing between the two points. |
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发表于 2009-12-23 16:06
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