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Three-Phase Systems in Power Applications - Engineering

Q1:

A three-phase generator is connected to three 90  load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?

A 0 A

B 1.33 A

C 3.99 A

D 2.66 A

ANS:A - 0 A

When the load is balanced in 3 phase system the neutral current is zero.