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 V-X-M-H 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
i would like to know what V-X-M-H ic will do here.
Is there any recommended circuit to read 3 phase 3 wire voltage. how i can use ground reference.