Transformer bushing terminal screen wiring protection device for overvoltage test and application method thereof

Abstract

The invention discloses a transformer bushing terminal screen wiring protection device for overvoltage test and an application method thereof, A last-screen wiring protection device for an overvoltaget transformer bushing comprise a last-screen base and a protective bushing of an integral structure made of elastic insulating material, the last screen base is provided with a connecting flange which is connected with each other and keeps insulation and a last screen terminal which is inserted in the connecting flange, the end of the terminal screen terminal is protruded and arranged outside theconnecting flange, one end of the protective sleeve is interference fit sleeved on the outer wall of the connecting flange, and the other end of the protective sleeve is interference fit sleeved on the outer wall of the terminal screen terminal; The application method comprises the following steps of: using the transformer bushing end-screen wiring protection device for overvoltage test to realize gap sealing of the connecting flange and the end-screen wiring post. The invention can solve the insulation and moisture-proof problems of the last screen test wiring of the bushing in the overvoltage test process of the transformer, and ensures the bushing safety and the reliability of the overvoltage test in the test process.

Description

technical field [0001] The invention relates to overvoltage testing equipment for power systems, in particular to a transformer bushing end screen wiring protection device for overvoltage testing and an application method thereof, which is suitable for capacitive bushing ends in the overvoltage testing process of 110kV and above power transformers. Insulation and moisture-proof of screen wiring. Background technique [0002] Various overvoltages generated by the power grid will cause insulation breakdown of electrical equipment, and even damage the equipment in severe cases, seriously threatening the safe operation of the power system. Therefore, it is often necessary to monitor the overvoltage of the power grid. When performing no-load closing overvoltage tests on transformers with voltage levels of 110kV and above, the capacitive bushing of the transformer is often used as the high-voltage arm, and at the same time, a capacitive voltage divider box is connected to the end ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the large number of transformer manufacturers, the structure of the end screen of the bushing of each manufacturer is different, and the end screen is a metal rod structure, and the conventional plastic cloth (bag) wrapping and sealing effect is not good, which makes the connection very easy to get water and damp, especially Continuous rainy weather greatly increases the risk of safe operation of transformer bushings

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