Guidelines What is ONAF cooling?
Contents
What is ONAF cooling?
Oil Natural Air Forced (ONAF) This method is a cooling technique generally used in power transformers. OFAF are transformers in which oil circulation is conventionally provided and air contact is provided by means of a fan. The heat and kinetic energy of the oil increase with the heat produced by the transformer coil.
What current does the transformer work with?
Transformer is a system that provides electrical energy transfer between two or more circuits by electromagnetic induction. Transformers are used in AC (Alternating Current) circuits, not DC (Direct Current) circuits.
What does hermetic transformer mean?
Hermetic transformer, by adjusting the pressure in the factory environment It is produced in special vacuum chambers in such a way that there is no air gap and does not come into contact with the atmosphere. Therefore, since there is no moisture in the boiler, the deterioration in oil caused by oxidation is minimized.
What does dry type transformer mean?
For transformers whose magnetic circuit and windings are not protected in insulating liquid, dry type transformers called transformer. Dry type transformers are dry and never contain oil. Insulated against external factors and covered with glass fiber reinforced epoxy resin. Dry type transformers operate under atmosphere or in gas.
What are the characteristics of transformers?
Transformers transfer electrical energy from the conductor to the other by means of magnetic flux. The structures of transformers simply consist of a core and two coils. Voltage is applied over one of the coils in the core and magnetic flux is generated.
How to understand hermetic transformer?
The differences between oily type transformer, dry type transformer and hermetic type transformer;
Windings of transformers with hermetic and expansion tanks, which are oil-type transformers, are completely in oil. Hermetic type transformers do not require oil change and maintenance at certain periods. Dry type transformer works in gas or under atmosphere.Why hermetic transformer?
Why does the dry type transformer burn?
Erentürk stated that mineral oils are used for cooling purposes. , “If there is a gas or an arc in such a tank, if there is a pressure increase due to mechanical stress and if your transformer tank explodes, the oil does not spill around as a liquid, it is scattered by burning.
How to care for dry type transformer?
As dry type transformers are produced in IP00 protection class, they only work indoors. Since the windings are open to the outside environment in the epoxy cast resin, the transformer must be purified from water and moisture.
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