Oil immersed power transformers

Dry power transformers

Railway oil transformers.

Single-phase transformers type OM

Transformers for concrete and soil heating type TMOB

A power transformer is an electromagnetic device with two or more windings which, by electromagnetic induction transform one voltage to another, typically of the same frequency and transmit electricity without changing the power.
Power transformer is used to change the electricity in the networks and electrical installations and further transfer it to the reception by electrical equipment. The word “power” reflects the type of work regime of transformers with high capacity. The demand for power transformers results due to a variety of operating voltage transmission lines (35-750 kV) and urban energy grids (usually 6, 10, 15,75, 21 kV) and the voltage supplied to end users (0.4 kV or 380 / 220 V).
Any use of electricity whether at home or at work is associated with changing the voltage, which is impossible without the power transformer.
Transformers in Ukraine are aging rapidly, so they require special attention.

Three-phase industrial transformers with capacity ratings from 10 up to 2500 kVA designed to be mounted on the outside and inside buildings.
Three-phase power distribution transformers are manufactured for voltages of the upper primary winding 6; 10; 15.75; 21 kV Rated voltages of low secondary winding are 0,4 or 0,23 kV.

Regulating the tension is made as a result of moving the tap changer, by the transformer detached from the net both high (HV) and low (LV) tensions.
The tension is being regulated on the side of HV for ±2×2,5% value from nominal value.
Depending on the purpose of the transformer we can describe two types: to lower or to raise the voltage.
Depending on the cooling and insulating system we can divide power transformers into dry or oil type.