As delivery time and purchase price of high voltage power transformers are constantly increasing, the extension of the life time of existing transformers becomes more essential
One of the major causes for transformer failure is aging of its insulation material. Paper, pressboard and wood form about 10% of transformer weight.
One decomposition product in the cellulose de-polymerization of these materials is water, which is stored in the insulation and partially in the transformer oil. Other reasons of water penetration in the transformer are transformer non-hermeticity and air dehumidifier malfunction. The well-established conventional process for transformer servicing is supply of dry air to transformer tank when disassembled. Therefore we offer our equipment
Principle of Operation
The unit operation principle is based on atmospheric air drying in two synthetic zeolite-filled adsorbers, which operate in cycles. Dry air is purified from mechanical impurities in the filter. The air is heated by heater, which consists of 3 heating elements and supplied to transformer tank.
The unit can be operated in three operation modes:
air drying and heating mode
adsorbent regeneration (the unit filled with) mode – (regeneration of technical specifications of damp synthetic zeolite by means of hot air heating up to the temperature of 380 – 400 °С).
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