KR200427820Y1 - Circuit Breaker Having Isolation-Device - Google Patents

Abstract

The present invention relates to a circuit breaker having an isolation device, and a circuit breaker for delivering a precise information on the current state of the contact to the user in the event of a short circuit accident or welding between the contacts due to overcurrent.

Wiring circuit breaker according to the present invention for this purpose is a single pole blocking unit for performing an operation for contacting or separating the movable contactor to the fixed contact according to the opening / closing operation of the mechanism portion; A shaft assembly configured to rotate by the operation of the movable contactor; A connecting pin penetrating to couple the monopole blocking portion and the mechanism portion; And a shaft rotating pin penetrating to assemble the shaft assembly to the single pole blocking unit, wherein the wiring breaker comprises: a protrusion through which the opening of the mechanism is controlled and an upper through hole through which the connecting pin passes; And an isolation device forming a lower through hole through which the shaft rotation pin penetrates, wherein the upper through hole extends in the vertical direction to allow the isolation device to move up and down in response to the rotational movement of the shaft assembly. It is formed by molding into a hole shape.

Therefore, according to the present invention, when a welding phenomenon occurs between the contacts inside the wiring breaker, the handle of the wiring breaker performs an operation indicating the state between the contacts so that the user recognizes the state of the breaker and thereby causes a safety accident. There is a preventable effect.

Breaker, Movable Contactor, Fixed Contactor, Contact, Welding

Description

Circuit Breaker Having Isolation Device {Circuit Breaker Having Isolation-Device}

1 is a view showing the configuration of a conventional circuit breaker;

2A and 2B are diagrams for describing an operation process when a normal current flows and a short circuit current flows in the circuit breaker of FIG. 1, respectively;

Figure 3a is a view for explaining the configuration of a circuit breaker in accordance with an embodiment of the present invention,

3B is a view for explaining a structure in which the isolation device according to the embodiment of the present invention is fastened to the circuit breaker of FIG. 3A;

4A to 4C are diagrams for describing an operation process of a circuit breaker having an isolation device according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

302: isolation device 302a: upper through hole

302b: lower through hole 302c: locking projection

304: connecting pin 306: shaft turning pin

308: fixed contact 310: movable contact

312: shaft assembly 314: tube

316: lever

The present invention relates to a circuit breaker with an isolation device. More specifically, the circuit breaker constrains the operation of the handle in case of a short circuit accident or welding between contacts due to an overcurrent, and provides the user with accurate information about the current state of the contact. It relates to a circuit breaker for transmitting.

The circuit breaker is an electrical device that protects the load device and the line by cutting off the circuit when an overload or short circuit occurs in the converter while switching the electric line to an open or closed state by a user's operation.

1 is a view showing the configuration of a conventional circuit breaker, FIGS. 2A and 2B are diagrams for explaining an operation process when a normal current flows and a short circuit current flows through the conventional circuit breaker, respectively.

Referring to FIG. 1, a conventional circuit breaker includes a handle 102 for providing a manipulation means to enable a user to manually operate the circuit breaker in an on position of an energized position or an off position of a circuit breaker. An enclosure 104 that protects the mechanism including the handle, a magnetic core 106 that is assembled inside the enclosure 104 and generates an electromagnetic force against a current flowing through the wiring breaker, and sucked into the magnetic core by the electromagnetic force An armature 108 to be controlled, a cross bar 110 that is controlled and operated according to the armature driving, a trip shooter 112 driven by the crossbar, and a spring to generate a driving force of the trip shooter The trip bar 116 which rotates by the 114 and the trip shooter, and the single pole difference which performs the operation | movement which contacts or isolates a movable contactor to a fixed contactor according to the on / off operation | movement of a mechanism part. It is configured to include a portion (118).

Referring to FIGS. 1, 2A and 2B, the operation of the conventional circuit breaker will be described. As shown in the drawing of FIG. 2A, the conventional circuit breaker is trip trip 112 by the crossbar 110 when a normal current flows. ) Is constrained so that the nail portion of the trip bar 116 remains in the closed position of the breaker.

