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Overcurrent release device for circuit breaker

A release device and overcurrent technology, which is applied to switches with electric heat and electromagnetic release, protection switch operation/release mechanism, etc., can solve the problems of high cost and poor workability, and achieve low cost and excellent assembly workability Effect

Inactive Publication Date: 2008-01-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Conventional overcurrent release devices for circuit breakers use a structure in which a heater is wound around a bimetal, so there are problems of poor workability and high cost during assembly.

Method used

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  • Overcurrent release device for circuit breaker
  • Overcurrent release device for circuit breaker
  • Overcurrent release device for circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Next, an overcurrent release device for a circuit breaker according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4 .

[0017] 1 is a sectional view showing a closed state of a circuit breaker according to Embodiment 1 of the present invention, FIG. 2 is a sectional view showing an open state of the same circuit breaker, and FIG. 3 is a sectional view showing an overcurrent release device of the same circuit breaker. As an external perspective view, FIG. 4 is a side sectional view showing the overcurrent release device of the same circuit breaker. In addition, in each figure, the same code|symbol represents the same part.

[0018] First, the overall structure of the circuit breaker 100 according to Embodiment 1 of the present invention will be described.

[0019] In Fig. 1 and Fig. 2, 5 and 6 are a pair of fixed contacts, and the fixed contacts 5 and 6 are disposed opposite to each other, and the fixed contacts 5a and 6a are fi...

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PUM

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Abstract

This overcurrent tripping device 40 of a circuit breaker 100 is equipped with: a thermal tripping means operated when a bimetallic strip 45 is deformed by a predetermined amount by a heat value based on a carried current flowing through a circuit and formed so as to actuate a switching mechanism 3; and an electromagnetic tripping means 42 having an electromagnetic coil 42a generating electromagnetic force based on a carried current, and formed so as to be operated when the electromagnetic force exceeds a predetermined value to actuate the switching mechanism 3. In the device, by forming the electromagnetic coil 42a with a low-resistance member for generating a predetermined heat value when the carried current flows therethrough, a heater for heating the bimetallic strip 45 is omitted.

Description

technical field [0001] The present invention relates to a circuit breaker that interrupts the current when an overcurrent flows in the circuit, in particular to an overcurrent release device for a circuit breaker that releases a switching mechanism by detecting the overcurrent. Background technique [0002] The overcurrent release device of a traditional circuit breaker is composed of a bimetal and an electromagnet, and a heater with one end connected to the fixed contact and the other end connected to the upper end of the bimetal is wound on the bimetal, and the lower end of the bimetal The part is supported on the bimetal bracket and is electrically connected with the bimetal bracket. [0003] The electromagnet has a movable iron core inside the electromagnetic coil, one end of the electromagnetic coil is connected to the bimetal bracket, and the other end is connected to the load side terminal. [0004] In the overcurrent release device of the circuit breaker with the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/48H01H71/40
Inventor 勇谷英孝川上兼弘
Owner MITSUBISHI ELECTRIC CORP