SF 6 sealing pot protective device and using method for electric high-pressure oil-filling mutual inductor

Abstract

The invention relates to an SF 6 sealing pot protective device for an electric high-pressure oil-filling mutual inductor. The SF 6 sealing pot protective device comprises the electric high-pressure oil-filling mutual inductor, the top of the electric high-pressure oil-filling mutual inductor is connected with a sealing pot, the side face of the sealing pot is provided with an air supplying pot, a ripple air supplying valve is arranged between the air supplying pot and the sealing pot, the middle of the upper surface of the sealing pot is provided with a pressure releasing valve, the upper surface of the sealing pot is provided with an air releasing valve, the air releasing valve is connected with a main pipe, the main pipe is connected with an SF 6 air bottle through a first branch pipe, the main pipe is connected with a vacuum pump through a second branch pipe, the first branch pipe is provided with an air adding valve, the joint of the first branch pipe and the SF 6 air bottle is provided with a pressure reducing valve, and the second branch pipe is provided with a vacuum valve. The contact between air and tidal air and an oil face inside the mutual inductor is separated, and the functions of fire proofing and fire fighting are achieved.

Description

technical field [0001] The invention relates to a protection device for an SF6 sealed tank of an electric high-voltage oil-filled transformer and a method for using it. Background technique [0002] At present, the sealing protection device of the traditional high-voltage oil-filled transformer for electric power is mainly the protection device of the metal corrugated expander or the gland is tightly sealed. To compensate the pressure change caused by the rise and fall of the oil level in the transformer due to the thermal expansion and contraction of the oil inside the transformer, but because the metal corrugated expander is made of stainless steel metal, due to the friction force during stretching and shrinking movements, Jamming phenomenon is easy to occur, resulting in poor rise and fall of the oil level of the transformer, and even a false oil level of the oil-filled transformer. Air contact is also susceptible to moisture. The power high-voltage oil-filled transform...

AI Technical Summary

Problems solved by technology

[0002] At present, the sealing protection device of the traditional high-voltage oil-filled transformer for electric power is mainly the protection device of the metal corrugated expander or the gland is tightly sealed. To compensate the pressure change caused by the rise and fall of the oil level in the transformer due to the thermal expansion and contraction of the oil inside the transformer, but because the metal corrugated expander is made of stainless steel metal, due to the friction force during stretching and shrinking movements, Jamming phenomenon is easy to occur, resulting in poor rise and fall of the oil level of the transformer, and even a false oil level of the oil-filled transformer. Exposure to air is also susceptible to moisture

Power high-voltage oil-filled transformers with glands and tight seals are prone to moisture and accidents in the long-term outdoor exposure to the sun and rain, and are rarely used now.

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