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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.6 ]3 a* h. N$ v0 F j7 P9 v% N
对比过10A,30A,35A，感觉不到电阻变化很大。
* F7 N6 S/ _( ~! UUL1082
2 r" ^/ p% p; Z a" z2 a w- R29 Resistance of Grounding Test6 S8 u8 }3 @2 F$ a' P9 V
29.1 The resistance between the point of connection of the equipment-grounding means at or within the
+ [4 j) R0 n" u: `0 P- K1 {6 k! _appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
9 D* W: `. E( i" i29.2 Compliance with the requirement in 29.1 is to be determined by:0 w& g, p9 n0 [2 a/ i
a) A resistance-measuring instrument; or
, ]6 Y* X9 }1 J. A0 P( o* `7 P. Gb) Passing an alternating current of at least 30 amperes from a power supply of not more than
( a/ i+ O S0 h$ g12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,( D& _$ g: `3 b2 |$ N9 J- Q
and then measuring the resulting drop in potential between the two points. The resistance in, \9 A$ q8 |6 |/ h
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
6 J/ J8 b' M4 ]% h6 Y* bpassing between the two points. |
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发表于 2009-12-23 16:06
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