Oil Immersed Transformer

As a professional oil immersed transformer factory our oil immersed transformers are specially developed and designed based on the advanced technology abroad for rough mountainous topography and transportation difficulties to meet the requirement of China Grid. The main characters of the oil filled transformer are low loss, low noise, and strong resistance of short circuit and free of core checking.

Oil Immersed Transformer Types

220KV Power Transformer
220KV series oil filled transformer produced with global advanced technology and equipment, continuously updating the manufacturing experience and processing. We developed high-grade power transformer that sufficiently satisfy the operation conditions of domestic and foreign power grid.

110KV Power Transformer
110KV oil-immersed power transformers strictly designed and produced with the IEC standard and most advanced technology have great reputation and the best sell performance all over the world.

35KV Power Transformer
35KV oil-immersed power transformers designed and manufactured with the IEC standard keep reliable working performance and excellent selling record for decades.

Earthing Transformer
Earthing transformers manufacturing with advanced equipment and experience have the characteristics of low loss, low noise, strong protection for lightning and short-circuit resistance.

How to Choose a Transformer: Dry Type vs. Oil Cooled
There are two types of transformers in the industry: dry type power Chinese transformer and oil immersed transformer. Dry use air as the cooling medium, liquid cooling uses oil. Although the final results of both types are the same, there are still many differences between different types of power transformers, which will affect the type you choose.
Maintenance: Oil immersed type transformers require more maintenance procedures, and are more often performed than dry type power transformers. Oil sampling is required to test contaminants, while dry type transformers are very resistant to chemical contaminants.
Cost (initial and operational): Dry type transformer has higher operating losses than oil immersed one. The oil immersed type transformer has higher standard energy efficiency, so it has longer service life than a dry type transformer.
Noise: The operating sound pressure of oil immersed transformer is lower, so it has less noise pollution than a dry type transformer.
Recyclability: Life cycle recovery of dry type transformer is limited, while core/volume recovery of oil immersed one is easier. Our oil immersed transformer has excellent service life and maintainability, and produces less waste, and requires less replacement and labour.
Efficiency: Dry type power transformers are larger devices, but their voltage and size are limited, and they are more likely to overheat if overload happens. As a result, dry type transformers have higher power losses and cost more to keep dry power over time. Oil immersed distribution transformers are smaller and more efficient. They need less and create smaller environmental footprints.
Voltage capacity: Dry type transformer is designed to deal with medium and small MVA and rated voltage, making it an ideal choice for small applications. Oil immersed distribution transformer can bear a heavier load, so it is for higher voltage application.
Location: The location of the transformer will be the critical determinant of which type you need. Dry type is specified for use near buildings and buildings only because they are safer for the environment. Dry type power transformer is not flammable and has little fire hazard, which makes it very suitable for large shopping centres, hospitals, residential quarters and other commercial areas. Oil filling transformers will be used when installed outdoors, which may cause oil leakage and may cause fire, but these equipment are more environmentally friendly."