Transformer high-voltage bushing

Abstract

The invention discloses a transformer high-voltage bushing which comprises a copper cap, a lead connector, a wiring plate, a bolt, a pin and a connecting cap. The lead connector is fixed inside the copper cap through threads. The wiring plate is connected with the copper cap through the connecting cap. The bottom end of the copper cap is fixed to a transformer through bolts. The transformer high-voltage bushing is simple in structure, good in sealing performance and capable of effectively avoiding the phenomenon that the transformer is watered and becomes wet in the operating process.

Description

technical field [0001] The invention relates to the field of transformers, in particular to a transformer high-voltage bushing. Background technique [0002] Insulation accidents caused by water ingress and dampness in power transformers continue to occur, accounting for about 20% of insulation accidents, posing a threat to the safe operation of the power grid. The reasons for water ingress and dampness during the operation of the transformer are: first, the silica gel of the oil conservator respirator does not work, and the moisture in the air enters the transformer through the oil conservator. The probability of this happening is relatively small. Second, the sealing performance of the high-voltage bushing of the transformer is relatively poor, and moisture flows into the interior of the transformer through the top of the high-voltage bushing. The top connection cap of the high-voltage bushing of the transformer is poorly sealed, and moisture enters the winding insulatio...

AI Technical Summary

Problems solved by technology

Second, the sealing performance of the high-voltage bushing of the transformer is relatively poor, and moisture flows into the interior of the transformer through the top of the high-voltage bushing

During the inspection of the bushing, it was found that the top connection cap of the domestic bushing was not well sealed. When the lead wire was blown by a strong wind, the sealing rubber ring would squeeze to one side, and there would be a gap on the other side, which could not prevent rainwater from infiltrating.

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