Fixed contact structure of bar-type off-circuit tap-changer

Abstract

The invention discloses a fixed contact structure of a bar-type off-circuit tap-changer. The fixed contact structure comprises an insulating rod and a support rack, wherein the support rack is provided with an operation positioning device; the insulating rod is provided with fixed contacts along the length direction at intervals; each phase of fixed contact is provided with a moving contact assembly; a moving contact in each moving contact assembly is bridged between each phase of adjacent fixed contacts; each fixed contact comprises a columnar fixed contact body and a columnar wiring terminal; each fixed contact body and the corresponding moving contact arranged in a matching manner; the outer end of each fixed contact body is bent downwards to form the wiring terminal; and each moving contact assembly comprises a moving contact bracket and a moving contact arranged in the moving contact bracket. After each wiring terminal is bent downwards, connection with a lead which is from the lower part of the tap-changer is facilitated; and the lead is bent into a curved form, is connected with the fixed contact, and is not arranged in a manner of bending at 90 degrees, so that the bending radius of the lead is reduced; the space in a transformer occupied by the tap-changer is reduced; and the lead is more beautiful in wire arrangement and is not easy to break.

Description

technical field [0001] The invention relates to a static contact structure of a bar-shaped off-excitation tap changer. Background technique [0002] In the Chinese patent CN201130595Y, a bar-shaped non-excitation tap changer is disclosed. The contact part is composed of a moving contact and a static contact, wherein the moving contact is in the shape of a clip, and the static contact is in the shape of a bar. The two pieces of moving contacts are pressed and straddled on the static contacts through springs, and the upper and lower moving contacts slide on the static contacts when the switch shifts gears. Since the static contact has a bar-shaped columnar structure, the lead wire must be bent at 90 degrees after coming out of the transformer coil to connect to the static contact of the tap changer. The space inside the transformer occupied by the switch is relatively large, thereby increasing the manufacturing cost of the transformer, and at the same time, the arrangement of...

AI Technical Summary

Problems solved by technology

Since the static contact is a bar-shaped columnar structure, the lead wire must be bent at 90 degrees after coming out of the transformer coil to connect with the static contact of the tap changer. The space inside the transformer occupied by the switch is relatively large, which increases the manufacturing cost of the transformer, and the lead wire arrangement is not beautiful enough

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