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发表于 2011-5-5 15:40
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引用第3楼学学安规于2011-05-05 15:26发表的 :0 |! P! y, ?5 y3 y# u
我公司的接地电阻测试仪是直接显示接地电阻的6 d m0 T# }+ a( o
比如,用25A去测试,仪器显示16m欧,那接地导体上的压降就是400mV5 j C( }, W7 [+ \( y# M9 i
; t, X# _, Z T2 w"the current between the earthing point and the accessible metal parts is 100mV."
1 E7 w1 r6 t' ^& R- z* I) U9 o这句话我非常不理解,怎么电流跨了几个单词后就变成电压了? k* L( M& n! A, g% S! W# s
....... 对不起,它的原文是这样的, the current be passed between the earthing terminal and accessible metal parts intend to be earthed for 60s.
- U0 l1 ]0 Q U; h voltage drop between the earthing point and the accessible parts is 100mV." H; w( O/ H! a4 f V. {6 H# j
the resistance caculated from......... |
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