In order to meet the requirements of 500kV or higher transformers, Transformer Oil Purification Plant is mainly used for oil-filled electrical equipment. The market demand of transformer oil purification treatment for ultra-voltage oil filling equipment. The new transformer oil injected in the stage of infrastructure installation or the new transformer oil replaced after equipment maintenance must be based on the secondary transformer oil Purification Plant. The development of high-quality transformer oil purification machine, the main removal of water, impurities and efficient three-stage transformer oil purification plant hydrogen gas, acetylene, methane, ethane and other gases, improve the flash point, voltage resistance and other transformer oil in the gas dielectric strength. And in the specified time to reach the national standard system overall design of the transformer oil technical indicators. Reduce the filtration time. Improve treatment efficiency Transformer Oil Filtration Machine integrates precision filtration and high efficiency dehydration and degassing. The purification efficiency of Vacuum Transformer Oil Purification Machine, the degree of filter particles and impurities in the oil after comprehensive purification, mainly depends on the level of vacuum degree. Dehydration and degassing are mainly due to the saturated vapor pressure of the oil being much lower than the oil temperature. This is the saturated vapor pressure of water and other gases in ultra-voltage equipment that requires deep dehydration and degassing. It is very important to use transformer oil at a certain temperature and vacuum. Increase the oil temperature appropriately to reduce the viscosity of the oil. It can be downloaded. The water and gases contained in the oil are evaporated through a vacuum pump. The mass transfer process needs to be accelerated to improve the efficiency of purification. But the oil temperature should not be too high. Once the evaporation process is maintained, the following two conditions must be generally controlled below 60 degree. The high does not exceed 80℃. In order to prevent the oil from oxidizing or continuously discharging the water vapor generated by the evaporation of water. The Transformer Oil Filtration Machine maintains a certain vacuum degree in the system, so that the antioxidant volatilization loss in the oil.

With the development of ultra-high voltage power transmission and transformation technology, Vacuum Transformer Oil Filtration Machine at home and abroad to single stage and two stage vacuum system. Transformer oil must be adapted to ultra-voltage conditions. For this, it needs to be equipped. Although there are three vacuum products. But its working vacuum is carried out on the basis of the Transformer Oil Purification Machine with better performance. Ensure the design positioning of 133Pa ultra-voltage equipment. Therefore, the configuration of vacuum equipment is not reasonable. If secondary transformer oil is used, the vacuum degree is far from meeting the high-grade operation requirements of transformer oil for ultra-high voltage equipment, not to mention the test point with the target vacuum value of 133Pa located in the Transformer Oil Purification Plant

The vacuum system adopts three-stage vacuum unit. The motor speed is controlled by a variety of switching instructions for the oil type roots vacuum pump, roots vacuum pump and vacuum separation chamber location. The general arrangement of the Vacuum Transformer Oil Purification Machine is shown in Figure 1. 1- Coarse filter 2- inlet oil pump 3- heater 4- vacuum separation chamber 5- exhaust oil pump 6- Fine filter 7- Roots vacuum pump 8- mechanical vacuum pump 9-ro vacuum pump 10- electric ball valve 11- solenoid valve Figure 1 Overall layout of three-stage transformer oil purification plant Figure 3 Dewatering and degassing system flow chart of three-stage transformer oil filtration machine 1.1 System Structure Design Vacuum Transformer Oil Purification Machine is compact in structure. The system design of three-stage transformer oil filtration machine on the maintenance side should be 1 Points: ① convenient, high vacuum rate, fine filter filtration accuracy 1 micron. Based on the purification effect of the secondary transformer oil filtration machine, improve the efficiency of the vacuum system, and can be used for ultra-voltage equipment transformer oil purification plant. Yes, between the original mechanical vacuum pump and Roots vacuum pump, a transformer body is added to vacuum the roots vacuum pump. To get higher pumping speed and higher vacuum degree. 1.2 Operation control of three-stage transformer oil filtration machine with high processing efficiency. The system flow is controlled by automatic frequency conversion.

Vacuum Transformer Oil Purification Plant has the dewatering efficiency of three independent oil machines and the water in transformer oil in vacuum separation chamber heater are double controlled by the oil temperature fuzzy control device. It changes the traditional 1 speed-dependent single point control of evaporation dissipation to range control.