if single phase is having 220v supply then why three phase is having 440v instead of 660v?
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Answer Posted / sanjeev
voltage means potential difference between two points. In case of single phase potential difference between phase and neutral is 220v.
in case of three phase(R,Y,B) potential difference between R & Y is 220 and Y& B is 220
Hence the voltage offered by a three phase(LT) system is potential difference between Three phases i.e. 220+220=440 volts.
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