KR100574424B1 - Circuit breaker - Google Patents

Abstract

The present invention relates to a safety device for a circuit breaker, and more particularly, to protect a user from a safety accident that may occur in a live state during installation and removal work on an external base of a plug-in type circuit breaker. As a safety device for the safety of the present invention relates to a safety device that can restrain the opening and closing mechanism of the circuit breaker in the trip state. In order to achieve the above object, the present invention has an opening and closing mechanism for opening and closing a circuit and a cross bar for operating the opening and closing mechanism in a trip position, and in the circuit breaker for wiring installed on an outer base, the opening and closing mechanism is operated in a trip position. A press trip mechanism movable in a direction to pressurize the crossbar rotationally or to release the pressurization of the crossbar; A support member fixed to the bottom of the circuit breaker and rotatably supported by the support member, the wiring breaker being rotated in one direction when the circuit breaker is installed on the outer base and the other when the wiring breaker is separated from the outer base. A first lever that provides an action force while rotating in a second direction, a spring that provides an elastic force to rotate the other side to the first lever, and one end is connected to the first lever and the other end is pressurized to the pressure trip mechanism. When the first lever is rotated in one direction, the pressure on the pressure trip mechanism is released to release the crossbar, and when the first lever is rotated in the other direction, the pressure bar is pressed to trip the crossbar. A safety mechanism assembly having a second lever for urging to rotate to a position; And a protrusion for protruding in a horizontal direction from the air pressure trip mechanism to receive a pressing force from the second lever. When the circuit breaker is separated from the external base, the opening / closing mechanism is always kept tripped. Protects users from the risk of electric shock.

Pressure trip device, safety device, plug-in base

Description

Circuit Breakers {CIRCUIT BREAKER}

1 is a perspective view of a conventional circuit breaker.

Figure 2 is a plug-in base mounting state diagram of a conventional wiring breaker.

Figure 3 is a state diagram of assembling the safety device of the circuit breaker according to the embodiment of the present invention.

Figure 4 is a safety device and plug-in base coupling of the circuit breaker according to an embodiment of the present invention.

5 is a pressure trip device coupling of the circuit breaker according to the embodiment of the present invention.

Figure 6 is an operation state when the plug-in base mounting of the circuit breaker according to the embodiment of the present invention.

Figure 7 is a state diagram when the plug-in base detachment of the circuit breaker according to an embodiment of the present invention.

8 is a plug-in base mounting state of the circuit breaker according to an embodiment of the present invention.

9 is a plug-in base detachment state diagram of a circuit breaker according to an embodiment of the present invention.

 <Description of the symbols for the main parts of the drawings>

10: single pole blocking unit 20: crossbar

30: pressure trip mechanism 31: protrusion of the pressure trip mechanism

40: enclosure 41: insertion hole

50: Plug-in base 51: Plug-in base protrusion

60: safety mechanism assembly 61: first lever

62: rotation axis 63: second lever

80: opening and closing mechanism

The present invention relates to a pressure trip device for a circuit breaker, and more particularly, in a state in which a circuit breaker is not installed in the plug-in base when the plug-in type circuit breaker is installed and removed, the circuit breaker always trips. The present invention relates to a circuit breaker for preventing a safety accident in advance.

Hereinafter, a conventional circuit breaker will be described in detail.

1 is a side perspective view of a conventional wiring breaker, and FIG. 2 shows a state diagram in which a conventional wiring breaker is mounted on a plug-in base.

1 and 2, a conventional pressure trip device for a circuit breaker is assembled on a single pole breaking unit 1 for controlling the current of each phase and a single pole breaking unit 1, and the circuit breaker is turned on or off. (OFF) Electromagnetic repulsive force between the movable contactor and the fixed contactor in the monopole breaking unit 1 when an accident current such as a short circuit current or ground fault current is generated between the switching mechanism part 8 that controls the operation and the monopole breaking unit 1. The pressure trip mechanism 3 for tripping the opening / closing mechanism part 8 using the pressure of arc gas generated during contact opening by the crossover, and the crossbar 2 for tripping the opening / closing mechanism part 8 by the operation of the pressure trip mechanism 3. ), An enclosure (4) enclosing and securing the single-pole breaking unit (1), and a plug-in base (5) for facilitating installation and removal of the circuit breaker and supporting the circuit breaker. It is configured by.

