On-load voltage regulation switch special for power distribution transformer

Abstract

The invention discloses an on-load voltage regulation switch special for a power distribution transformer. The switch comprises a stepping motor, a gearbox, a ball screw, a linear guide rail, a time sequence rack, an insulation support, a connection piece, a bolt type needle bearing, a selective switch assembly and a changeover switch assembly. By the on-load voltage regulation switch, the problem that the on-load voltage regulation switch of the power distribution transformer in the prior art is needed to be periodically maintained during achieving on-load voltage regulation is solved, and the problems of complicated switch and high cost of an on-load tap switch in the prior art are simultaneously solved; by integrated connection of a ball nut of the ball screw, the linear guide and the time sequence rack to drive the selective switch assembly and the changeover switch assembly, the structure is simplified, and the cost is reduced; on the basis that the shape and the volume of the power distribution transformer are not changed, frequent voltage adjustment of the power distribution transformer under a load condition is achieved, the power supply voltage is stabilized, and the loss is reduced; and meanwhile, the lifetime cycle of the on-load voltage regulation switch is equivalent to the lifetime cycle of a transformer body of the power distribution transformer, maintenance is not needed within lifetime period of the on-load voltage regulation switch, and the on-load voltage regulation reliability of the power distribution transformer is improved.

Description

technical field [0001] The device relates to the technical field of electric power products, in particular to an on-load voltage regulating switch dedicated to distribution transformers. Background technique [0002] Distribution transformers are the last stage of the power supply network. They are used in various fields of the national economy and the people's livelihood, and are distributed in every corner of the city and the countryside, with a large number. The current distribution transformers are all non-excitation voltage regulation methods. When regulating voltage, it is necessary to cut off the power supply first, then manually adjust the non-excitation voltage regulation switch, and then resume power transmission after adjustment. Since a power outage is required to adjust the voltage, and it cannot be adjusted in time, the distribution transformer in the actual power supply network has no voltage adjustment measures, resulting in a low qualification rate and poor ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a dedicated on-load voltage regulation switch for distribution transformers, which solves the reliability problem of distribution transformers in the prior art to realize on-load voltage regulation, and at the same time solves the problem of on-load voltage regulation in the existing technical solutions. The problem of complicated switch structure and high cost

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