However, as shown in FIG. 2B, when an instantaneous current such as a short circuit current occurs, an operation process of the circuit breaker includes an electromagnetic force of the magnetic core 106 attracting the armature 108 so that a part of the armature 108 crossbars. By rotating the 110, the engaging portion of the trip shooter 112, which has been restrained on the crossbar 110, is released to release the restraint, and the trip shooter rotated by the elastic force of the spring 114 assembled to the trip shooter 112 ( 112 rotates the nail portion of the trip bar 116, whereby the trip bar 116 performs an operation of tripping the mechanism part by deviating from the closing position of the breaker.

However, such a conventional circuit breaker physically moves the position of the handle 102 from the ON state to the OFF / RESET state even when welding between the movable contacts and the fixed contact in the single pole breaker 118 occurs due to heat or arc. Because of the structure that can be switched, there is a problem that users can not accurately recognize the current contact state.

In order to solve this problem, the present invention provides a circuit breaker with a structure that makes it impossible to move the handle to the OFF / RESET position when welding occurs between the contacts inside the circuit breaker, thereby allowing the user to recognize the exact state of the line and to receive an electric shock. To prevent such accidents.

An object of the present invention, the single-pole blocking portion for performing the operation of contacting or separating the movable contactor to the fixed contactor 104 in accordance with the opening / closing operation of the mechanism; A shaft assembly configured to rotate by the operation of the movable contactor; A connecting pin penetrating to couple the monopole blocking portion and the mechanism portion; And a shaft rotating pin penetrating to assemble the shaft assembly to the single pole blocking unit, wherein the wiring breaker comprises: a protrusion through which the opening of the mechanism is controlled and an upper through hole through which the connecting pin passes; And an isolation device forming a lower through hole through which the shaft rotation pin penetrates, wherein the upper through hole extends in the vertical direction to allow the isolation device to move up and down in response to the rotational movement of the shaft assembly. It can be achieved by providing a circuit breaker with an isolation device, which is molded into a hole shape.

Figure 3a is a view for explaining the configuration of the circuit breaker according to an embodiment of the present invention, Figure 3b is an exploded perspective view for explaining the structure in which the isolation device according to the embodiment of the present invention is fastened to the circuit breaker of Figure 3a. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The circuit breaker according to the present invention has an isolation device 302 for controlling the operation of the handle when welding occurs at the internal contact of the single pole breaker, a connection pin 304 for coupling the isolation device to the mechanism, and the isolation device and the shaft. In addition to the shaft rotation pin 306 for coupling the assembly having the same configuration as the components of the prior art shown in Figures 1 and 2, the isolation device corresponding to the features of the circuit breaker according to the present invention ( 302, the connecting pin 304 and the shaft rotation pin 306 will be described in detail only, and the same components as in the prior art will be omitted in order to avoid duplication. In the prior art and the present invention, the same reference numerals are used for components corresponding to each other.

Accordingly, in the circuit breaker for the present invention, the single-pole breaker may refer to reference numeral 118 of FIG. 1, and the handle of the mechanism may refer to reference numeral 102 of FIG. 1, respectively.

Here, each single pole blocking portion 118 is composed of a structure assembled by the mechanism portion and the connecting pin 304.

In addition, reference numerals 308 and 310 denote the fixed contactor and the movable contactor constituting the single pole blocking portion 118, respectively, and reference numeral 312 denotes a shaft assembly which performs rotational motion by the operation of the mechanism portion.

In particular, the wiring breaker according to the embodiment of the present invention is provided with an isolation device 302 between the single pole blocking portion 118, the isolation device is assembled to enable the vertical movement with the connecting pin connected through the mechanism portion. The upper through hole 302a to be coupled and the lower through hole 302b to be assembled with the shaft rotation pin connected through the shaft assembly are formed.

In addition, the isolation device 302 has a locking projection 302c which prevents the clockwise movement of the handle lever 102a on one end thereof, so that welding occurs at the contact between the fixed contactor and the movable contactor. It serves as an obstacle that prevents the rotation of the lever.

