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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.
: M! z( ]" ]- a( M: Y) e9 `4 F- \) o8 r对比过10A,30A,35A，感觉不到电阻变化很大。
0 f3 O( H# W( A2 k! W0 LUL1082
9 C, V, G% |5 H& K ~' n# D* q# d+ E) @29 Resistance of Grounding Test5 M' l0 Q0 |$ _
29.1 The resistance between the point of connection of the equipment-grounding means at or within the
/ y+ Q. l& J$ w+ o/ Happliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
6 H9 p1 S7 \- F2 C( g$ C Q- V29.2 Compliance with the requirement in 29.1 is to be determined by:+ G( H/ D+ ]6 B" a3 m
a) A resistance-measuring instrument; or% [% M& S) u; a
b) Passing an alternating current of at least 30 amperes from a power supply of not more than
" ~, o) J! T" t# L$ w12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,6 f% T. ~" ?5 U
and then measuring the resulting drop in potential between the two points. The resistance in2 [) f$ @( R b
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
) P# K/ R6 s+ j0 s, rpassing between the two points. |
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发表于 2009-12-23 16:06
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