Current-limiting arc-control device of medium-voltage large current DC circuit breaker

A technology of a DC circuit breaker and an arc extinguishing device, which is applied in the field of current limiting, can solve the problems of current limiting, PTC resistance current limiting method and superconducting current limiting method are not mature in industrial application, and can accelerate arc motion and reduce arc stagnation. effect of time

Inactive Publication Date: 2007-07-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the rated capacity of the circuit breaker is increased by the electric repulsion current limiting method, the purpose of current limiting is limited due to the corresponding increase in the mass and inertia of the contact system that restricts the rapidity of the contact action.
[0006] PTC resistance current limiting method and superconducting current limiting method are not yet mature for industrial applications

Method used

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  • Current-limiting arc-control device of medium-voltage large current DC circuit breaker
  • Current-limiting arc-control device of medium-voltage large current DC circuit breaker
  • Current-limiting arc-control device of medium-voltage large current DC circuit breaker

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Embodiment Construction

[0021] Referring to Fig. 1, the current-limiting arc extinguishing device of the medium-voltage high-current DC circuit breaker of the present invention includes the arc extinguishing chamber 3 and the moving contact 9 and the static contact 11 below the arc extinguishing chamber 3, the moving contact 9 and the static contact Under the head 11, there is an insulating medium blocking plate 16, and at both ends of the insulating medium blocking plate 16, there are left cylinder 14 and right cylinder 15; the arc extinguishing chamber 3 is provided with a plurality of arc extinguishing grids 1 arranged mutually, and a plurality of arc extinguishing There is a metal rod 2 in the middle of the grid 1, and a symmetrical arc guide 4 is provided under the arc extinguishing grid 1. The moving contact 9 below the arc extinguishing chamber 3 is connected with the conductive circuit 8 of the incoming line. The contact 11 is connected with the conductive circuit 13 at the outlet end.

[002...

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Abstract

A current limiting and arc distinguishing device of medium voltage large current DC breaker is prepared as setting right and left air cylinders at two ends of insulation media blocking plate, setting multiple arc distinguishing grid plate being arranged to each other in arc distinguishing chamber and arranging metal rod at middle of multiple arc distinguishing grid plate, setting symmetric arc guiding channels under said arc distinguishing grid plates, connecting active contact to conduction loop of wire feeding in end and connecting static contact to conduction loop of wire outgoing end.

Description

technical field [0001] The invention belongs to the current-limiting technology of a DC circuit breaker, and relates to an arc extinguishing device applied to a medium-voltage and high-current DC circuit breaker, in particular to a current-limiting and arc-extinguishing device for a medium-voltage and high-current DC circuit breaker. Background technique [0002] Due to the unique advantages of the DC grid structure, there is a tendency to transition from the traditional low-voltage AC radial network to the AC medium-voltage AC / DC ring network in the field of ship power. Therefore, research on DC power systems and supporting equipment has become a worldwide hotspot. For the DC power grid, the lack of DC circuit breakers makes it one of the important links in the study of DC network protection actions. And with the increase of grid capacity, the large increase in the short-circuit current caused puts forward higher requirements for the current limiting capacity of the DC cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/22H01H33/88H01H33/90H01H33/91
Inventor 荣命哲马强吴翊
Owner XI AN JIAOTONG UNIV
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