ТМГ12 transformers (energy-saving)
250 … 1250 kV·A
HV: 6 … 15 kV
LV: 0,4 kV
|Wiring diagrams and connection groups:||
Hermetic three-phase oil transformers without oil conservators are designed to convert electricity in the networks of power systems and electricity consumers.
The level of no-load and short-circuit losses in this series of transformers complies with CENELEC recommendations. The neutral input of the LV side of the transformer is designed for a continuous load with a current equal to 100% of the rated current of the LV coil.
Production using a number of technical solutions that increase the reliability and reduce the operating costs of the TMГ series transformers
Temperature changes in the oil volume are compensated by a change in the volume of the tank corrugations due to their elastic deformation
The level of no-load and short-circuit losses in this series of transformers complies with CENELEC recommendations.
Solving pressing issues of energy conservation, we offer a new development – transformers TMG12 with a capacity of 250 … 1250 kV·A. The level of no-load and short-circuit losses in this series of transformers is set in accordance with the recommendations of the European Committee for Electrotechnical Standardization (CENELEC) and reduced (compared to transformers of other series, as well as transformers of other manufacturers), which can significantly reduce costs during operation of the equipment. At the same time, the noise characteristics of transformers are improved.
TMG12 three-phase oil transformers are designed to convert electricity in the networks of power systems and electricity consumers in an outdoor or indoor installation of moderate (from plus 40 to minus 45 °C) or cold (from plus 40 to minus 60 °C). The environment is non-explosive, does not contain dust in concentrations that reduce the parameters of products in unacceptable limits. Transformers are not designed to work in conditions of shaking, vibration, shock, in a chemically active environment. Installation height above sea level no more than 1000 m.
Rated frequency 50 Hz. Voltage regulation is carried out in the range up to ± 5% on a completely disconnected transformer by switching the branches of the HV winding in steps of 2.5%.
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%.
TMG12 transformers of tight execution, without oil conservators.
Temperature changes in oil volume are compensated by a change in the volume of the tank corrugations
due to their elastic deformation.
To control the oil level in the transformers, a float type oil indicator is provided. By order of the consumer, for the control of the internal pressure in the tank and the alarm system in case of exceeding the permissible values in the transformers placed in the room, the installation of an electrocontact manovacuum meter is provided. To measure the temperature of the upper layers of oil and control external electrical circuits, the transformers are equipped with a manometric signaling thermometer by customer order.
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 the transformer in the longitudinal and transverse directions.
Technical characteristics of transformers TMG12 Scheme and group of connection of windings – Yyn0, Dyn11, voltage LV – 0.4 kV