That is, since the upper through hole 302a of the isolation device has a shape in which holes extend upward and downward, the isolation device 302 is moved upward or downward in response to the rotation operation of the shaft assembly 312. The locking projection 302c of the isolation device serves to hinder the clockwise operation of the lever 102a of the mechanism when the isolation device is located in an upward direction. When is located in the downward direction is configured to have a structure that does not affect the operation of the lever.

In addition, the circuit breaker for wiring according to the preferred embodiment of the present invention has a structure in which a tube 314 for preventing left and right microscopic movements of the isolation device 302 is inserted into an outer portion of the isolation device to form a single pin with a connection pin 304. The blocking unit 118 may be assembled and fixed.

4A to 4C are views for explaining an operation process of the circuit breaker having the isolation device according to the present invention.

Hereinafter, operation characteristics of the present invention will be described with reference to FIGS. 4A to 4C.

4A and 4B are views showing a state when the circuit breaker operates normally, and when the wiring breaker rotates the handle 102 of the mechanism in the direction of the arrow to perform the opening or closing operation, it corresponds to the operation of the mechanism. Thus, the shaft assembly 312 rotates in the same direction as the movement direction of the handle, and at this time, the converter is controlled to open or closed by contact or spaced apart operation of the movable contact 310 and the fixed contact 308.

In this case, the isolation device 302 is assembled between each single pole blocking portion 118 by the shaft rotation pin 306 and the connection pin 304, and the shaft assembly 312 is rotated in the counterclockwise direction (transmission closed). In this case, the isolation device 302 moves in the upward direction, and at this time, the rotational direction of the lever 102a of the handle proceeds in a direction opposite to the position of the protrusion of the isolation device, so that the rotational movement of the handle is not hindered.

In addition, when the shaft assembly 312 rotates clockwise (opening), the isolation device 302 can move downward to avoid interference with the mechanism part, so that the handle 102 performs a smooth opening and closing operation. You can do it.

On the other hand, Figure 4c is a view for explaining the operation process when the welding occurs between the fixed contact 308 and the movable contact 310, where the instantaneous current including the short-circuit current is a very short time to the circuit breaker It refers to an abnormal phenomenon in which an arc is generated between the contacts when flowing for a while and melting occurs between the contacts by the arc, leading to a welding state.

As shown in FIG. 4C, when the contactor is welded, when the user rotates the handle 102 of the mechanism clockwise to put the breaker in the off position, the shaft assembly 312 is closed ( the isolation device 302 which is assembled to the shaft rotation pin 306 and moves up and down because it is in an on position) is kept moving upwards, so that the locking projection 302c of the isolation device is moved to the handle lever. It serves as an obstacle that obstructs the clockwise progression operation of 102a.

As a result, the handle 102 is no longer able to proceed to the off position. The position of the handle 102 allows the user to predict the contact state inside the breaker.

On the other hand, the above description is merely illustrative of the technical idea of the present invention, those of ordinary skill in the art will be able to various modifications and variations without departing from the essential characteristics of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when a welding phenomenon occurs between the contacts inside the wiring breaker, the handle of the wiring breaker causes the operation indicating the state between the contacts so that the user recognizes the state of the breaker and thereby causes a safety accident. There is an effect to prevent.

Claims (1)

A single pole blocking unit performing an operation of contacting or separating the movable contactor from the fixed contactor according to the opening / closing operation of the mechanism unit; A shaft assembly configured to rotate by the operation of the movable contactor; A connecting pin penetrating to couple the monopole blocking portion and the mechanism portion; And a shaft rotating pin penetrating to assemble the shaft assembly to the single pole blocking unit. And an isolation device forming a protrusion through which the opening of the mechanism is controlled, an upper through hole through which the connecting pin passes, and a lower through hole through the shaft rotation pin. The upper through hole is a circuit breaker having an isolation device, characterized in that the insulating device is formed in a hole shape extending in the vertical direction so that the vertical movement in response to the rotational movement of the shaft assembly.

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