The three-phase oil-immersed transformer is an essential electrical equipment in power systems.
Structure and Components:
- Core: Made of high-quality silicon steel sheets, it provides a path for the magnetic flux. The core is usually constructed in a three-legged or five-legged shape to accommodate the three-phase windings.
- Windings: Comprise the primary and secondary windings. The primary winding is connected to the input power source, and the secondary winding delivers the transformed voltage. These windings are carefully insulated to prevent short circuits.
- Tank: Holds the insulating oil. The oil serves multiple purposes, including insulation, cooling, and suppressing arcing.
- Cooling System: May include natural cooling (radiators) or forced cooling (fans or oil pumps) to dissipate the heat generated during operation.
- Bushings: Provide electrical insulation between the windings and the external connections.
Working Principle:
Based on the principle of electromagnetic induction, when an alternating current passes through the primary winding, a magnetic field is generated. This magnetic field induces a voltage in the secondary winding, thereby transforming the input voltage to a different voltage level.
Advantages:
- High Efficiency: Offers efficient voltage transformation with minimal power losses.
- Reliability: The oil insulation provides good electrical insulation and protection against external influences, ensuring reliable operation over a long period.
- Cooling Effectiveness: The insulating oil effectively cools the windings and core, allowing the transformer to handle high power loads.
- Voltage Regulation: Some models have the ability to adjust the output voltage to meet different load requirements.
Applications:
Widely used in power generation plants, substations, industrial facilities, and large commercial buildings to step up or step down voltages for efficient power transmission and distribution.
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Products 
Oil Immersed Transformer
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