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Circuit breaker

A circuit breaker and circuit technology, applied in the direction of protection switch operation/release mechanism, adjustment of protection switch conditions, etc., can solve problems such as poor workability, and achieve the effect of improving efficiency

Pending Publication Date: 2022-01-11
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional circuit breaker as described above, when changing the load of the movable leaf spring, it is necessary to move it by holding the locking portion at the front end of the movable leaf spring with a jig in a narrow space, and there is a need for work. gender difference

Method used

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  • Circuit breaker
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 2

[0060] Figure 13 It is a side sectional view showing the schematic structure of the tripping device of the circuit breaker in Embodiment 2 of this invention. Figure 14 It is a perspective view which shows the spring retainer of the circuit breaker concerning Embodiment 2 of this invention. Figure 15 It is a schematic structural view showing the spring retainer of the circuit breaker concerning Embodiment 2 of this invention, (a) shows a top view, (b) shows a side view.

[0061] In the circuit breaker 100 of Embodiment 1, an example in which a plurality of mounting grooves 3b are formed parallel to the planar portion 3c of the spring holder 3 is shown, but in the circuit breaker 101 of this embodiment, the spring retaining The flat portion 301c of the frame 301 stands upright to form a plurality of installation grooves 301b. The following description will focus on the points of difference from Embodiment 1, and the description of the points of similarity will be appropriat...

Embodiment approach 3

[0068] Figure 16 ~ Figure 26 It is a figure which shows the circuit breaker concerning Embodiment 3 of this invention. Figure 16 is an oblique view showing the tripping device, Figure 17 is the top view of the tripping device, Figure 18 is a side sectional view of the tripping device. In the circuit breaker 102 of the present embodiment, a spring slider 8 is provided instead of the spring holder 3 of the circuit breaker 100 of the first embodiment. The following description will focus on the points of difference from Embodiment 1, and the description of the points of similarity will be appropriately omitted.

[0069] The circuit breaker 102 has: a fixed contact 27 connected to the power supply side terminal 24; a movable contact 23 configured to be able to contact and separate from the fixed contact 27; and a tripping device 60 assembled to the power supply side terminal 24. The conductive member 6 provided between 24 and the load-side terminal 25 is disconnected when ...

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PUM

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Abstract

The invention provides a circuit breaker capable of changing the load of a movable leaf spring without using a clamp for keeping and moving a clamping part at the front end of the movable leaf spring. The circuit breaker (100) is provided with a tripping device (40) for driving an opening and closing mechanism part (30) for separating a fixed contact piece (27) and a movable contact piece (23). In the trip device (40), if an overcurrent flows through the conductive member (6), the fixed yoke (41a) is magnetized. The movable piece (1) is attracted by the magnetized fixed yoke (41a) and rotates around the rotating shaft (5) as a fulcrum. In a state in which no overcurrent flows, the movable piece (1) is biased by the movable piece spring (2) in a direction in which the movable piece (1) is pulled away from the fixed yoke (41a). The fixed end (2b) of the movable leaf spring (2) is locked to the spring holder (3). The spring holder (3) is locked to a fixed member (4) to which a fixed yoke (41a) is fixed, in any of a plurality of mounting grooves (3b) arranged in a direction from the power source-side terminal (24) side toward the load-side terminal (25) side.

Description

technical field [0001] The present invention relates to a tripping device of a circuit breaker such as a wiring circuit breaker and an earth leakage circuit breaker. Background technique [0002] A circuit breaker generally has an instantaneous trip characteristic, and requires a function to initiate an instantaneous trip by passing a specified current about 8 to 16 times the rated current. Therefore, a structure in which a movable piece linked with a main contact opening and closing mechanism operates by an electromagnetic force generated when an overcurrent occurs is often used. The operating current of the movable piece can be adjusted by the load of the movable piece spring that urges the movable piece in the direction opposite to the electromagnetic force, but in order to avoid the reorganization of the movable piece spring, it is known to change the position of the fixed end of the spring. A method of increasing or decreasing the spring load. For example, Patent Docu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/74H01H71/10
CPCH01H71/74H01H71/10
Inventor 渡边和昌田川敏成
Owner MITSUBISHI ELECTRIC CORP