Should we heat or filter the transformer oil before use(Fresh oil).If yes, why ?Can anybody clearout this.
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Yes, because of moisture content in new oil.
Depending on voltage in transformers in use you need to maintain a low water content to prevent a low breakpoint.
Filtering new oil with water absorbing filter element is highly recommended.
Depending on voltage in transformers in use you need to maintain a low water content to prevent a low breakpoint.
Filtering new oil with water absorbing filter element is highly recommended.
yes any oil can contain particles coming from
production process, transportation , storage, environnement...
based on my experience some time the amount of thoses particles is important.
REGARDS
production process, transportation , storage, environnement...
based on my experience some time the amount of thoses particles is important.
REGARDS
K Menon,
Given a choice, filteration is a better option. Heating is not cost efective and requires elaborate equipment.
Most transformer units in UK depend on mobile equipment. The filteration vans are driven up to the transformer and the oil continously filtered till acceptable levels are reached.
Hussam Adeni
Given a choice, filteration is a better option. Heating is not cost efective and requires elaborate equipment.
Most transformer units in UK depend on mobile equipment. The filteration vans are driven up to the transformer and the oil continously filtered till acceptable levels are reached.
Hussam Adeni
Thanks to Mr Adeni and others,
Generally what is the recommended drain out period for transformer oil.What are the acceptable limits for different parameters.Expecting your kind reply.
Generally what is the recommended drain out period for transformer oil.What are the acceptable limits for different parameters.Expecting your kind reply.
With respect to life of Transformer oils, I would like to use the term, "life of transformer." And change would be required if contaminated with air, (dust) or moisture.
Current Transformer oils are highly napthenic in nature. (Please note most other lubricants should be Paraffinic in nature.) Nynas is the top name in Transformer oil base stocks.
Transformer oils have a very long life, mainly as they do very little work as compared to other lubricants like engine oils. Transformer oils are generally straight minerial highly napthenic base stocks. The main role is cooling the transformer and then quickly dissipating the heat to the atmosphere. One will observe large number of fins in the design of a typical transformer, this increases surface area for dissipating heat.
The critical factor in a transformer oil is the die electric constant. Moisture, contamination affects the die electric values. After a round of "cleaning" and removal of moisture, the oil generally reverts to its original values. Consequently, it can be repeatedly cleaned, dehydrated and used for many years.
Hussam Adeni
Current Transformer oils are highly napthenic in nature. (Please note most other lubricants should be Paraffinic in nature.) Nynas is the top name in Transformer oil base stocks.
Transformer oils have a very long life, mainly as they do very little work as compared to other lubricants like engine oils. Transformer oils are generally straight minerial highly napthenic base stocks. The main role is cooling the transformer and then quickly dissipating the heat to the atmosphere. One will observe large number of fins in the design of a typical transformer, this increases surface area for dissipating heat.
The critical factor in a transformer oil is the die electric constant. Moisture, contamination affects the die electric values. After a round of "cleaning" and removal of moisture, the oil generally reverts to its original values. Consequently, it can be repeatedly cleaned, dehydrated and used for many years.
Hussam Adeni
quote:Originally posted by KRISHNAKUMAR MENON:
Should we heat or filter the transformer oil before use(Fresh oil).If yes, why ?Can anybody clearout this.
Transformer oil (Dielectric Fluid) must be extremly clean and must always be tested prior to pumping into transformers. Essential tests and specification are: ASTM D-1816 =>30 kV and Dissolved water as determined by Karl Fisher Titration of <30 ppm H2O as recieved or in small xfmrs. Large power xfmrs, 10 ppm of H2O is highly suggested.
If your fluid fails either of these parameter then the fluid must be filter with special filters that are design for transformer oils.