Referring to FIG. 1, in the conventional circuit breaker, when the normal current flows, the pressure trip mechanism 3 is assembled to the outside of the single-pole breaking unit 1, and thus does not cause any interference to the operation of the crossbar 2. When an accident current flows inside the single-pole breaking unit 1, the pressure trip mechanism 3 displaces due to the arc gas pressure generated therein, causing the crossbar 2 to rotate, thereby causing the opening and closing mechanism 8 to trip. Will be raised.

 However, such a conventional circuit breaker prevents fusion between the contacts by preventing the time delay because the circuit breaker trips the opening / closing mechanism without multi-step mechanism operation when an accident current flows. In order to install the plug-in safety device, separate parts must be installed inside, and the tripping device and the safety device have complicated parts due to interference with the safety device, and the user may need to disassemble the breaker to install the safety device. Done. In addition, even if a separate component is installed, there is a problem in that damage occurs due to the crossbar structure and the long structure of the safety device because the crossbar should have another impact point.

 Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, the object of the present invention is to provide a part as a safety device to the pressure trip device of the function of tripping the opening and closing mechanism by using the arc gas pressure when an accident current occurs. By connecting the external insertion safety device and the internal pressure tripping device without installing separate parts inside, the tripping circuit breaker in the live state and the circuit breaker when the plug-in base is not installed in the plug-in when the plug-in base is removed or tripped The present invention provides a circuit breaker for maintaining a state to prevent a safety accident in advance.

An object of the present invention is to provide a circuit breaker having an opening and closing mechanism for opening and closing a circuit and a crossbar for operating the opening and closing mechanism in a trip position,

A plug-in base for supporting the circuit breaker;

A push trip mechanism movable in a direction to pressurize the cross bar or to release the pressurization of the cross bar so that the opening and closing mechanism is operated in the trip position;

A support member fixed to the bottom of the circuit breaker;

A first lever rotatably supported by the supporting member, the first breaker rotating to one side when the wiring breaker is installed on the plug-in base and the other lever to rotate to the other side when the wiring breaker is separated from the plug-in base; ,

A spring providing elastic force to the first lever to rotate in the other direction;

One end is connected to the first lever and the other end is provided to the pressure trip mechanism so as to be pressurized, so that the cross bar is released by releasing the pressure on the pressure trip mechanism when the first lever is rotated in one direction, A safety mechanism assembly having a second lever for pressing the pressure trip mechanism to rotate the cross bar to the trip position when the first lever rotates in the other direction;

It is achieved by providing a circuit breaker according to the present invention, characterized in that it comprises a projection which projects from the pressure trip mechanism in a horizontal direction and transmits pressure from the second lever of the safety mechanism assembly to the pressure trip mechanism. Can be.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a state diagram of the safety device assembly of the circuit breaker according to the embodiment of the present invention, Figure 4 is a safety device and plug-in base coupling of the circuit breaker according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention It is a coupling of the pressure trip device of the circuit breaker according to. The circuit breaker according to the embodiment of the present invention supports a circuit breaker in a circuit breaker having an opening and closing mechanism 80 for opening and closing a circuit and a cross bar 20 for operating the opening and closing mechanism 80 in a trip position. A plug-in base 50; A pressure trip mechanism 30 movable in the direction of pressing the cross bar 20 to rotate or releasing the pressure on the cross bar 20 so that the opening and closing mechanism 80 is operated in the trip position; The support member 64 fixed to the bottom of the wiring breaker and the support member 64 are rotatably supported. When the wiring breaker is installed on the plug-in base 50, the wiring breaker rotates to one side. When detached from the plug-in base 50, the first lever 61 for providing the action force while rotating in the other, the spring (not shown) for providing the elastic force to rotate the other to the first lever 61, and one end portion It is connected to the first lever 61 and the other end is provided to the pressure trip mechanism 30 so as to be pressurized, and when the first lever 61 is rotated in one direction, the pressure is released to the pressure trip mechanism 30 to cross the bar. The second lever 63 which releases the 20 and releases the second lever 63 to pressurize the pressure trip mechanism 30 to rotate the cross bar 20 to the trip position when the first lever 61 is rotated in the other direction. The safety mechanism assembly 60 which is provided ; And a protrusion 31 which protrudes horizontally from the pressure trip mechanism 30 and transmits the pressure from the second lever 63 of the safety mechanism assembly 60 to the pressure trip mechanism 30.

Reference numeral 10 denotes a single-pole blocking unit in which the fixed contactor, the movable contactor, and the arcing unit are mainly constituted, and the outside of the gas pressure exhaust port is sealed with an insulator case.

