3 phase 3 wire and 3 phase 4 wire circuit

Ajit's picture

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Joined: Mar 08, 2019

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3 phase 3 wire and 3 phase 4 wire circuit
March 8, 2019 - 12:55pm

Dear all,

I am trying to build 3 phase voltmeter that could measure L-L and L-N voltage during 3 phase 3 wire and 3 phase 4 wire connection. 3 phase 3 wire and 3 phase 4 wire connection are external connection. 

as we know in 3 phase 4 wire we will get neutral reference so we can get accurate reading for L-L and L-N.
but in case of 3 phase 3 wire we dont have neutral reference .In this case it will be difficult to get gnd reference. I would like use both connection type in common circuit,

I have seen one of the product where they using VXMH IC , can some one suggest me functionality of this iC. i have attached schematic for reference.

If any other suggestion with schematic will be appreciated. to differentiate 3 phase 3 wire and 3 phase 4 wire

 

russell1258's picture

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Joined: Mar 10, 2019

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March 11, 2019 - 7:59pm

Your article is very helpful for begenners......thanks for your good writting..!!