Oil three-phase railway transformers type TMŻG

Three-phase oil railway transformers TMŻG with capacities from 25 to 1000 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 TMGŻ 25 – 1000 kVA with the conservator corrugated walls are mounted.
Voltage regulation is made by tap changer after disconnection transformer from the HV and LV supply.

The voltage is adjustable on the HV side by value ± 2×2.5% of the nominal value.
Railway transformers are manufactured for rated voltage of the primary windings 27.5 kV. Rated voltage of the secondary windings is 0.4 kV. Scheme and connection group of windings is Yyn-0

Design features

Oil railway transformers TMŻG 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 TMŻG 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 TMŻG 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 TMŻG 25 – 63

Technical drawing of the transformer TMŻG 25 – 63

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А Б Г И Oil Total
ТМЖГ-25/27,5-У1 1020 720 1280 800 450 450 90 36 235 740
ТМЖГ-63/27,5-41 1120 740 1370 905 550 450 90 40 205 610

Dimensions and weight of the oil transformers TMŻG 100 – 400

Technical drawing of the transformer TMŻG 100 – 400

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А Б Г К Е И Oil Total
ТМЖГ-100/27,5-У1 1190 740 1420 925 550 420 100 100 250 40 260 940
ТМЖГ-160/27,5-У1 1300 770 1500 1050 660 440 100 100 250 40 340 1230
ТМЖГ-250/27,5-У1 1330 925 1550 1085 660 450 110 110 380 46 410 1690
ТМЖГ-400/27,5-У1 1690 955 1900 1380 820 450 120 120 390 52 430 2185

Dimensions and weight of the oil transformers TMŻG 630 – 1000

Technical drawing of the transformer TMŻG 630 – 1000

Designation of the transformer Dimensions, mm Weight, kg
L В H Н1 А Б Г К Е И Oil Total
ТМЖГ-630/21,5-У1 1865 1035 2015 1500 820 450 130 120 435 58 745 2905
ТМЖГ-1000/27,5-У1 1935 1040 2235 1700 820 450 180 120 435 58 915 3895