Transformers can be divided according to purpose

Transformers can be divided according to purpose: distribution transformer, power transformers, sealed transformers, modular transformers,dry-type transformers, single-phase transformer, electric furnace transformer, rectifier transformers, reactors, interference transformers,lightning transformers, box-type variable electrical transformer test transformer corner. The most basic type of transformer,It includes two sets of wound coil wire, and another said inductively close together. When an alternating current (having a known frequency) flow in one set of coils, the other set of coils in the induction AC voltage having the same frequency, and the induced voltage depends on the two coils and magnetic cross coupling the extent of the chain.