Intelligent circuit breaker

A technology of intelligent circuit breaker and circuit board, which is applied in the direction of protection switch operation/release mechanism, etc., which can solve the problems of circuit breaker device damage, manual operation of circuit breaker, limited application, etc., and achieve power-off protection and automatic switching. Gate, to achieve the effect of remote control

Active Publication Date: 2015-08-12
KEDU ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the prior art has the following problems in actual use: 1. When the circuit breaker in working state (i.e., the moving and static contacts are connected) encounters a sudden power failure of the main circuit, the moving and static contacts are still in the connected state, At this time, if the main circuit suddenly receives a call, the moving and static contacts in the connected state will instantly pass through the current. Generally, the power-on time of the moving and static contacts is about a few milliseconds. The time for whether there is a fault current is about tens or even hundreds of milliseconds, which leads to the blank period of circuit breaker control during the period when there is current in the moving contact and the circuit board judges whether there is a fault current in the circuit breaker. At this time, the current passing between the moving and static contacts is a fault current, so the fault current may quickly damage the internal components of the circuit breaker, and even cause serious safety problems. Therefore, this prior art circuit breaker has great safety Hidden dangers; 2. The circuit breakers in the prior art can only be manually operated on site, the application is limited, and cannot meet the current market requirements for circuit breakers

Method used

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Examples

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Embodiment 1

[0053] Such as Figure 1-5 As shown, this embodiment provides an intelligent circuit breaker, which mainly includes a housing 1, a contact system disposed in the housing 1, an arc extinguishing device 8, an electric operating mechanism and a circuit board.

[0054] Wherein, the contact system includes a movable contact 201 and a static contact 202 that cooperate with each other, and the movable contact 201 has a connected position with the static contact 202 and a disconnected position with the static contact 202 separated. The electric operating mechanism is used to drive the action of the moving contact of the contact system, and the circuit board is used to control the action of the electric operating mechanism.

[0055] When the main circuit is powered off, the circuit board responds to the main circuit’s power off, and automatically drives the electric operating mechanism to move forward, and the electric operating mechanism drives the moving contact 201 to move from its ...

Embodiment 2

[0085] As an alternative implementation of the smart circuit breaker in Embodiment 1, this embodiment provides a smart circuit breaker whose bistable electromagnetic mechanism is a single-coil electromagnetic mechanism, such as Figure 12 The shown includes: a third coil 401, a second moving iron core 402 arranged in the third coil 401 and capable of reciprocating axially along the third coil 401, respectively arranged in the second moving iron core 402 The third static iron core 403 and the fourth static iron core 404 at both axial ends, and the second permanent magnet 405 located on both radial sides of the third coil 401, the second moving iron core 402 has a The first pull-in position of the three static iron cores 403 and the second pull-in position of the fourth static iron core 404; The coil 401 provides a third current to generate a magnetic field force to drive the second moving iron core 402 to the second pull-in position, and the second moving iron core 402 drives t...

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PUM

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Abstract

The invention provides an intelligent circuit breaker. The intelligent circuit breaker comprises a shell, and a contact system, an electric operating mechanism and a circuit board for controlling the action of the electric operating mechanism, wherein the contact system, the electric operating mechanism and the circuit board are arranged in the shell; the contact system comprises a movable contact and a fixed contact in mutual matching, the movable contact is provided with an on-position communicated with the fixed contact and a separation position separated from the fixed contact; the electric operating mechanism is used for driving the movable contact to act; the circuit board is used for driving the electric operating mechanism to act when a main loop of the circuit breaker is in outage so as to drive the movable contact to move to the separation position, the circuit board is used for driving the electric operating mechanism to reversely act when the main loop is repowered so as to drive the movable contact to move to the on-position, and the circuit board can be used for receiving an external signal in the power-on period of the main loop so as to drive the electric operating mechanism to act, and then driving the movable contact to move to the separation position or the on-position.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an intelligent circuit breaker. Background technique [0002] At present, there are various types of circuit breakers with different working principles. One type of circuit breaker uses circuit protection mechanisms such as short-circuit current relays and bimetallic strips and tripping mechanisms that cooperate with these protection mechanisms, and sets the moving contacts on the tripping mechanism, through which the circuit protection mechanism controls the circuit. The corresponding action in the event of overload, overcurrent, short circuit, etc., drives the tripping mechanism to move and then drives the moving contact to separate from the static contact, so as to realize the disconnection protection of the circuit. [0003] The Chinese patent document (authorized announcement number: CN203760401U) previously applied by the applicant discloses an improved circuit br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10
CPCH01H71/10
Inventor 郑春开李子平孙文豪秦智良廖军
Owner KEDU ELECTRIC CO LTD
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