As is well known the Transformer plays an important role in the generation, transmission and distribution of electrical energy. Under load the transformer, dissipates heat and the insulating oil acts as a coolant as well as an effective dielectric.
Due to the highly hygroscopic nature of the transformer oil, it absorbs moisture from windings, which leads to gradual deterioration of dielectric strength. Also there are some waste impurities, gas contents in the transformer oil which destroy the oil's quality.

The Zhongneng Oil regeneration system (Series ZYD) has been specially designed for on site use to completely regenerate insulating oils in energized or de-energized transformers even when transformer power above 110KV and altitude over 500 meters, as well as purify mutual inductor oil, switch oil and so on.  Also it can inject the insulating oil into the transformers on-line and dry the transformer.

The ZYD system not only provides regular oil purification/ reclamation such as degassing, drying and particulate removal, but also can remove acidity, sludge, carbon deposits, sulfur, and other soluble oil decay products and improve physical & chemical properties comparable to new transformer oil.

This is accomplished by the use of high vacuum degasification technology and particulate filters combined with our special brand of earth. After treating, the oil can be reused as new.

This Oil purifier can be made in mobile type with trailer, hermetical, canopy-covering, open and frame style

Comparing with the single-stage vacuum oil purifier, this machine dewater, degas and removes the impurities more quickly, more completely, and makes the oils limiting voltage-withstand value much higher. As the bridge-type vacuum linking system that can purify and also can be an independent vacuum power supply, this machine can treat the electric insulation devices.