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Bar-type off-circuit tap-changer

A tap changer and excitation technology, applied in electrical switches, contacts, transformers, etc., can solve problems such as excessive switch operating torque, and achieve the effects of reducing switch operating torque, small lead bending radius, and compact structure

Active Publication Date: 2016-09-14
WUHAN TAIPU TRANSFORMER CHANGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synchronous movement and up-and-down synchronous floating of the moving contacts superimpose the maximum torque of the switch, making the operating torque of the switch too large

Method used

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  • Bar-type off-circuit tap-changer
  • Bar-type off-circuit tap-changer
  • Bar-type off-circuit tap-changer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Combine below Attached picture The present invention is further described.

[0021] as shown in the picture 1-2 As shown, this embodiment provides a bar-shaped off-excitation tap-changer, which includes an insulating rod 3 and a support frame 2. An operation positioning device 1 is installed on the support frame 2, and the lower end of the operation positioning device is set Drive the gear, the top of the insulating rod is provided with a rack mobile frame, the rack of the rack mobile frame is meshed with the gear of the operating positioning device 1, so that the rack mobile frame can move back and forth along the insulating rod longitudinally; on the insulating rod 3 Static contacts 4 are arranged at intervals along its length direction, and each phase static contact 4 is equipped with a moving contact assembly, which includes a moving contact bracket 8 and a clip installed in the moving contact bracket For the piece type moving contact, the moving contact bracke...

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Abstract

The invention discloses a bar-type off-circuit tap-changer, which 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 fixed contact is provided with a moving contact assembly; the moving contact assembly comprises a moving contact bracket and a clamping piece type moving contact arranged in the moving contact bracket; the clamping piece type moving contact comprises an upper moving contact and a lower moving contact; the moving contacts are pressed through springs and are bridged between the adjacent phase fixed contacts; and the bar-type off-circuit tap-changer is characterized in that the upper spring and the lower spring in an upper contact cavity and a lower contact cavity of at least one moving contact assembly are asymmetrically arranged. The springs of two oppositely clamped moving contacts are asymmetric in position arrangement; and movement of the moving contacts is not synchronous, so that overlapping of the maximum climbing moment of the moving contacts during gear changing and shifting is prevented; the switch conversion moment is reduced; the operation is relatively portable and reliable; and the bar-type off-circuit tap-changer is more meaningful to the reliability and the convenience of a relatively high current tap-changer.

Description

technical field [0001] The invention relates to 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 group part is composed of a moving contact and a static contact. The moving contact is in the shape of a clip. Connected to the static contact, the upper and lower moving contacts slide on the static contact when the switch shifts gears. The synchronous movement and up-and-down synchronous floating of the movable contact make the maximum torque of the switch superimposed, which makes the operating torque of the switch too large. Wherein, the spring is set on the pin shaft made of metal, and the metal pin shaft easily affects the electric field of the tap changer. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a bar-shaped off-excitation tap changer that can reduce the switching torque and is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/50H01H9/00H01F29/04
CPCH01F29/04H01H1/50H01H9/0016
Inventor 刘刚吴桐
Owner WUHAN TAIPU TRANSFORMER CHANGER
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