Question

single phase is volt 220 then why 3 phase is 440 not 660​

Answer 1

The voltage between phase and neutral is called phase voltaltage.The voltage betwee two line is called line voltage .3 phase system is expressed with line voltages. The line votage is 440 volt. Also the voltage between any one phase and neutral for a 3 phase system is 240 volts.

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