Tap grounding apparatus and transformer bushing with same

Abstract

The present invention discloses a tap grounding apparatus used for a transformer bushing. The transformer bushing comprises a base flange provided with a first mounting hole; the tap grounding apparatus comprises a grounding seat, a grounding post and an insulating seat; the insulating seat is fixed in the first mounting hole; a second mounting hole is formed in the insulating seat; the grounding post is fixed in the second mounting hole; a grounding seat cover is arranged on the first mounting hole and fixedly connected to the base flange; the upper end of the grounding post is detachably connected to the grounding seat; one of the grounding seat and the grounding post is provided with a pin terminal; and the other of the grounding seat and the grounding post is provided with a jack capable of allowing the pin terminal to be inserted and connected. According to the tap grounding apparatus, the grounding reliability can be effectively improved and a poor grounding situation caused by a defect of a grounding connector can be conveniently discovered; and the tap grounding apparatus is simple in structure and low in manufacturing cost. The present invention also discloses a transformer bushing. The transformer bushing is provided with any tap grounding apparatus.

Description

technical field

[0001] The invention relates to a bushing for a power transformer, in particular to an end screen grounding device for a transformer bushing. Background technique

[0002] The transformer bushing is the main insulation device outside the transformer box. The lead-out wire of the transformer winding must pass through the insulating bushing to insulate between the lead-out wires and between the lead-out wire and the transformer shell, and at the same time play the role of fixing the lead-out wire. The capacitive transformer bushing is composed of a capacitor core, a composite jacket, and metal accessories. The outermost layer of the capacitor core is the last screen. The last screen must be grounded during operation to ensure that the field strength of the internal capacitor core is evenly distributed. When the bushing is subjected to a high-voltage test, the end screen should be opened to facilitate the measurement of the insulation performance of the bushin...

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