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ТМГ21 transformers

Power:

630 … 3200 kV·A

Voltage:

HV: 6 … 35 kV;

LV: 0,4 kV

Voltage:

Yyn0
Dyn11

Warranty:

5 years

Voltage:

Transformers TMG21 are three-phase general purpose oil transformers.

The low voltage winding of the transformers of this series is not made of aluminum wires, but of aluminum foil, which combines the simplicity of winding with a high level of reliability.

The width of the aluminum strip is equal to the height of the low voltage winding – this significantly reduces the axial dynamic forces in the transformer.  As an interlayer insulation, paper of the DDP type is used, which is sintered during the drying of the windings.  Thus, a dense, integral structure is created with increased resistance to radial forces.


Transformers TMG21 are three-phase general purpose oil transformers.  Transformers are manufactured with a combination of voltages 6/0.4 kV; 6.3/0.4 kV; 10/0.4 kV; 10.5/0.4 kV, with circuits and groups of connecting the windings Dyn11 and Yyn0.

According to GOST 11677, the maximum deviations of the technical parameters of the transformers are: short-circuit voltage ± 10%;  short circuit loss on the main branch + 10%;  loss of idling + 15%;  gross weight + 10%.

The low voltage winding of the transformers of this series is not made of aluminum wires, but of aluminum foil, which combines the simplicity of winding with a high level of reliability.

The use of modern winding and insulating materials allows you to create a design in which the negative effects of shock currents of external short circuit are minimized.  The width of the aluminum strip is equal to the height of the low voltage winding – this significantly reduces the axial dynamic forces in the transformer.  As an interlayer insulation, paper of the DDP type is used, which is sintered during the drying of the windings.  Thus, a dense, integral structure is created, which has increased resistance to radial forces.

To control the oil level in the transformers, a float type oil indicator is provided.

To control the internal pressure in the tank and alarm if it exceeds the permissible values ​​in the transformers placed in the room, an electrocontact manovacuum meter is provided for by the customer’s order.

To measure the temperature of the upper layers of oil on the transformer cover, a sleeve is provided for installing a liquid glass thermometer, which transformers are equipped with upon request of the consumer.

To measure the temperature of the upper layers of oil and control external electrical circuits, transformers designed for operation in a room or under a canopy are equipped with a manometric signaling thermometer by order of the consumer.

The neutral inlets and outlets of the LV transformer windings are designed for continuous load with a current equal to 100% of the rated voltage of the LV transformer winding.

Transformers are equipped with transport rollers for moving in both longitudinal and transverse directions.