Arrester of bolt box wall

Abstract

An arrester of a bolt box wall comprises a support and an insulation hoop plate, wherein the insulation hoop plate is connected with the support by a fastening body, the insulation hoop plate is of anarch structure of which a middle part is shown in plane and two ends are shown in arc surfaces, plate-shaped wings are arranged at two ends of the arch-shaped structure insulation hoop plate, throughholes are formed in the wings at the two ends and are used for connecting a fastening piece, the insulation hoop plate sleeves an outer side of a branching lead and is connected with the support by the fastening piece. The arch insulation plate can be attached onto a cable very well, so that the branching lead is more reliable to fix; the plate-shaped insulation hoop plate is simple in fabrication process, and a potential risk that bubbles easily exist in an original plate-shaped lamination paperboard is prevented; and the installation size is small, the distance between a phenolic screw rodand an oil box wall is greatly reduced, and the discharging risk caused by excessively near distance between a bolt and the box wall is eliminated.

Description

technical field [0001] The invention relates to a clamp used in a transformer, in particular to an arrester for clamping a tap bolt box wall of a transformer. Background technique [0002] In the transformer structure, the traditional clamps for clamping high-voltage tap leads are generally made of block-shaped laminated cardboard, because the thickness of the laminated cardboard must be The diameter of the cable is larger than that of the tap lead, and then a groove is dug out at the position of the tap lead to buckle the tap lead, which is a waste of material, and the thicker laminated cardboard is slightly improper in the process of processing This will cause the fixture to form tiny air bubbles, which is a hidden danger of partial discharge; in addition, the block-shaped laminated cardboard itself is relatively thick, and it needs to be fixed with insulating bolts and nuts during installation, which also makes the tap lead The already limited space between the cable and...

AI Technical Summary

Problems solved by technology

[0002] In the transformer structure, the traditional clamps for clamping high-voltage tap leads are generally made of block-shaped laminated cardboard, because the thickness of the laminated cardboard must be The diameter of the cable is larger than that of the tap lead, and then a groove is dug out at the position of the tap lead to buckle the tap lead, which is a waste of material, and the thicker laminated cardboard is slightly improper in the process of processing This will cause the fixture to form tiny air bubbles, which is a hidden danger of partial discharge; in addition, the block-shaped laminated cardboard itself is relatively thick, and it needs to be fixed with insulating bolts and nuts during installation, which also makes the tap lead The already limited space between the cable and the box wall is even more insufficient; and the two ends of the laminated cardboard of this structure are thicker, the elasticity is poor, and the thinner part in the middle is easy to crack, which affects the effect of fixing the tap lead.

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