Oil-immersed transformer is an important equipment in power distribution system. How does it work? Today, the editor of Anhui Dali Power will tell you the principle of oil-immersed transformer.

The principle of oil-immersed transformer is as follows:

Oil-immersed transformer components include body (iron core, winding, insulation, lead wire), oil-immersed transformer oil, oil tank and cooling device, voltage regulator, protection device (hygroscopic device, gas relay, oil conservator and temperature measurement devices, etc.) and outlet bushings.

The working principle of the oil-immersed transformer is mainly based on electromagnetic induction. On its closed iron core, two mutually insulated windings are wound. The side that connects to the power supply is called the primary winding, and the side that outputs the electrical energy is called the secondary winding.

When the AC power supply voltage is applied to the primary side winding, an AC current will pass through the winding, and an alternating magnetic flux will be generated in the iron core. This alternating magnetic flux can not only pass through the primary side windings, but also through the secondary side windings, generating induced potentials E1 and E2 in the two windings, respectively. At this time, if the load of the secondary side winding and the external circuit is connected, there will be current flowing into the load, that is, the secondary side winding will have power output.