Oil-Cooled Power Transformers, Type TM, TMF, TMB, TME

 Step-Down Three-Phase Oil-Cooled Power Transformers, Type TM,TMF

The UZTT Company has its own facilities for manufacturing of oil-cooled power transformers, type TMF, TMG, TMGF, TMZ, and TMB. Oil-cooled power transformers have certificate of conformity No. ROSS RU.AV28.V00284.

High voltage: 10 kV or 6 kV
Low voltage: 0.4 kV or 0.23 kV
Capacity: 16 kVA, 25 kVA, 40 kVA, 63 kVA, 100 kVA, 160 kVA, 250 kVA,  400 kVA,  630 kVA, 1000 kVA, 1600 kVA, 2500 kVA; step-down transformers with voltage of 10/0.4 kV, 6/0.4 kV, 10/6 kV - step-down transformers (from 6 kV to 0.4 kV); step-up transformers with voltage of 0.4/10 kV, 0.4/6 kV, 6/10 kV - step-up transformers.

The UZTT factory manufactures three-phase oil-cooled transformers with capacity of 16 kW, with HV voltage of 10 kV or 6 kV, with LV voltage of 0.4 kV or 0.23 kV; transformers of this family are used in package transformer substations, type KTP, KTPN, and BKTP and are designed to convert power in networks of electric power systems and energy consumers as well as to meet requirements of municipal infrastructure, civil construction, farming facilities and operations as well as other requirements of national economy. Power transformers have long service life; they are reliable and easy in operation.

Power transformers manufactured by the UZTT Company convert one voltage ac current into another voltage ac current to provide electrical energy to consumers. Depending on their application, power transformers can be step-up or step-down transformers.

Three-phase oil-cooled transformers, type TM, TMF, TMZ, and TMB

Oil-cooled transformers of this family are used for electric networks with voltage of 6 kV or 10 kV in outdoor electrical installations in temperate climates (configuration U1 in compliance with GOST 15150-69) and serve to decrease high voltage of the supply network to the specified consumer voltage.
TMB-type transformers are used to provide power to electrical equipment of drilling rigs; TME-type transformers are mounted on excavator platforms to supply electricity to their equipment; TMF-type transformers are used for flange mounting.

Voltage is regulated within ± 2х2.5 % of its rated value by changing the tapping on the high voltage side through the five-step switch with the drive mounted on the transformer lid. Tap changing is performed in absence of voltage on the transformer.

Range of rated linear voltages

Power transformers are designed for 6 kV or 10 kV rated voltage of the primary winding. The rated voltage of the secondary winding is 0.4 kV or 0.23 kV. The diagram and connection group of windings is U/Un-0 or D/Un-11.
In temperate climates, the ambient operating temperature is from + 40°С to - 45°С; in cold climate, the ambient operating temperature is from +40°С to - 60°С.

The rated capacity range: TM-type transformers - from 25 to 2500 kVA; TMF - from 250 to 1000 kVA; TMZ - from 400 to 2500 kVA.

Altitude at installation - max 1000 m.
Operating frequency - 50 Hz.
Ensure that the operation of TM-family transformers is not adversely impacted by shaking or vibrations or chemically aggressive environment. Non-explosive environment free of current-conducting dust;

Tanks of all TM transformers have rectangular form; they are equipped with oil-cooling radiators located along the tank. The tank walls are made of ribbed 2.5-4 mm thick steel sheeting, thus ensuring reliable operation of transformers and high shell resistance to deformation during transportation by any types of transport as well as absence of residual deformations that may be caused by temporary excessive pressures up to 150 kPa (1.5 kgf/cm²) and up to 300 kPa (3 kgf/cm²) without any risk of structural destruction.

Oil-cooled power transformers, type TMF and TMB, are manufactured with the expansion tank:

the internal chamber of transformers has ambient connection. Temperature changes in oil volume that take place during operation are offset by the expansion tank volume.
To monitor the oil level, transformers are equipped with the oil-level indicator located on the wall of the expansion tank. The tank is also equipped with the sorbent dehumidifier and oil plug.

To localize consequences of accidents that may be cause by severe internal damage to the transformer, TMF and TMZ-type 1600kVA+ transformer tanks are equipped with protective pipes with built-in diaphragm valves intended for emergency discharge of oil in case of sudden increase in excessive pressure exceeding 150 kPa (1.5 kgf/cm²). With normal operation of the TM transformer, these valves do not require any additional maintenance during entire service life (the projected service life for TMG transformers is 25 years (10,000 cycles per max and min exposure). To monitor internal pressure in the tank with the relevant warning signal if allowed limits are exceeded in 1000 kVA+ transformers placed indoors, (at the customer's request) transformers can be equipped with the electric-contact vacuum pressure gauge.

All transformers can be equipped with standard alcohol or electric-contact manometric thermometers for remote control over temperature to keep it within the set limits. Transformers can be equipped with electric-contact vacuum pressure gauges. The manometric signal-producing thermometer can be ordered by the customer to check temperature of the upper oil layer and control external electric circuits in transformers with capacity of 630 kVA and above.

High voltage and low voltage entrance bushings are placed vertically and are arranged in longitudinally directed parallel rows on the lid of the transformer tank.
For TMF and TMZ-type transformers, high voltage and low voltage entrance bushings are placed horizontally and are located on end (short) walls of the tank on its opposite sides. The entrance bushings have boxes, thus providing flange coupling of transformers with the relevant distribution units. At the customer's request, a cabinet can be installed on the side of HV entrance bushings in TMF-type transformers. The cabinet design provides for possibility to install two cable sealing boxes. The cabinet has locks and safety signs. For TMF and TMZ-type transformers, low voltage entrance bushings can be placed from left to right or from right to left, depending on the specified instructions of the customer.

Transformers with 160 kVA capacity can be equipped with contact terminal clamps that are mounted on LV entrance bushings; the clamps can be offered in 2 configurations - either for bus connection or cable connection.

Plates or channel bars with holes to secure the transformer on the foundation platform are welded to the tank bottom. At the customer's request, for transformers with capacity of 160 kVA and above, channel bars can be equipped with adjustable rollers that provide for longitudinal or crosswise movement of the transformer. The downside of the tank has grounding assembly and a drainage plug.

Transformers are transported in completely assembled form and filled up with oil.

Prices for oil-cooled power transformers, rubles:

Structure of the symbol legend for transformers:

Specifications for TMF transformers:

Specifications:

To make an order, please, fill in the DATA SHEET for oil-cooled power transformers

Ural Company for Transformer Technologies is looking forward to cooperation with foreign companies, organizations, and firms that require electrical equipment.

Other transformers:

Oil-Cooled Power Transformers, Type TMG, TMGF
Oil-Cooled Power Transformers, Type TMZ
Oil-Cooled Power Transformers, Type OM
Oil-Cooled Power Transformers, Type OMP
Oil-Cooled Power Transformers, Type OL
Oil-Cooled Power Transformers, Type NOM
Oil-Cooled Power Transformers, Type TMPN (TMPNG)
Dry-type Power Transformers, Type TSZ
Three-Phase Railroad Transformer TMZH

Ryssian version of TM, TMF, TMB, TME