High Vacuum Transformer Oil Purification Dehydration Plant is to remove the oil in the water and impurities, to improve the electrical strength of oil to protect the paper in the paper insulation, but also to a certain extent, improve the physical and chemical properties of oil.
Power distribution transformers are mostly installed in the open air environment, transformer insulating oil by external impurities, and air contact and the equipment itself running a higher temperature, the quality of the oil gradually deteriorated. After the deformation of the transformer insulating oil will not play the proper insulation, cooling effect. In order to prevent the safe operation caused by deterioration of oil quality is affected, the normal operation of the regular distribution of oil samples for analysis and do filtration treatment by Transformer Vacuum Oil Dehydration Plant. The inspection cycle for chemical monitoring of the distribution of oil is specified for at least 3 years. Conventional inspection items include acid value, water-soluble acid, flash point, breakdown voltage, appearance.
It should be noted that if the equipment is often loaded with a relatively high load, the number of inspections should be increased on the basis of the specified test cycle. If the tested items are significantly close to the controlled limits, the number of tests should be increased. The quality of the running oil varies greatly depending on the degree of aging and the presence of impurities, and is usually not a test item alone as a basis for assessing the state of the oil.
The determination of several major characteristics of a comprehensive analysis of indicators as following
1. Acid Value
The ultra-limit is greater than 0.1 mgKOH / g. There are four possible reasons for exceeding the limit: overload operation; consumption of antioxidants; compensated oil; oil contamination. The acid value exceeds the limit value can take the following measures: the reasons for the investigation, increase the number of tests, the determination of antioxidant content and appropriate addition, the transformer oil regeneration treatment, if the economy can be done for oil change.
2. 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 impurity particles. For the breakdown voltage beyond the limit can take the following measures: to identify the reasons for vacuum filtration treatment, plate and frame pressure oil filter processing or replacement of new oil.
3. Flash Point
The super limit is less than 130 ° C. Or 5 ° C lower than the previous test value. There are two possible reasons for exceeding the limit: the device has a local overheating fault; If the flash point exceeds the limit value, the following measures can be taken: to identify the cause, to eliminate the fault; to vacuum degassing machine, or oil change treatment.
If the appearance of visual oil is opaque, there are visible impurities or suspended solids. Or oil is too deep, the oil appearance is abnormal. Appearance may be due to abnormal: oil contains water, fiber, carbon black and other solids.
The following measures should be taken for oil with unusual appearance:
If the oil is blurred, turbid white, indicating that the oil contains water, should check the water content. If it is found that the oil contains carbon particles, black color, and even coke smell, there may be an internal arc or partial discharge failure, should be combined with other tests, investigate the cause, troubleshooting. If the oil color is dark, and the color of the oil has changed significantly, it should be noted that the aging of the oil is accelerated, can be combined with oil acid value test analysis, or strengthen the transformer oil operating temperature monitoring.
Our DVTP High Vacuum Transformer Oil Purification Plant can improve breakdown voltage, reduce acid value, recover appearance, flash point and insulation performance by dehydration, degassing, removing contaminants, regeneration treatment, etc.