Power Transformer

Oil Cooled Power Transformers belong to a standard range of 3000 KVA to 50 MVA. 33, 66, and 132 kV voltages class. A brief outline of its criteria-

  • Conformity with IS 2026, IEC 60076, ANSI, and other relevant application standards
  • Tolerant to electrical impulses as well as thermal and dynamic stresses
  • Optimization of active materials for compactness

Designed for step-up and step-down applications, the power transformer is used in the transmission network of higher voltages like 400 kV, 200 kV, 110 kV, 66 kV, 33 kV, etc. However, these types of transformers are generally rated 200MVA and above. The design of the power transformer is compatible with transmitting heavy load and high voltage i.e., higher than 33 kV with 100% efficiency. By comparing with the distribution transformer, the power transformer can be defined as bigger and they are used in transmission substations, power generation stations, and application areas with high insulation levels.

We are a popular name in power transformer manufacturing area with capacity upto 5 MVA, 3 Phase, 33 kV class and ONAN Cooling. Our Products are well-accepted for their hassle-free long performance, reliability, and very competitive price ranges.

Features of Power Transformer

  • Minimum 15 years life in design with hassle-free performance
  • Conformity with IS 2026, IEC 60076, ANSI, and other relevant application standards
  • Recognized for low power loss and low noise
  • Tolerant to electrical impulses as well as thermal and dynamic stresses
  • Known for optimization of active materials for compactness
  • Ensuring cost-effectiveness and reliability with modern manufacturing techniques

Specification

  • 3 phase, 50 Hz in voltages of 11kV, 22kV, 33kV
  • Off-circuit tap changer to provide ± 5 %,± 7.5% & +5% to -10% taps insteps of 2.5%
  • Class A, uniform/non-uniform insulated
  • Continuous duty, double copper wound
  • Painting as per IS/IEC standards
  • Both HV & LV side outdoor bushings or cable boxes
  • Cooling radiators/fans.
  • Cooler control unit.

Standard Fittings

  • Rating & Diagram Plate
  • Earthing terminals
  • Lifting Lugs
  • Thermometer Pocket
  • Air Release Plug
  • Conservator Tank
  • Cover Mounted Thermometer
  • Explosion Vent With Suitable Diaphragm
  • Oil Level Indicator
  • Drain Cum Oil Filter Valve
  • Top Oil Filter Valve
  • Bi-Directional Roller
  • Silica gel breather
  • Cooling Radiators
  • V & L.V Side cable box with copper bus-bar
  • Neutral - earth bushing for earthing of neutral
  • RTCC panel for On-Load Distribution Transformer

Protective Devices

  • Buchholz Relay with alarm and trip contact for transformers from 500 KVA to 5000 KVA
  • Oil Temperature Indicator with alarm and trip contact for transformers from 630 KVA to 5000 KVA
  • Winding Temperature Indicator with alarm and trip contact for transformers from 800 KVA to 5000 KVA
  • Magnetic Oil Level gauge with alarm contact for transformers from 1250 KVA to 5000 KVA

Optional Accessories

  • Neutral C.T
  • Jacking Pads
  • Shut-off Valves
  • Annunciation/Inspection Window
  • Pressure Release Valve with contacts

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Frequently Asked Questions