KR100574895B1 - 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 includes an opening and closing mechanism for opening and closing a circuit, and a trip 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 the trip position. A trip operating rod movable in a direction to pressurize the trip bar rotationally or to release the pressurization of the trip bar; 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 providing an acting force while rotating in a rotational force; a spring providing an elastic force to rotate the first lever in the other direction; one end is connected to the first lever and the other end is pressurized to the trip operation rod. When the first lever is rotated in one direction, the pressure is released to the trip operating rod to release the trip bar, and when the first lever is rotated in the other direction, the trip bar is pressed to press the trip bar to the trip position. Including a safety mechanism assembly having a second lever for rotationally pressing And, if a circuit breaker is separate from the external base, so as to always maintain the tripped state of the switching mechanism and protects the user from the hot-line state from the electrical shock hazard.

Circuit Breakers, Plug-Ins, Safety Devices, Restraint Mechanisms

Description

Circuit Breaker {A Circuit Braker}

Figure 1a is a state diagram before the conventional circuit breaker is coupled to the outer base

Figure 1b is a state diagram after the conventional circuit breaker is coupled to the outer base

Figure 2 is a state diagram before the wiring breaker according to the present invention is coupled to the outer base

Figure 3 is a perspective view showing a state in which they are assembled in the single-pole breaking unit inside the wiring breaker to show the interlocking configuration of the safety mechanism assembly and the trip operating rod and the trip bar when the handle of the wiring breaker is in the trip position.

4 is an explanatory view of the main parts showing that the opening and closing mechanism of the wiring breaker before the wiring breaker according to the present invention is coupled to the external base is constrained in a trip state;

Figure 5 is a state diagram after the circuit breaker is coupled to the outer base in accordance with the present invention

Figure 6 is a perspective view of the internal single-pole breaking unit showing that the handle is free to operate after the wiring breaker is coupled to the outer base

7 is an explanatory view of the main parts showing that the opening and closing mechanism of the wiring breaker is released from the restraint to be in normal operation;

8 is a partially enlarged perspective view for showing a schematic configuration of a safety mechanism assembly according to the present invention;

Figure 9 is an exploded perspective view showing the detailed configuration of the safety mechanism assembly according to the invention

* Explanation of Signs of Major Parts of Drawings *

1 ... enclosure of wiring breaker 2 ... external base

3 ... handle 4 ... trip operating rod

5 ... trip bar 6 ... second lever

7.Support member 7a ... Mounting plate part

7b ... screw insertion hole 7c ... lever guide groove

7d ... spinning shaft 8 ... spring

9 ... 1st lever 9a ... working protrusion

9b ... rotary shaft 10 .... safety mechanism assembly

The present invention relates to a safety device for a circuit breaker, and more particularly, to protect a user from an electric shock that may occur in a live state during installation and removal of a plug-in type circuit breaker. The present invention relates to a circuit breaker provided with a safety device, and more particularly, to a circuit breaker provided with a safety device capable of restraining an opening / closing mechanism of a circuit breaker.

In general, a circuit breaker detects this by using a detection device in the event of an electrical ground fault or short circuit in a power system line of transmission and distribution or a connection line with an electrical device, and automatically cuts off the circuit, or opens and closes a circuit between a power supply side and a load side. It is an electric device used in the case.

Therefore, a safety accident may occur when installing and disconnecting the circuit breaker in the live state where electricity is energized, if necessary, so that the circuit breaker is not installed in the external base to prevent such a safety accident. In this case, it is necessary to restrain the opening and closing mechanism of the wiring breaker so that the wiring breaker is always tripped. Here, the opening and closing mechanism is a spring for applying the elastic energy to the support shaft rotatably supporting the movable contactor, the fixed contactor, the movable contactor, the elastic energy at the on position of the handle and to rotate the support shaft at the trip or off position of the handle. , Latch, latch to keep the spring in the on position of the handle, latch holder to release or restrain the latch, trip bar to displace the latch holder, etc. Therefore, detailed description of the configuration will be omitted.

1A and 1B are views showing the overall appearance before and after assembly with an external base of a conventional plug-in type circuit breaker.

As shown, the wiring breaker is an enclosure (1), an outer base (also called a plug-in base) on which the enclosure is mounted (also called a plug-in base), and a handle (3) for manual operation of the wiring breaker in the on or off position. In the conventional case, the wiring breaker was able to operate the circuit breaker on / off by the handle 3 regardless of whether the wiring breaker was mounted or detached from the outer base 2.

However, such a conventional circuit breaker does not have a safety device that can restrain the operation of the opening and closing mechanism of the circuit breaker according to the mounting or detachment of the external base, and thus, when installing or removing the plug-in type circuit breaker in the live state. There is a safety problem that may cause an electric shock accident of the operator because the circuit breaker is kept on.

The present invention is to solve the above problems, when the wiring breaker is separated from the outer base (2) restrains the opening and closing mechanism so that the opening and closing mechanism is always in a trip state, the wiring breaker to the outer base (2) By operating and turning on the handle (3) only when it is combined and mounted, it provides a wiring breaker to protect the operator (user) from electric shocks that may occur during the replacement and installation of the plug-in type circuit breaker. Its purpose is to.

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 trip bar for operating the opening and closing mechanism in a trip position, and is provided on an outer base,

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

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

A first lever rotatably supported by the support member, the first breaker rotating to one side when the wiring breaker is installed on the outer base and the other lever to rotate to the other side when the wiring breaker is separated from the outer 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 pressurized to the trip actuating rod, so that the trip bar is released by releasing the pressure on the trip actuating rod when the first lever rotates in one direction. And a safety mechanism assembly having a second lever for pressing the trip operating rod to rotate the trip bar to the trip position when the first lever rotates in the other direction. By providing a breaker.

