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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.0 r) B5 J, c+ x1 w
对比过10A,30A,35A，感觉不到电阻变化很大。% c: f( T0 S- k3 |/ }0 n1 F& b2 _
UL1082
' I0 d/ K2 a* p29 Resistance of Grounding Test9 {3 O# o8 E7 _+ n f
29.1 The resistance between the point of connection of the equipment-grounding means at or within the6 z- _5 A9 `+ k; @& s) u* Y
appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
: X* _- W" e4 N% W. |29.2 Compliance with the requirement in 29.1 is to be determined by:; N& w$ P8 i+ l5 _
a) A resistance-measuring instrument; or. ~8 K( z6 h# q8 e4 n
b) Passing an alternating current of at least 30 amperes from a power supply of not more than
. R7 e4 [3 ?$ }+ F! [, f12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,4 ^5 j0 w8 G9 B! E9 Z
and then measuring the resulting drop in potential between the two points. The resistance in
0 e7 G+ B% Q/ s2 e+ S. Vohms is to be determined by dividing the drop in potential in volts by the current in amperes
* k0 x8 I: T2 X( W# O; _% z0 m, k2 Tpassing between the two points. |
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发表于 2009-12-23 16:06
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