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Power Transformer

Heavy-duty high-voltage equipment designed for transmission networks and large industrial substations. Built for maximum efficiency and short-circuit resilience.

High Voltage Oil Immersed
Capacity Range 1 MVA to 50 MVA+
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What It Does

Power Transformers are the heart of the electrical grid. They are used to step-up or step-down voltage at high power levels (typically above 33kV) to ensure efficient transmission over long distances or to feed large industrial loads.

Unlike distribution transformers which run at varying loads, Power Transformers operate at near full load for maximum efficiency and are designed to withstand extreme electrical stresses.

Construction & Working

Our transformers are built using Step-Lap CRGO Core technology:

1. Magnetic Core: Made from high-grade Cold Rolled Grain Oriented (CRGO) silicon steel to minimize hysteresis losses.
2. Windings: Electrolytic grade Copper conductors (Paper Covered) are wound to withstand high thermal and mechanical stress.
3. Oil Cooling: The core-coil assembly is immersed in mineral oil, which provides insulation and transfers heat to the radiators.
4. Voltage Regulation: Equipped with an On-Load Tap Changer (OLTC) to adjust voltage without interrupting the power supply.

Key Features

Short Circuit Proof

Rigid mechanical design ensures the unit withstands massive fault currents.

High Efficiency

Designed for low No-Load and Load losses, meeting IS 2026 / IEC standards.

Advanced Cooling

Efficient radiator design with options for ONAN, ONAF, or OFAF cooling.

Precise Regulation

Remote Tap Changing Control (RTCC) allows voltage adjustment from the control room.

Technical Specifications

Power Rating Up to 50 MVA (Customizable)
Voltage Class 11kV / 33kV / 66kV / 132kV / 220kV
Cooling Method ONAN (Oil Natural Air Natural) / ONAF (Fan Cooled)
Tapping Range +5% to -15% (in steps of 1.25%) via OLTC
Vector Group Dyn11 / YNd11 (As per requirement)
Winding Material 99.9% Electrolytic Copper
Standards Compliance IS 2026, IEC 60076, BEE Star Ratings

Typical Applications

Steel & Cement Plants Solar & Wind Farms Grid Substations (33/11kV) Urban Power Distribution Railway Traction Large Data Centers