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Direct current over-current tripping device

A tripping device, overcurrent technology, applied in emergency protection devices, parts of protection switches, electrical components, etc., can solve the problems of easy malfunction, large size, slow tripping speed, etc., to achieve reliable action, volume Compact, fast tripping effect

Pending Publication Date: 2021-11-30
JIANGSU KAIFAN ELECTRICAL APPLIANCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a DC overcurrent tripping device, which can solve the problems of large volume, slow tripping speed, and prone to malfunction

Method used

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Embodiment Construction

[0029] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0030] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

[0031] Un...

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Abstract

The invention discloses a direct current over-current tripping device which comprises a magnetic conductive frame, a magnetic conductive block, a main circuit, a spring and a spring fixing shaft, wherein the magnetic conductive block is installed in a notch of the magnetic conductive frame in a matched mode, an abutting block is arranged outside the main circuit, the two ends of the spring fixing shaft are connected with the magnetic conductive block and the abutting block respectively, and the spring is arranged on the outer side of the spring fixing shaft in a sleeving mode; the magnetic conductive frame is provided with a magnetic conductive frame left upper end face, a magnetic conductive frame right upper end face, a magnetic conductive frame left lower end face and a magnetic conductive frame right horizontal end face. The magnetic conductive block is provided with a magnetic conductive block left upper end face, a magnetic conductive block right upper end face, a magnetic conductive block left lower end face, a magnetic conductive block right lower end face, a magnetic conductive block left horizontal end face and a magnetic conductive block right horizontal end face. According to the bidirectional overcurrent tripping device, the magnetic conductive frame, the magnetic conductive block, the main circuit, the spring and the spring fixing shaft are matched for operation, the tripping speed is high, the action is reliable, the size is compact, meanwhile, misoperation of the tripping device under the low-current condition is prevented, and the action sensitivity and reliability of the direct-current circuit breaker are greatly improved.

Description

technical field [0001] The invention relates to the field of DC fast circuit breakers, in particular to a DC overcurrent tripping device. Background technique [0002] At present, urban rail transit, especially subway, has become an important means of transportation in cities, and its pollution-free and convenient features are deeply loved by the people. In order to ensure the normal operation and travel comfort of subway vehicles, the high-speed circuit breakers used in subway vehicles are generally DC fast circuit breakers. As the core protection equipment of the DC traction power supply system, the DC fast circuit breaker can quickly cut off the fault current of the circuit, which is an important guarantee for the safe operation of the DC power supply system. Compared with the AC system, because the DC system does not have a natural zero-crossing point, it is more difficult to break the DC system. Therefore, a safe and reliable DC over-current release device is needed to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/24
CPCH01H71/24H01H71/2436
Inventor 韩伟朱忠建邱中军戴罡孟凡非葛飞衣陈晨
Owner JIANGSU KAIFAN ELECTRICAL APPLIANCES
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