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A Static Contact Structure of Off-Excitation Tap-Changer

A tap changer, static contact technology, applied in the direction of inductors, variable inductors, variable transformers, etc., can solve the problems of inconvenient manufacturing process of transformer leads, reduce tip discharge, improve electric field, and reduce overall height Effect

Active Publication Date: 2019-02-15
WUHAN TAIPU TRANSFORMER CHANGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this type of switch is used for voltage regulation at the end of the coil, the lead wire at the end of one phase coil must be connected with the end or head lead wire of the other phase coil. One lead wire is cold-pressed. At this time, one more lead wire needs to be separated from the end lead of the transformer coil, welded or crimped to the end (or head) static contact, and then connected to another phase coil or led to the bushing , so that there is one more welding or crimping process step for the connection between the static contact at the end and the lead wire, which makes the manufacturing process of the transformer lead wire inconvenient

Method used

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  • A Static Contact Structure of Off-Excitation Tap-Changer
  • A Static Contact Structure of Off-Excitation Tap-Changer
  • A Static Contact Structure of Off-Excitation Tap-Changer

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the drawings.

[0024] Such as Figure 1-6 As shown, this embodiment provides a three-phase five-speed non-excitation voltage regulating tap switch static contact structure, which includes a disc-shaped or bar-shaped switch body 1 on which a three-phase static contact is provided. The relative static contacts include 5 first static contacts 2( Figure 7 2-6 heads) and 1 second static contact 5 ( Figure 7 Middle 7), the contact end of each static contact extends into the inner cavity of the switch body to be configured with the movable contact, the terminal extends out of the switch body, and the second static contact 5 is located at each static contact Lead holes are set at the head or end of each static contact. The lead hole 4 of the second static contact is located outside the switch body, and the hole diameter of the lead hole 4 is larger than the hole diameter of the lead hole 3 of the first s...

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Abstract

The invention discloses a fixed contact structure for a non-excitation tap switch. The fixed contact structure comprises a disc-shaped or strip-shaped switch body; at least one phase of fixed contacts is arranged on the switch body; each phase of fixed contacts comprises multiple first fixed contacts and a second fixed contact; the contact ends of various fixed contacts stretch into the cavity of the switch body and are configured with movable contacts; the wiring ends extend out of the switch body; the wiring ends of various fixed contacts are each provided with a lead hole; the aperture of the lead hole of the second fixed contact is greater than that of the lead holes of the first fixed contacts; the lead holes of the first fixed contacts are used for connecting the lead of this phase of coil; and the lead hole of the second fixed contact is used for sleeving the lead of this phase of coil and this phase of output lead. The aperture of the lead hole of the second fixed contact is greater than that of the leads holes of the first fixed contacts; two leads are connected and in cold press joint; another welding or press joint process is unnecessary; and thus, the processing technique becomes simple.

Description

Technical field [0001] The invention relates to a static contact structure of a non-excitation tap changer. Background technique [0002] There are two types of non-excitation tap changers for distribution transformers: disc structure and strip structure. Most of the static contact terminals are tubular structures, which are connected to the tap lead of the transformer by cold crimping, and the lead diameter of each terminal is the same. , And are respectively connected with a tap lead, simple structure, convenient and reliable to use. However, when this type of switch is used to adjust the voltage at the end of the coil, often the end lead of one phase coil must be connected to the end or head lead of the other phase coil. However, since the diameter of each static contact lead is the same, it can only be connected to one phase. One lead is cold crimped. At this time, one more lead needs to be separated from the end lead of the transformer coil, and the end (or head) static con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/56H01F29/02
CPCH01F29/02H01H1/56
Inventor 刘刚
Owner WUHAN TAIPU TRANSFORMER CHANGER
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