6-10 kV Three-phase oil-immersed transformers ТМТО type

  Technical data
  Three-phase transformers ТМТО are available with primary windings rated voltage (HV) 380V inclusive and secondary voltage (LV) - 36V, with a step voltage control on HV or middle voltage (MV) winding.
  For that feature, the transformers are equipped by voltage selector, which connects to middle voltage winding. Voltage regulated without excitation while the transformer disconnected from HV and LV mains. Control range - from 45V to 105V.
Diagram and winding connection group Y/∆-11 or Y/∆/∆-11-11.
Terms of use:
Altitude - up to 1000 m.
  Ambient temperature:
- for temperate climate - from –45^ОС to +40^ОС
The transformers are not designed to operate:
- In the explosive and corrosive medium (containing gases, vapors, dust, increased concentration, etc.);
- Under vibration and/or shock influence.
  The design of transformers
  The tanks are rectangular. To increase the transformer cooling surface, the radiator is made of corrugated wall. For lifting the tank or the assembled transformer, the hooks arranged under the upper tank frame are used. On the lid of the tank there is a drain valve, at the bottom of the tank there is an oil drain plug, sampling valve (tube), grounding bolt.
  The active part consists of a magnetic core made of cold rolled electrical steel, windings and switch. The windings of transformers are aluminum. The HV, MV and LV bushings are outdoor installation, located on the lid, removable, with polymeric insulators. Level indicators for monitoring the oil level is fixed to the tank wall.