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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.
) U# s7 l7 U7 z对比过10A,30A,35A，感觉不到电阻变化很大。% W4 e$ s1 p7 l0 k9 z# z/ x1 R0 x
UL1082
! w9 J7 A" ?3 ]29 Resistance of Grounding Test/ S4 U( Z) D8 N C: n$ [; O
29.1 The resistance between the point of connection of the equipment-grounding means at or within the
$ N+ c1 k8 m3 [1 l2 m) Mappliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
3 | _1 D% Z4 | e& ]29.2 Compliance with the requirement in 29.1 is to be determined by:
, y- G5 ~4 _( b1 L' A8 |/ La) A resistance-measuring instrument; or
% g8 [. A8 l' c$ l7 \5 Hb) Passing an alternating current of at least 30 amperes from a power supply of not more than
! Z) |) Q$ I7 i9 T% `+ ~6 I _12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,
" H; D( [7 Q: V' I7 [, E6 c: n- M2 Vand then measuring the resulting drop in potential between the two points. The resistance in* u1 Q' ]: O7 [3 ?- i
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
4 |6 Y. v4 `6 W& E! zpassing between the two points. |
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发表于 2009-12-23 16:06
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