(1) transformer during transportation and storage must be well sealed, in the installation process and operation measures must be taken to prevent the water; in the installation must special attention is higher than that of the oil conservator surface components, such as at the top of the casing, explosion-proof membrane oil pillow top and respiratory sealing should be really good, and the leak test, combined with the annual overhaul, should check the parts of the seal.

(2) the transformer with strong oil circulation should ensure that the connection of the main body and the cooling system is sealed at the time of installation. Gasket should be installed correctly and keep in good condition and manufacturing defects should be deal with, such as cushion of submersible pump, oil inlet valve rod sealing packing, pressure differential relay of the connecting pipe. When changing the rubber pad, the rubber pad material with unknown performance should be sampled for oil resistance test.

(3) the water cooling oil cooler and oil pump should be in accordance with the manufacturer's installation instructions for each station for leak test before installation. Several parallel operation of oil cooler, the best in each submersible pump export installed non-return valve, so as not to spare oil cooler oil flow backward. Operation and backup of the cold oil must ensure that the hydraulic pressure is greater than the. Submersible oil pump inlet valve should be fully open, and use the oil valve to adjust the flow of oil to avoid negative pressure. Operation should be regularly monitored pressure relay and the pressure gauge instructions and water with or without Youhua (each oil cooling device should be installed in the oil slick in the supervision of water drain valve). The measures should be taken to prevent the oil cooler after tube cracking.

(4) explosion proof tube should be connected with the oil pillow or through the respirator and the atmosphere. Regular discharge of water in the lower part of the oil pillow.

(5) the oil seal of the respirator should pay attention to the maintenance of the gas and ensure the smooth flow. Dryer should be kept dry.

(6) 220 thousand kV and above transformer should be to eliminate the bubbles in the coil by vacuum oiling. The 110 thousand volt transformer should actively create conditions for the vacuum oiling.

(7) before the transformer is put into operation, we should pay special attention to the elimination of the internal air, such as the high pressure casing flange, the elevated seat, the dead zone in the pipeline, the top of the cold oil, etc.. Forced oil circulation transformer installed before operation should be start all cooling equipment. Oil circulation for a long time, so that the residual air to escape.

(8) when the oil pillow is charged with oil or charged oil filter, the water in the oil pillow should be put in the first place. Not since the lower part of the transformer oil to prevent air or water, and other debris into the bottom of the coil.

(9) when the signal light gas to timely take gas (even the air) to ascertain the composition and oil sampling for TLC to identify the reasons, troubleshooting.