Lui asked in 科學及數學工程學 · 1 decade ago

why?三相unbalance時會出現n線有電?是volt or amp?

why?三相unbalance時會出現n線有電?是volt or amp?

一座大廈有幾條銅棍落地?

1 Answer

Rating
  • 9W2HL
    Lv 7
    1 decade ago
    Favorite Answer

    三相唔平衡時會出現中線可以有電流但係唔可以有電壓,如果中線有電壓就係接地系統有問題,可能接地駁口鬆佐,可能接地同帶斷佐,可能落地銅棍失蹤,如果電流太大,我建議用TN-S系統接地方法就可以解決,一座大廈有幾條銅棍落地係要計過既,無計過就會浪費。

    圖片參考:http://www.tlc-direct.co.uk/Figures/5.5b.gif

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