Working principle of current transformer

- Sep 18, 2020-

The principle of current transformer is based on the principle of electromagnetic induction. The current transformer is composed of a closed core and windings. Its primary winding has a few turns, which are stringed in the circuit where the current needs to be measured. Therefore, it often has all the current of the line flowing. The secondary winding has more turns, which are connected in series in the measurement appearance and maintenance loop. When the current transformer is in operation, its secondary side loop is always closed, so the impedance of the series coil of the measuring appearance and the maintenance loop is very small, and the working state of the current transformer is close to short-circuit. The current transformer is used to convert a large current on the primary side into a small current on the secondary side, and the secondary side cannot be open.