Oil single-phase railway transformers type OMŻG

Single-phase oil railway transformers OMŻG with capacities from 1.25 up to 10 kVA for rated voltage of the primary windings 27.5 kV designed for electrical supply of rail traction
To increase the cooling surface of transformers OMŻG corrugated walls are mounted.
Railway transformers are manufactured for rated voltage of the primary windings 27.5 kV. Rated voltage of the secondary windings is 0.23 kV. Scheme and connection group of windings is 11-0

Design features

Transformers designed to be mounted separately on electric poles and connected to the permanent installation of electrical boxes and can also be used for other single-phase devices as proposed in project.

Regulation of the transformer is carried out by the switch, which is installed on the active part of the HV side.

Oil railway transformers OMŻG are manufactured with hermetical construction of the tank, so the oil has no contact with environment. Hermetic transformers are completely filled with transformer oil.
Conservator and air or gas “cushion” does not occur.
Changing the oil volume caused by a change of its temperature is compensated by the deformation of the corrugated tank.
The oil has no contact with the environment at all.
Thus, the working conditions of oil are significantly improved by eliminating moisture and oxidation.
Transformers OMŻG practically does not require any cost to run and maintain during operation. It does not need preventive maintenance and control throughout the lifecycle.

For the control of filling the tanks with oil transformers OMŻG are equipped with oil level indicator located on the cover.

For measuring the temperature of the upper layer of oil in the tank is installed the thermometer.

Dimensions and weight of the oil transformers OMŻG

Technical drawing of the transformer OMŻG

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А
ОМЖГ-1,25/27,5-У1 595 445 1000 550 400 180
ОМЖГ-2,5/27,5-У1 595 445 1000 550 400 180
ОМЖГ-4/27,5-У1 595 445 1000 550 400 195
ОМЖГ-6/27,5-У1 655 470 1050 600 434 215
ОМЖГ-10/27,5-У1 655 470 1050 600 434 240