點解三相電器唔使用中線,單相就要用呢?
回答 (2)
2008-01-21 4:47 am
✔ 最佳答案
三相電器唔使用中線係因爲三相電已經有佐囘路，原因係每一相都有120°度既相差，造成相對相回路，單相只有一條綫，如果無中線就無回路，無回路D電咪唔會產生能量咯。 
2008-01-19 6:49 pm
You made a mistake.
There is a neutral line in a 3 phases power supply.
When you take a look of the 3 phase plug, you will find 5 connections there, they are 3 lives (3 phases), 1 common neutral and 1 common earth.
Our daily use power supply is 1 phase, with 1 live, 1 neutral and 1 earth in the plug.
the neutral is the return line to power station, ANY SUPPLY MUST HAVE IT.
There is a neutral line in a 3 phases power supply.
When you take a look of the 3 phase plug, you will find 5 connections there, they are 3 lives (3 phases), 1 common neutral and 1 common earth.
Our daily use power supply is 1 phase, with 1 live, 1 neutral and 1 earth in the plug.
the neutral is the return line to power station, ANY SUPPLY MUST HAVE IT.
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