The transformers TM 250/10/0,4 24500 new UAH

Transformer oil power step-down three-phase two-winding TM-250

Oil power transformers with a rated capacity 250 kVA, three-phase step-down common purpose voltage up to 35 kV, used in the national economy for outdoor and internal installation.

Technical characteristics of the transformer:

Power double oil step-down transformer TM-250 voltage is:

a secondary winding with low voltage 0.4 kV for TM transformers with a capacity in the range up to 4000 kVA

a secondary winding with low voltage 6.3 kV and 10.5 kV for transformers TM's capacity to the range from 1000 to 6300 sq-A

- primary winding with high voltage up to 35 kV (inclusive)

By agreement any suggestions stresses.

The group and the scheme connections - Y/Yn- 0.D/Yh-11;

It is possible to produce transformer with different levels of loss short circuit and idling.

Regulated voltage without excitation. For such transformers contain high voltage switches WSP, which, in turn connected to a coil with a high the tension. If you unplug the transformer, they will allow you to adjust the voltage levels with a range of±2x2,5% from high-voltage (HV) and low voltage(LV).

According to GOST 11677-85, a tolerance of technical parameters of the transformer are:

-Full weight +10%.

-Idling losses TM +15%

-Loss circuit the main branch +10%

-Voltage circuit ±10%

Conditions transformer:

The temperature of the surrounding air:

for moderate the environment - from -45°C to +40°C ("Y")

-for cold environment environment - from -60°C to +40°C ("PI")

Height over sea level not more than 1000 m

Humidity (relative) up to 80% at the temperature +25°C.

Transformer double oil not designed for functioning:

- aggressive and explosive environment, which contains high concentrations of dust

- when you shake and vibration

- when with the HV up to ten times a day

Design transformers:

The transformer corrugated tanks, they have a rectangular shape for transformers power 6300 and 4000 kVA .Transformers power from kW to 2500 kVA radiator tanks. To to raise the transformer and the tank is assembled using hooks that located under the top frame of the tank. Also there is a tube (valve) on the cover tank, which is used for filling oil in the bottom of the tank there plug (cap) for draining oils and tube(valve), for sampling bolt for grounding.

Main (active) part TM of the transformer consists of a magnetic wire, which is made of cold-rolled electrical steel and windings.

Winding the oil two-winding transformers copper or aluminum.

Plays an important role maslorazdatochnye tank, which ensures the constant availability of oil at different variations the ambient temperature for all modes of operation oil of the transformer.

In turn the air drier protects the oil from adverse effects of air outside. It is filled with a sorbent that absorbs moisture coming into the transformer.

The oil gauge is for precise control over the level of transformer oil.

Rollers are used to transverse and longitudinal shifting transformers, installed in oil-immersed transformers with rated power from kW and above.

Power, kVA

Idling losses, W/ short circuit, W U/UN-0

Short circuit losses, W D/UN-11

The short circuit voltage, %

Oil weight, kg Weight, kg

250

550/3700

4200

5

255/1015