After the transformer has been in operation for a period of time, if the electrical indicators of the transformer oil are unqualified due to short circuit or other reasons, it is necessary to filter the oil to improve its purity. The main unqualified reasons are excessive water content and other impurities.
Because the transformer has been filled with oil, and it is usually impossible to pump out all the oil for filtering after all outages, it can only be filtered online.
oil filteration needs an external oil filteration machine and an oil drain
barrel. Put the new oil (the oil that has passed the test and is qualified for
insulation and voltage resistance) into a clean oil drain barrel, and connect
the external oil filteration unit to the oil drain barrel and the transformer
pipeline. As a whole, carry out external circulation online oil filtration).
Transformer oil high-efficiency filtration refers to the use of specific filtering equipment (usually a vacuum transformer oil filteration machine) to completely filter out impurities and moisture in transformer oil to achieve the effect of cleaning new oil. The importance of high-efficiency filtration of transformer oil lies in:
1. To ensure the insulation performance of the oil. Transformer oil is used as an insulating medium, and its insulation performance is its most important performance. The accumulation of impurities in the oil will cause the insulation performance of electrical equipment to decline. When the dielectric strength of the oil does not meet the requirements, breakdown will occur and cause equipment failure.
2. Eliminate moisture in transformer oil. Once the moisture in the transformer oil exceeds the specified standard, it will reduce the insulation performance and dielectric strength of the oil. At the same time, moisture may also cause the oxidation of transformer oil, thereby reducing the oxidation resistance of the oil.
3. Extend the life of the
equipment. Through the high-efficiency filtration of transformer oil, the
impurities and moisture in the transformer oil can be completely filtered out,
which can effectively prolong the service life of the equipment.
filteration machines used for high-efficiency filtration of transformer oil mainly
includes the following types:
vacuum oil filteration machine. The high vacuum transformer oil filter unit is
a device that uses high vacuum and powerful filters to filter impurities and
moisture in transformer oil. The high vacuum can discharge the moisture and air
in the oil, and the powerful filter can filter out the solid particles and
colloidal substances in the oil. The high vacuum oil filteration device has the
advantages of large processing capacity, high efficiency and good processing
oil separator. A centrifugal oil separator is a device that uses centrifugal
force to separate impurities and water from oil. It can separate the solid
particles and water in the oil to achieve the effect of filtration. The
centrifugal oil separator has the advantages of low manufacturing cost, less
space occupation, and strong automatic production capacity.
3. Multi-stage oil filter unit. A multi-stage oil filter is a device that filters
transformer oil in multiple stages, and each stage of filtration can remove a
certain amount of impurities and water. The multi-stage oil filter unit can
guarantee the oil cleanliness and insulation performance to a certain extent,
but the treatment efficiency is low.
short, high-efficiency filtration of transformer oil plays an important role in
maintaining long-term safe operation of equipment and prolonging equipment
life. When performing high-efficiency filtration of transformer oil, it is
necessary to select suitable filtration equipment, and perform regular
maintenance and replacement of filter elements to ensure the effective
operation of the equipment.
More details about transformer oil filteration, please feel free to contact team of PureTech Oil Filtration.
Add：1 Xinmao Road, Beibei district, Chongqing, China