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The Purpose of Vacuum Transformer Oil Purification Plant -Acore
June 10,2019.
The purpose of Vacuum Transformer Oil Purification Plant is to remove moisture and impurities in the oil, improve the electric strength of the oil, protect the paper insulation in the oil, and improve the physical and chemical properties of the oil to some extent.
Most of the distribution power transformers are installed in an open environment. The insulating oil (transformer oil) is affected by external impurities, air contact and the high operating temperature of the equipment itself, which makes the quality of the oil gradually deteriorate. The deteriorated insulating oil (transformer oil) will not respond
Some insulation and cooling effects. In order to prevent the safe operation caused by the deterioration of oil quality, the normal oil distribution periodic oil sampling should be analyzed and analyzed, and the oil should be treated accordingly according to the analysis results. Inspection cycle of chemical operation supervision of distribution operation oil
It is prescribed for at least 3 years. Routine inspection items include acid value, water soluble acid, flash point, breakdown voltage, and external appearance.
It should be noted that if the equipment is often loaded with high load, the number of inspections should be increased on the basis of the specified test period; if some indicators of the tested items are close to the controlled limit values, the number of inspections should also be increased; The quality of the running oil is old
The degree of change and the conditions of impurities and other changes vary greatly. Usually, a single test item cannot be used as a basis for evaluating the oil quality. A comprehensive analysis should be based on several key characteristics measured.
1. acid value
Its super limit value is greater than 0.1 mg KOH / g. There are four possible reasons for exceeding the limit: overload operation; consumption of antioxidants; mistaken oil; oil contamination. For the acid value exceeding the limit value, the following countermeasures can be taken: investigating the cause, increasing the number of tests, and measuring
Determine the antioxidant content and add it appropriately to carry out the regeneration treatment of the transformer oil. If the economy is reasonable, it can be changed.
2. water soluble acid value
Its super limit is less than 4.2. There are two possible reasons for exceeding the limit: oil aging; oil is contaminated. For the water-soluble acid to exceed the limit value, the following measures can be taken: increase the number of tests and compare the cause with the acid value. Perform oil regeneration treatment, if
Transformer Oil Filtration and Dehydration is very suitable method to change oil property.
3. breakdown voltage
Its super limit is less than 20KV. There are two possible reasons for exceeding the limit: the water content in the oil is too large; the oil is contaminated with foreign particles. The following countermeasures can be taken for the breakdown voltage to exceed the limit value: the cause is identified, the vacuum oil treatment is performed, and the plate and frame pressure filter is applied.
4. flash point
Its super limit is less than 130 °C. Or it is 5 °C lower than the previous test value. There are two possible reasons for exceeding the limit: the device has a local overheating fault; the wrong oil is added. The following countermeasures can be taken for the flash point to exceed the limit value: find out the cause and eliminate the fault;
The Vacuum Oil Purifier can do degassing, dehydration and purification, which can renew the old oil.
5, external appearance
If the visual inspection oil is opaque, there are visible impurities or suspended solids. Or if the oil color is too dark, the oil looks abnormal. Possible causes of abnormal appearance are: oil containing water, fiber, carbon black and other solids. The following countermeasures should be taken for oils with abnormal appearance:
If the oil is illegible, turbid and whitish, indicating that the oil contains water, the water content should be checked. If the oil is found to contain carbon particles, the oil color is black, and even the burnt smell, there may be internal arc or partial discharge failure, and should be combined with other tests to investigate the cause.
Troubleshooting. If the oil color is dark and the color of the oil changes significantly, attention should be paid to whether the aging of the oil is accelerated. It can be combined with the acid value test of the oil or the monitoring of the operating temperature of the transformer oil.
Transformer oil varies widely, and usually cannot be used as a basis for evaluating oil quality by a single test item. A comprehensive analysis should be based on several key characteristics measured. So after filtration process by Vacuum transformer Oil Purification Plant, user can use test equipment to measuring basic property of transformer oil, such as water content, acid value, dielectric strength, gas content, flash point, etc.
Most of the distribution power transformers are installed in an open environment. The insulating oil (transformer oil) is affected by external impurities, air contact and the high operating temperature of the equipment itself, which makes the quality of the oil gradually deteriorate. The deteriorated insulating oil (transformer oil) will not respond
Some insulation and cooling effects. In order to prevent the safe operation caused by the deterioration of oil quality, the normal oil distribution periodic oil sampling should be analyzed and analyzed, and the oil should be treated accordingly according to the analysis results. Inspection cycle of chemical operation supervision of distribution operation oil
It is prescribed for at least 3 years. Routine inspection items include acid value, water soluble acid, flash point, breakdown voltage, and external appearance.
It should be noted that if the equipment is often loaded with high load, the number of inspections should be increased on the basis of the specified test period; if some indicators of the tested items are close to the controlled limit values, the number of inspections should also be increased; The quality of the running oil is old
The degree of change and the conditions of impurities and other changes vary greatly. Usually, a single test item cannot be used as a basis for evaluating the oil quality. A comprehensive analysis should be based on several key characteristics measured.
1. acid value
Its super limit value is greater than 0.1 mg KOH / g. There are four possible reasons for exceeding the limit: overload operation; consumption of antioxidants; mistaken oil; oil contamination. For the acid value exceeding the limit value, the following countermeasures can be taken: investigating the cause, increasing the number of tests, and measuring
Determine the antioxidant content and add it appropriately to carry out the regeneration treatment of the transformer oil. If the economy is reasonable, it can be changed.
2. water soluble acid value
Its super limit is less than 4.2. There are two possible reasons for exceeding the limit: oil aging; oil is contaminated. For the water-soluble acid to exceed the limit value, the following measures can be taken: increase the number of tests and compare the cause with the acid value. Perform oil regeneration treatment, if
Transformer Oil Filtration and Dehydration is very suitable method to change oil property.
3. breakdown voltage
Its super limit is less than 20KV. There are two possible reasons for exceeding the limit: the water content in the oil is too large; the oil is contaminated with foreign particles. The following countermeasures can be taken for the breakdown voltage to exceed the limit value: the cause is identified, the vacuum oil treatment is performed, and the plate and frame pressure filter is applied.
4. flash point
Its super limit is less than 130 °C. Or it is 5 °C lower than the previous test value. There are two possible reasons for exceeding the limit: the device has a local overheating fault; the wrong oil is added. The following countermeasures can be taken for the flash point to exceed the limit value: find out the cause and eliminate the fault;
The Vacuum Oil Purifier can do degassing, dehydration and purification, which can renew the old oil.
5, external appearance
If the visual inspection oil is opaque, there are visible impurities or suspended solids. Or if the oil color is too dark, the oil looks abnormal. Possible causes of abnormal appearance are: oil containing water, fiber, carbon black and other solids. The following countermeasures should be taken for oils with abnormal appearance:
If the oil is illegible, turbid and whitish, indicating that the oil contains water, the water content should be checked. If the oil is found to contain carbon particles, the oil color is black, and even the burnt smell, there may be internal arc or partial discharge failure, and should be combined with other tests to investigate the cause.
Troubleshooting. If the oil color is dark and the color of the oil changes significantly, attention should be paid to whether the aging of the oil is accelerated. It can be combined with the acid value test of the oil or the monitoring of the operating temperature of the transformer oil.
Transformer oil varies widely, and usually cannot be used as a basis for evaluating oil quality by a single test item. A comprehensive analysis should be based on several key characteristics measured. So after filtration process by Vacuum transformer Oil Purification Plant, user can use test equipment to measuring basic property of transformer oil, such as water content, acid value, dielectric strength, gas content, flash point, etc.
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