Oil-Filled Transformers

January 10, 20230

Oil-Filled Transformers

What are Oil-Filled Transformers?

Oil-filled transformers are electrical devices that are used to either increase or decrease the voltage of an alternating current (AC) electrical supply. They consist of a core made of laminated iron or steel and two or more windings, which are coils of wire. The windings are insulated from each other and from the core by a layer of oil.

The function of the oil in an oil-filled transformer is to provide cooling and insulation for the windings and core. The oil absorbs the heat generated by the transformer during operation and conducts it away from the windings and core, helping to prevent overheating and damage. The oil also acts as an electrical insulator, helping to prevent short circuits and ensuring that the transformer operates safely.

Oil-filled transformers are used in a wide variety of applications, including power generation, transmission, distribution, as well as in industrial and commercial settings. They are typically used to transform high-voltage electricity into lower-voltage electricity for use in homes and businesses, or to increase the voltage of electricity for transmission over long distances.

How are Oil-Filled Transformers Structured?

The structure of an oil-filled transformer typically consists of the following components:

Core: The core is made of laminated iron or steel and provides a path for the magnetic field that is created by the transformer. It is usually shaped like a doughnut or cylinder and consists of thin layers of iron or steel that are stacked together and held in place by bolts or welds.

Windings: The windings are coils of wire that are wound around the core of the transformer. There are typically two or more windings, which are insulated from each other and from the core by a layer of oil. The windings are connected to the primary and secondary circuits of the transformer and are used to transfer electrical energy from one circuit to the other.

Oil: The oil in an oil-filled transformer serves several purposes. It acts as a coolant, helping to dissipate the heat generated by the transformer during operation. It also acts as an electrical insulator, helping to prevent short circuits and ensuring that the transformer operates safely. The oil is typically stored in a tank or reservoir, which is located inside the transformer.

Tank: The tank is a container that holds the oil and the windings of the transformer. It is usually made of metal or other durable material and is designed to withstand the high pressures and temperatures that are generated inside the transformer. The tank is typically sealed to prevent leaks and is equipped with vents to allow excess gases to escape.

Bushings: The bushings are insulating devices that are used to connect the transformer to the electrical supply. They are typically located at the top of the tank and are used to transfer electrical energy from the primary circuit of the transformer to the electrical supply, or from the electrical supply to the secondary circuit of the transformer.

Cooling system: Most oil-filled transformers are equipped with a cooling system, which helps to dissipate the heat generated by the transformer during operation. The cooling system may consist of a radiator, fan, or other components that are used to cool the oil and the windings of the transformer.

Protective devices: Oil-filled transformers are typically equipped with protective devices, such as fuses and circuit breakers, which help to prevent overheating and damage. These devices are used to interrupt the flow of electricity in the event of a malfunction or fault in the transformer.

VEKMAR is an official distributor of HITACHI Energy, Eaton, Astor, Eltaş, BEST and SEM oil type transformers. Reach out to us today and get a commercial & technical offer for all your oil type transformer needs from our experienced team.

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