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Short-circuit delay adjustable apparatus for heavy current frame type DC circuit breaker

A DC circuit breaker and frame type technology, which is applied in the field of short-circuit delay adjustable devices for high-current frame type DC circuit breakers, can solve the problems of the circuit breaker not working normally, reducing the system reliability, and failing to protect the main circuit.

Active Publication Date: 2018-09-04
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electronic release is used to realize the short-circuit short-delay protection function of the circuit breaker, but the operation of the electronic release is easily affected by the external environment, which reduces the reliability of the system.
For example: when the external control power supply is cut off, the circuit breaker cannot work normally; when the main circuit has a short-circuit current, it cannot protect the main circuit

Method used

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  • Short-circuit delay adjustable apparatus for heavy current frame type DC circuit breaker
  • Short-circuit delay adjustable apparatus for heavy current frame type DC circuit breaker
  • Short-circuit delay adjustable apparatus for heavy current frame type DC circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: is a basic embodiment. like Figure 1-5 Shown: An adjustable short-circuit delay device for a large-current frame-type DC circuit breaker, which consists of a short-circuit release A for monitoring the short-circuit current of the main circuit and issuing an action command, and a gear delay for adjusting the delay time B, and a link mechanism C for realizing motion transmission; the short-circuit release A is composed of a moving iron core assembly 1 and a static iron core assembly 2 connected to the circuit breaker frame; as figure 2 , 3 As shown, the moving iron core assembly 1 has a transmission rod 1.1, one end of the transmission rod is connected to the armature 1.2, and the other end is connected to the connecting rod 3.1 of the connecting rod assembly 3; the transmission rod 1.1 is connected to the opposite side of the armature 1.2. With support column 1.3; as figure 1 As shown, a crank arm fixed on the driving gear shaft 4.5 of the connecting r...

Embodiment 2

[0029] Embodiment 2: it is a further embodiment on the basis of embodiment 1. like Figure 4 As shown, the armature 1.2 includes two side splints 1.21 installed on the outside, and the inner sides of the two side splints are respectively the first silicon steel sheet assembly plate 1.22 and the second silicon steel sheet assembly plate 1.24, and the two silicon steel sheet assembly plates The middle is an epoxy board 1.23, and the five boards are stacked and fixed as a whole through rivets 1.25. like figure 1 , 3 As shown, the reaction force spring 1.4 is connected with a setting block 1.5 for adjusting the pretightening force of the reaction force spring so as to realize the adjustment of the setting value of the short-circuit release, and the setting block 1.5 is fixed on the circuit breaker frame 5 . like figure 1 As shown, the delay gear 4.2 is a semi-circular gear, which is matched with the stopper 4.4, and is used to adjust the relative sliding teeth number between t...

Embodiment 3

[0030] Embodiment 3: is the preferred embodiment on the basis of embodiment 2. like figure 1 , 2 , 4, the delay time of the short-circuit delay adjustable device is determined by the time when the block 4.4 slides a tooth relative to the delay gear 4.2, and the delay time of the short-circuit delay adjustable device is selected as 25ms.

[0031]In conjunction with structure of the present invention and operating principle and effect, the present invention is further described as follows:

[0032] Such as figure 2 , 3 As shown, the working process of the short-circuit release system A of the short-circuit delay adjustable device of the present invention is as follows: when the copper bar 2.2 has a short-circuit current flowing through it, the static iron core 2.1 applies electromagnetic attraction to the armature 1.2 on the moving iron core assembly 1, And the greater the short-circuit current flowing through the copper bar 2.2, the greater the electromagnetic attraction. ...

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PUM

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Abstract

The invention provides a short-circuit delay adjustable apparatus for a heavy current frame type DC circuit breaker. The short-circuit delay adjustable apparatus for a heavy current frame type DC circuit breaker is composed of a short-circuit release, a gear delayer, and a linkage mechanism, wherein the short-circuit release is composed of a moving iron core assembly and a static iron core assembly; the gear delayer is composed of a gear drive assembly, including a driving gear, a delay gear, a drive gear, and a stopper; a connecting rod 1 is connected to a connecting rod 2; the connecting rod2 is connected to a connecting rod 3; the connecting rod 3 is connected to a connecting rod 4; the other end of the connecting rod 4 is connected to a tripping shaft; one end, connecting the connecting rod 1, of a drive rod is also connected with a reaction spring; and the short-circuit release, the gear delayer and the linkage mechanism are connected to the circuit breaker frame. The short-circuit delay adjustable apparatus for a heavy current frame type DC circuit breaker provides a new stable solution which does not depend on external power supply for realization of short circuit short delay protection of the circuit breaker, and the short-circuit delay adjustable apparatus has the advantages of simple structure and high reliability.

Description

technical field [0001] The invention relates to a short-circuit delay adjustable device for a large-current frame-type DC circuit breaker, which is a time-delay mechanism for all-mechanical motion transmission and belongs to the technical field of electric appliance control. Background technique [0002] At present, the electronic release is used to realize the short-circuit short-time delay protection function of the circuit breaker, but the operation of the electronic release is easily affected by the external environment, which reduces the reliability of the system. For example: when the external control power supply is cut off, the circuit breaker cannot work normally; when the main circuit has a short-circuit current, it cannot protect the main circuit. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an adjustable short-circuit delay device for a large-current frame-type DC circuit br...

Claims

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Application Information

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IPC IPC(8): H01H71/44H01H71/24
CPCH01H71/2472H01H71/44
Inventor 郝德清汪浩曹鹏飞赵成宏马子文
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST