The control transformer is a kind of small dry-type transformer. It is often used as local lighting power supply, signal lamp or indicator lamp power supply, and as control circuit power supply in electrical equipment. The control transformer is mainly applicable to the circuit with AC 50Hz (or 60Hz), voltage of 1000V and below, and can work continuously for a long time under rated load. It has the characteristics of small size, safe and reliable wiring, high level of protection and good performance.
Working principle of control transformer：
The control transformer works on the principle of electromagnetic induction. The transformer has two sets of coils.：Primary and secondary coils. When the primary coil is connected with alternating current, the transformer core will generate alternating magnetic field, and the secondary coil will generate induced electromotive force. The turns ratio of satons transformer coil is equal to the voltage ratio.
Function of control transformer:
1. Convenient to obtain appropriate voltage;
2. Anti interference.