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Selective protection circuit breaker

A protection circuit breaker, selective technology, applied in the direction of circuit breaker components, protection switches, emergency protection devices, etc., can solve the problem of design effect changes

Active Publication Date: 2011-01-26
SHANGHAI NOARK ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, every point of adjustment in the structural layout will lead to changes in the overall design effect

Method used

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Experimental program
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Effect test

Embodiment Construction

[0020] Attached below Figure 1-4 The illustrated embodiment further describes the technical solution and specific implementation of the selective protection circuit breaker of the present invention.

[0021] The selective protective circuit breaker of the present invention can be implemented in various ways, not limited to the accompanying drawings and the description of the following specific embodiments.

[0022] Such as Figures 1 to 3As shown, the casing 8 of the selective protection circuit breaker of the present invention includes an operating mechanism 1, an electromagnetic system 2, a main contact device 3, an auxiliary contact 4, a first bimetal 5, a second bimetal 6, a limiting Flow resistance 7, first wiring device 81, second wiring device 82. The main circuit is composed of the first wiring device 81, the first bimetal strip 5, the main contact device 3, the electromagnetic system 2, and the second wiring device 82 in series, and the branch circuit is composed o...

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Abstract

The invention discloses a selective protection circuit breaker. A main circuit consists of a first wire connection device, a first bimetallic strip, a main contact, an electromagnetic system and a second wire connection device which are connected in series; a branch circuit consists of an auxiliary contact, a current-limiting resistor and a second bimetallic strip which are connected in series; and two ends of the branch circuit are connected in parallel to two sides of a main contact device. An operating mechanism is arranged on the middle upper part of a shell; an auxiliary contact device is arranged on the lower left part of the operating mechanism; the main contact device is arranged on the middle lower part of the shell; the electromagnetic system is arranged on the upper right part of the shell; the first and second bimetallic strips are arranged on the left part of the shell; and the current-limiting resistor is arranged on the upper left part of the shell. The selective protection circuit breaker also comprises a first clapboard and a second clapboard for dividing the shell into a layer A space and a layer B space in the thickness direction; first and second arc extinguishchambers are formed respectively in the layer A space; and the first and second bimetallic strips and an electromagnetic push rod of the electromagnetic system are arranged in the layer B space. The circuit breaker has the advantages of reasonable and compact structural layout, convenient assembly and debugging, high braking capacity and high reliability.

Description

technical field [0001] The invention relates to a small circuit breaker in a terminal power distribution system, in particular to a selective protection circuit breaker with overload long-delay, short-circuit short-delay and short-circuit instantaneous tripping protection performances, which is suitable for operation in actual power grids The circuit, lighting and electrical equipment of public, commercial buildings or residential buildings are equally divided, closed, overloaded and short-circuited. In the case of tripping, the upper level circuit breaker can also trip in time. Background technique [0002] At present, with the increase in the types and quantities of electrical equipment and the degree of automation in industrial, commercial and household buildings, the demand for miniature circuit breakers has increased rapidly, and at the same time, the coordination and cooperation of overcurrent protection devices for multiple upper and lower miniature circuit breakers ...

Claims

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Application Information

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IPC IPC(8): H01H71/00H01H71/40H01H73/18H01H71/46
Inventor 严鹏斌段育明
Owner SHANGHAI NOARK ELECTRIC
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