4 and 5, the safety mechanism assembly 60 inserts the second lever 63 into the insertion hole 41 of the outer bottom of the enclosure 40 so that the upper end of the second lever 63 is closed ( The support member 64 is fixedly installed on the outer bottom surface of the enclosure 40 in a state in which the protrusion 31 of the pressure trip mechanism 30 is opposed to the inside of the 40, and the pressure trip mechanism 30 is installed. It is assembled and installed between two adjacent single pole blocking units (10).

6 is an operational state diagram when the plug-in base is mounted in the wiring breaker according to the embodiment of the present invention, and FIG. 7 is an operation state diagram when the plug-in base is detached from the wiring breaker according to the embodiment of the present invention. 8 is a plug-in base mounting state diagram of the circuit breaker according to the embodiment of the present invention, and FIG. 9 is a plug-in base detachment state diagram of the circuit breaker according to the embodiment of the present invention.

6 and 8, when the wiring breaker is mounted on the plug-in base 50, the first lever 61 is pressed against the protrusion 51 of the plug-in base 50 to be torsional spring (not shown). Overcomes the elastic force in the counterclockwise direction and rotates clockwise about the rotational axis 62 (a, b), so that the second lever 63 connected to one end of the first lever 61 is The downward displacement causes displacement (c), so that the interference between the pressure trip mechanism 30 and the safety device 60 disappears, thereby enabling ON-OFF operation using the handle of the opening / closing mechanism 80. (d Here, the torsion spring has a center wound around the rotation shaft 62, one end of which is fixed to one side of the first lever 61, and the other end of which is fixed to one side of the support member 64. An elastic force is applied to the lever 61 to rotate in the direction of raising the second lever 63, that is, counterclockwise in the drawing.

 Meanwhile, referring to FIGS. 7 and 9, when the wiring breaker is detached from the plug-in base 50, the first lever 61 is distorted by the contact with the protrusion 51 of the plug-in base 50, thereby torsion spring. By the elastic force from the rotational axis about the rotation axis 62 in the counterclockwise direction (a ', b'), the second lever 63 connected to one end of the first lever 61, therefore, the rising displacement (C '), the upper end of the second lever 63 presses the protrusion 31 of the pressure trip mechanism 30 by this displacement, so that the entire pressure trip mechanism 30 is vertically displaced toward the crossbar 20. (E) the crossbar 20 rotates clockwise (f) by the upper end of the pressure trip mechanism 30 contacting and pressing the crossbar 20 (f), causing the mechanism portion 80 to trip ( g).

On the other hand, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, those skilled in the art will understand that various modifications and equivalent embodiments are possible from this. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

As described above, according to the circuit breaker according to the present invention, a part of a safety device is provided to a pressure trip device having a function of tripping a mechanism part using an arc pressure when a short circuit current occurs, thereby linking the safety device and the pressure trip device. When installing or removing the wiring breaker and plug-in base in the live state, keep the tripping state when the wiring breaker is not installed in the plug-in to prevent safety accidents. The safety function can be simply provided by inserting a part of safety device from the outside without the trouble of disassembling and installing it inside the wiring breaker, which shortens the working time and reduces the manufacturing cost by stably utilizing existing parts. It has an effect.

Claims (3)

In the wiring breaker which has a switchgear which opens and closes a circuit, and the crossbar which operates the switchgear to a trip position, A plug-in base for supporting the circuit breaker; A push trip mechanism movable in a direction to pressurize the cross bar or to release the pressurization of the cross bar so that the opening and closing mechanism is operated in the trip position; A support member fixed to the bottom of the circuit breaker; A first lever rotatably supported by the supporting member, the first breaker rotating to one side when the wiring breaker is installed on the plug-in base and the other lever to rotate to the other side when the wiring breaker is separated from the plug-in base; , A spring providing elastic force to the first lever to rotate in the other direction; One end is connected to the first lever and the other end is provided to be pressurized to the pressure trip mechanism to release pressure from the pressure trip mechanism when the first lever is rotated in one direction so that the cross bar is released. A safety mechanism assembly having a second lever for pressing the pressure trip mechanism to rotate the cross bar to the trip position when the first lever rotates in the other direction; And a protrusion for protruding horizontally from the pressure trip mechanism to transmit pressure from the second lever of the safety mechanism assembly to the pressure trip mechanism. The method of claim 1, And the spring is a torsion spring. The method of claim 1, The plug-in base has a circuit breaker having a protrusion for rotating the first lever in one direction.

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