When a toroid current transformer is used to measure AC current, the main power line acts as the ____ and is considered to be one turn.
A) secondary winding
B) primary winding
C) hollow core frame
D) AC rectifier

Question

Quizplus · Accepted Answer

The main power line acts as the primary winding in a toroid current transformer. The secondary winding is made up of a few turns of wire wrapped around the toroid core. The hollow core frame simply holds the toroid core in place and does not play a role in the measurement process. An AC rectifier may be used to convert the AC current measurement into a DC voltage signal for further processing.

When a Toroid Current Transformer Is Used to Measure AC