中線有咩用途 ??
如果佢觸及地線會點?
關於中線的問題
2007-01-29 7:17 am
回答 (2)
2007-02-01 12:12 am
✔ 最佳答案
中線和火線是一對的, 是任何單相交流電設備向電源取電時必需要的兩條電線的名稱.火線是帶電的, 它的電位(電壓)是 220V, (千祈不要掂, 會電死!!!!)
中線是不帶電的, 因它的電位是 0V 和我們的電位一樣.
中線作用是: 因火線與中線之間的電位差是 220V, 火線的 220V 電壓力, 將電流(電子)送到用電器具, 使之產生功效後, 電流由中線回送至電源. 俗稱中線為回路.
中線和地線的電位都是 0V, 因中線和地線其實是來自三相供電系統中的同一點, 即它們本身是相通的. 所以它們互相觸到是沒有問題的.
地線的功用是作為漏電時的旁路導體.
2007-01-29 9:49 am
neutral line is zero potential diference(0 V)
It combines with the live wire, which has a potential difference of +220V or -220V, to form a complete a.c. circuit.
Earth wire is zero potential diference(0 V)
When neutral wire touches Earth wire,
nothing will happen as the potential difference between them is 0V
It combines with the live wire, which has a potential difference of +220V or -220V, to form a complete a.c. circuit.
Earth wire is zero potential diference(0 V)
When neutral wire touches Earth wire,
nothing will happen as the potential difference between them is 0V
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