Oil Immersed Transformer

An oil-immersed transformer, also called Oil filled transformer, is a kind of voltage transformation device utilizing the oil cooling method to reduce the transformer temperature. Unlike the dry type transformer, the body of the Oil-immersed transformer is installed in the welded steel oil tank filled with insulation oil. When an Oil-immersed transformer in operation, the heat of the coil and iron core firstly is transformed into the insulation oil and then to the cooling medium. And according to the capacity sizes, it can be divided into an immersed natural cooling transformer and an immersed forced air cooling transformer.

oil immersed power transformer

Structure and operation principle of Oil-immersed transformer

An Oil-filled transformer is structurally similar to that of a transformer. It's one of the types of transformers classified according to the form of core insulation. Hence, it has the identifiable feature of oil-immersed coils to lower the heat map of the devices within it.

The basic elements of an oil-immersed are consist of the magnetic core, windings, and bushings. The magnetic core provides a path for magnetic flow. Windings create a magnetic field and consist of a conductor coil, wrapped around the core and insulated with pressboard barriers and screens. The thickness of the winding insulation increases with voltage. Bushings connect transformer windings to a substation.

Oil-type transformers are used in power distribution or electrical substations. Their core and coils are immersed in Oil, which cools and insulates. Oil circulates through ducts in the coils and around the coils and core assembly, moved by convection. The Oil is cooled by the outside of the tank in small ratings, and by an air-cooled radiator in larger ratings.

oil immersed current transformer factory

GNEE Electric Co., Ltd. was established in 2008 and is located in Anyang City, Henan Province. It is a digital management enterprise integrating R&D, production, sales and installation of power equipment. The company's products cover 6kv, 11kv, 22kv, 35kv and other power transformers, distribution transformers, box-type substations, high and low voltage switch cabinets, wind power, photovoltaic power generation equipment, etc. GNEE products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa and other regions, covering more than 50 countries.

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