Primary Voltage Ratings: 132 kV                                             Secondary Voltage Ratings: 33kV
TYPE: 3 PH Oil Transformer                                                     Standards: IEC,EN
Power Rating: 75 MVA                                                               Cooling Method: ONAN/ONAF

The 132 kV, 75 MVA transformer is designed for three-phase systems at 50 Hz, withstanding short circuits up to 2 seconds without damage. It features a ±5% tap changer on the HV side, IP55 protection, and forced oil-air cooling. Key accessories include a conservator with magnetic oil level indicators, a Buchholz relay, and various temperature and oil gauges. The transformer undergoes rigorous type and routine tests, including lightning impulse and short-circuit tests, ensuring reliable performance.

General Description

The 132 kV, 75 MVA transformer is designed for use in three-phase power systems operating at 50 Hz. This transformer can endure the thermal and mechanical effects of a maximum short circuit at its terminals for up to 2 seconds without sustaining permanent damage, while maintaining winding temperatures below the permissible maximum of 250°C across any tapping position.

Tap Changer

The transformer is equipped with a tap changer installed on the high-voltage (HV) side. It features five steps, allowing voltage adjustment within a ±5% range in 2x2.5% fully rated steps both above and below the nominal primary voltage.