A 3-phase 4 wire system is commonly
used on
primary transmission
secondary transmission
primary distribution
secondary distribution
secondary distribution
3-phase 4-wire system is commonly used
on secondary distribution. The level of voltage in secondary distribution
system is 400/230 V AC system. Voltage between any two phase is 400V. And
voltage between one phase to neutral is 230V.
Hence, the correct option is (D).
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