A current transformer has a ratio of 600:5. If the primary power wire is inserted through the opening, it will require a current of 600 amps to deflect the meter full scale. If the primary power conductor is looped around and inserted through the window a second time, the primary now contains two turns of wire instead of one. It requires ____ amps of current flow in the primary to deflect the meter full scale.
A) 125
B) 200
C) 300
D) 600

Question

Quizplus · Accepted Answer

When the primary conductor is looped twice, the effective turns ratio is halved, so it requires 300 amps to deflect the meter full scale.

A Current Transformer Has a Ratio of 600:5