Question

Harmonic restraint in differential protection for
transformers is provided to prevent mal-operation
caused due to:
(1) Magnetizing in-rush current
(2) Unmatched CT current imbalance
(3) Demagnetizing flux
(4) Voltage imbalance during faults as detected by
V Ts connected

Answer 1

(4) . VOLTAGE IMBALANCE DURING...... Is the correct one, If wrong then inform me