Mark the following statements as True or False, If false explain why. 1) Zero se

Question

Mark the following statements as True or False, If false explain why.

1) Zero sequence components of line voltages resulting from unbalanced phase voltages are always zero.

2) Zero sequence components of unbalanced phase currents in a delta connected load are always zero.

3) Zero sequence components of unbalanced line currents feeding a delta connected load are always zero.

4) Zero sequence components of unbalanced line currents feeding a Wye connected load are always zero.

5) For three unbalanced phase voltages VA, VB, and VC, in a grounded Wye connected load, VAB = VA -VB

6) For three unbalanced phase voltages VA, VB, and VC, in a grounded Wye connected load, VAB = (sqrt(3))VA *1/_30.

Explanation / Answer

1) False, since there can be possiblity that they sum and produce the net output as zero

2) False, it is not necessary zero

3) True, This will always be true for line currents feeding a delta connection.

4)Consider next a balanced three-phase load with its neutral connected to ground through an ... Thus the sum of line currents must always be zero

5)True

6)True

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