Description

High Vacuum Transformer Oil Purifier

I. GENERAL DESCRIPTION

Transformer oil conditioning machine is suitable for conditioning transformer oil and drying transformer insula­tion.

The oil-conditioning machine is mounted on a compact under carriage with suspension springs and pneumatic tyres. Screw jacks are provided to release load on tyres during operation and to level the machine horizontal on the ground. The complete machine is provided with sheet metal casing with necessary doors providing access to all controls and is suitable for outdoor operations.

The machine is designed for the following operations:

1. Conditioning of oil i.e. degassing, de-watering and filtering of transformer oil.

2. Evacuation of transformer

1. Conditioning of oil:

The oil, besides acting as a dielectric barrier, also carries the heat way. On the other hand, it absorbs water and gases from the atmosphere and solid insulation ageing products during service, resulting in a considerable decrease in its break down voltage, insulation resistance and increase in dielectric loss factor. Even commercial oil is seldom sufficiently pure for direct use in high voltage equipment, being subject to contamination in transport containers and liable to absorb unacceptable quantities of moisture and air because of contact with atmosphere.

Conditioning of the oil eliminates,
Solid impurities
Free and dissolved water
Free and dissolved gases
By degassing, de-watering and filtration, or breakdown voltage of the insulating oil can be substantially increased

Filtration

1. Ferrous and non-ferrous particles of above one mm in size are arrested by magnetic filter (2) provided
     before inlet gear pump.
2. Filtration of solid impurities is carried out by non-hygroscopic filter cartridges of high dust holding
    capacity.

 Degassing and Dehydration

Evacuation of the degassing chamber causes the water content in the oil to evaporate. The water vapour and gases released by the oil are extracted out from the degassing chamber by the vacuum pumps. At entry into the degassing chamber, the oil is distributed and directed through Raschig ring columns. The packed Raschig ring columns ensure distribution of oil into a thin film thereby maximizing exposure of each particle of oil to vacuum.
High Vacuum Transformer Oil Purifier

Model HVTP2500