Oil three-phase railway transformers type TMŻ

Three-phase oil railway transformers TMŻ 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 TMŻ 25 – 1000 kVA with the conservator the radiator or 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

Transformers TMŻ are equipped with conservator, which provides the right amount of oil under all operating conditions of the transformer and fluctuations of ambient temperature.
In order to protect the oil from external weather conditions on conservator is mounted silicone dehumidifiers.
The dryer is filled with a sorbent which absorbs moisture before the entry air from outside inside the transformer.
To check the oil level on the side of the conservator is mounted floating magnetic oil level indicator.
To check the temperature in the upper layer of oil in the transformer tank is mounted thermometer.
Oil transformers with capacity ratings above 1000 kVA are provided with a Bochholz relay

Dimensions and weight of the oil transformers TMŻ 25 – 63

Technical drawing of the transformer TMŻ 25 – 63

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А Б Г И Oil Total
ТМЖ-25/27,5-У1 1020 810 1400 800 450 450 90 36 235 760
ТМЖ-63/27,5-У1 1120 795 1540 905 550 450 90 40 210 750

Dimensions and weight of the oil transformers TMŻ 100 – 400

Technical drawing of the transformer TMŻ 100 – 400

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А Б Г К Е И Oil Total
ТМЖ-100/27,5-У1 1190 920 1560 925 550 420 100 100 250 40 260 940
ТМЖ-160/27,5-У1 1300 920 1700 1050 660 440 100 100 250 40 350 1240
ТМЖ-250/27,5-У1 1330 950 1750 1085 660 450 110 110 380 46 420 1705
ТМЖ-400/27,5-У1 1445 990 1945 1380 820 450 120 120 390 52 445 2200

Dimensions and weight of the oil transformers TMŻ 630 – 1000

Technical drawing of the transformer TMŻ 630 – 1000

Designation of the transformer Dimensions, mm Weight, kg
L В Н Н1 А Б Г К Е И Oil Total
ТМЖ-630/27,5-У1 1875 1195 2005 1500 820 450 130 120 425 58 760 2940
ТМЖ-1000/27,5-У1 1920 1230 2320 1700 820 450 180 120 435 58 935 3920