It can greatly reduce the content of oil and water in the transformer, so as to greatly enhance the breakdown strength of the transformer oil, that is, the oil gap interval of the body insulation is reduced, resulting in a significant reduction in the planning cost of the transformer.

Due to vacuum oil filling, the gas content in the oil tank is very small, so the probability of the action of the pressure relief valve and gas relay is reduced, which ensures the normal operation of the transformer in the power grid. For the vacuum oil filling of the transformer, the oil temperature shall not be lower than 10 degrees above zero, and the time of oil filling demand shall not be less than 6 hours. After the oil filling is completed, it is required to adhere to 2 hours, then sweep the vacuum inside, add oil slowly, reach the surface line position, and let it stand for two hours.

The transformer of the new equipment needs to check the core of the lifting core and lifting cover to avoid the appearance of dirt and stolen goods that may appear in the internal components of the core, the interior of the oil tank and the interior of the pipeline. Once the demand is found, it shall be cleaned in time. It is not necessary to check the lifting center.

When it is found during the core inspection of the transformer that the temperature is lower than 10 degrees above zero, it needs to be heated for 12 hours to ensure that the core temperature measured at the upper iron yoke will not be lower than 20 degrees above zero.

When the air temperature around the transformer is lower than or equal to the core temperature, we need to uncover it. When the air temperature around the transformer is higher than the core temperature, we need to transfer the heat of the transformer to the core so that the air temperature around the core can not be higher than about 10 degrees above zero. Check the core of the transformer. We try our best to operate indoors, and try to keep it dry and clean to avoid rain, snow and dust. If we work outdoors due to the working environment, we need to be careful to avoid dust and rain falling on the transformer, especially when looking at the transformer above 110KV, we need to establish a temporary work shed or equipment tent.

Vacuum oiling equipment: vacuum oiling of 220kV and above transformers and reactors; Vacuum oiling should be adopted for 110kV. The detailed method is to vacuum at a uniform speed. After reaching the specified vacuum degree and connecting for 2h, start to inject oil into the transformer oil tank. The vacuum shall be connected in the whole process of oil injection, and the oil injection temperature should be slightly higher than the body temperature. Inject oil into the transformer at the speed of 3 ~ 5t / h, restrain it when it is about 200mm away from the top of the tank, and continuously vacuum. Connection time: 110kV shall not be less than 2H; 220kV shall not be less than 4H. When vacuumizing the transformer, carefully monitor the elastic deformation of the oil tank, and its value shall not exceed twice the wall thickness. The allowable value of transformer vacuum pumping is: the capacity of 35kV transformer is 4000 ~ 31500kVA and does not exceed 0.051mpa; The capacity of 110kV transformer shall not exceed 0.051mpa at 16000kva and below, and the capacity of 110kV transformer shall not exceed 0.051mpa at 20000kva and above; 220kV ~ 330kV transformer shall not span 0.101MPa.

Psglj series light fine filters are mainly used for super fine filtration of solid impurities such as engine oil, smooth oil and insulating oil, especially for high viscosity oil that cannot be filtered by general oil filters. It is a new generation of plate and frame pressure filter. For the occasion where only mechanical impurities need to be filtered, the machine is more flexible, convenient, low cost and high precision than the vacuum oil filter. It is more useful and has a long service life than the general pressure filter. It can reduce the consistency under constant temperature heating without replacing the filter paper. The filtering precision is high and stable. Therefore, JL series light fine filter is widely used in electric power, manufacturing, car, railway, exercise, steel rolling, aviation, industry and mining. It can deeply filter hydraulic oil, turbine oil, mechanical oil, tightening oil, spindle oil, insulating oil and all liquid oil with smooth function, but it shall not filter alcohol, gasoline and other non smooth and flammable liquids.

The primary function of electrical insulating oil is cooling and insulation. It also has the function of eliminating the arc when the circuit is blocked. Under the action of heat and electric field, transformer oil is gradually oxidized in contact with oxygen to form various oxides, alcohols, aldehydes and acids, forming insoluble colloids and oil sludge. These acidic substances reduce the insulation function of the transformer, so the transformer oil is filtered. And also do exhaust treatment. Because the understanding of gas affects the insulation function of insulating oil. Transformer insulating oil can be filtered by dzj-l vacuum oil filter

Attention should be paid to several links, disassembly, cleaning, inspection and installation in the repair of vacuum oiling equipment. It is important that vacuum equipment, large or small, be attributed to fine mechanical equipment.

The manufacturer of vacuum oiling equipment explained that the disassembly should follow the principle of handling with care, and should not be fooled. It must not be knocked with a sledgehammer; Clean the parts when cleaning, so as to find problems and dangers; Vacuum pump products are quite different from general mechanical products. General mechanical products are mostly chamfered and chamfered, while the edge angle of vacuum pump is clear, which is easy to hurt hands. You should pay more attention and keep in mind. Inspection is a full and accurate work. Don't lose every detail, let alone have a fluke mentality.

There is a device that has been stored for 4 years. After finishing the routine sorting operation, the user connects the pipeline in a conventional way and initially vacuumizes. However, it can not meet the factory standard. Everything is checked. That is, a vacuum hose for gas supply was not checked. At that time, it was thought that the vacuum hose would not leak. On the contrary, the problem lies in this vacuum hose.

In addition, whether the vacuum pump parts are cleaned with gasoline or other solvents, they must wait until the gasoline or solvent volatilizes before the installation. If the vacuum pump oil is mixed with other oils, solvents or water, its function will be damaged and the functional goal of the vacuum pump will be affected. The rubber ring shall be cleaned and carefully checked for defects, such as cracks. And whether the standard is correct. Pay special attention to those adjacent to the standard diameter, such as 3.1 mm and 3 mm; The wrong standard of 5.7 mm and 6 mm will affect the sealing.

For rubber rings with heating orientation, replace them every time they are disassembled and cleaned, such as each interface of oil booster pump. When installing the pump, the pump parts need to be handled with care; Tighten the screws evenly and tighten them diagonally. Dynamic seal is multi-purpose shaft seal. When installing the shaft seal, be careful. First check whether the shaft seal has defects, whether the sealing surface is flat and how elastic the shaft seal spring is.