The components of the transformer include the body (iron core, winding, insulation, lead wire), transformer oil, oil tank and cooling device, voltage regulating device, protective device (moisture absorber, safety airway, gas relay, oil storage cabinet and temperature measurement device, etc.) and outgoing bushing. Specific composition and functions:

(1) Iron core. The iron core is the main magnetic circuit part in a transformer. Usually with a high silicon content and thicknesses of 0.35mm, 0.3mm, and 0.27mm respectively, it is made by stacking hot-rolled or cold-rolled silicon steel sheets coated with insulating paint on the surface. The iron core is divided into two parts: the iron core column and the horizontal plate, and the iron core column is covered with a winding; Horizontal plates are used for closed magnetic circuits.

(2) Winding. The winding is the circuit part of a transformer, which is wound with double wire insulated flat wire or enameled round wire. The basic principle of a transformer is the principle of electromagnetic induction. Taking a single-phase dual winding transformer as an example, its basic working principle is explained: when a voltage U1 is applied to the primary winding, the current I1 flows through it, generating alternating magnetic flux O1 in the iron core. These magnetic fluxes are called the main magnetic flux. Under its action, the two windings induce electromotive force, and finally drive the transformer control device.