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

Figure 2 is a perspective view showing a state before the circuit breaker of the present invention is coupled to the outer base, the safety mechanism assembly 10 according to the present invention is attached to the enclosure (1) of the conventional circuit breaker as an additional device and The base 2 is provided with a receiving groove (unsigned) so that the safety mechanism assembly 10 can be inserted and mounted.

Such a safety mechanism assembly 10 includes a support member 7 fixed to a bottom of a circuit breaker, as shown in a partially enlarged perspective view and an exploded perspective view of FIGS. 8 and 9;

It is rotatably supported by the supporting member 7, and when the wiring breaker is installed on the outer base 2, it rotates in one direction (in a clockwise direction), and the other side when the wiring breaker is separated from the outer base 2 A first lever 9 providing an action force while rotating in an anticlockwise direction (in the embodiment),

A spring 8 providing an elastic force to the first lever 9 so as to rotate in the other direction (in an embodiment counterclockwise);

One end is connected to the first lever 9 and the other end is provided to be pressurized to the trip operation rod (see reference numeral 4 in FIGS. 3, 4, 6 and 7), so that the first lever 9 is one-sided (in the embodiment of the watch). Direction) to release the trip bar (see reference 5 in FIGS. 3, 4, 6 and 7) by releasing the pressurization to the trip operating rod 4 and the first lever 9 to the other side (in an embodiment). And a second lever 6 for pressing the trip operating rod 4 to rotate the trip bar 5 to the trip position when rotated counterclockwise.

The supporting member 7 is provided with two screw insertion holes 7b for fixing the supporting member 7 at the bottom of the enclosure 1 of the circuit breaker at both ends and the second lever 6 at the central portion in the longitudinal direction. 7d of rotation plate which consists of a fixed plate part 7a provided with a lever guide groove 7d for guiding the shangdong, and a pin for rotatably supporting the first lever 9 on its lower side wall. It includes.

Preferably the spring 8 consists of a torsion spring, one end of which is supported on the upper surface of the first lever 9, the other end of which is on the side of the lower side wall of the support member 7. It is supported by and applies an elastic force to the 1st lever 9 so that it may rotate to one direction (counterclockwise direction).

The first lever 9 has an actuating protrusion 9a for contacting the outer base at one end thereof and receiving a pressure for rotating the first lever 9 in the other direction (clockwise). The rotary shaft hole 9b into which the rotary shaft 7d is inserted is provided, and the second lever 6 is connected to the other end thereof. The first lever 9 and the second lever 6 may be connected to each other by connecting a connection protrusion formed in the first lever 9 and a connection groove formed in the second lever 6, and a separate pin may be connected. Various connection configurations are possible, such as connecting through the connecting portions of both levers.

On the other hand, Figure 3 is a perspective view showing a state in which they are assembled in the single-pole breaking unit inside the wiring breaker to show the interlocking configuration of the safety mechanism assembly, the trip operating rod and the trip bar when the handle of the wiring breaker is in the trip position. to be. Referring to Figure 3 describes the interlocking configuration of the safety mechanism assembly, trip operation rod and trip bar.

The trip operating rod 4 is installed such that the upper end and the lower end of the second lever 6 of the safety mechanism assembly 10 come into contact with each other. The trip operating rod 4 is moved upwardly to rotate the trip bar 5 in the trip direction by the arc gas pressure discharged from the gas pressure trip mechanism which obtains the trip driving force by using the gas pressure of the arc gas. When not in use, it is a working rod that is repositioned downward by its own weight. In one embodiment, a single pole blocking unit (a phase blocking unit inside the wiring breaker refers to the entire lower part of the handle of FIG. 3, the inside of which is composed of an opening and closing mechanism comprising a movable contactor and a fixed contactor; Guide wall portion formed on the side of the single-pole blocking unit, the lower end of which is connected to the side arc gas discharge hole of the side, which is sealed with an insulating material, and only a hole for discharging arced arc is formed on the side and front and rear surfaces thereof. It is guided by and installed to be movable up and down. The trip bar 5 is positioned in contact with the trip rod 4 at the top of the trip rod 4. The second lever 6 of the safety mechanism assembly 10 according to the invention pushes the tripping rod 4 upward immediately as soon as the circuit breaker is disconnected from the outer base 2 irrespective of the operation of the gas pressure tripping mechanism. As a result, the trip operation rod 4 trips the opening and closing mechanism by pressurizing the trip bar 5.

On the other hand with reference to Figures 2, 3 and 4 will be described the operation tripped when the circuit breaker of the present invention is separated from the external base as follows.

When the circuit breaker is separated from the outer base 2 as shown in FIG. 2, as shown in FIG. 4, the actuating protrusion 9a of the first lever 9 acts with a force greater than that of the spring 8. While the pressure by the external base 2 is released, the first lever 9, which is in a horizontally lying posture (symbol ① state), rotates counterclockwise by the spring force of the spring 8 and stands at an angle. It becomes a posture (symbol ② state). Then the second lever 6 connected to the end of the first lever 9 rises upward (symbol 3), so that the trip operating rod 4 whose lower end is in contact with the second lever 6 also has It is pushed up by the 2nd lever 6 which rises (a symbol (4) state). When the tripping rod 4 is raised and its tip portion rotates by pushing the trip bar 5 (symbol ⑤ state), the opening / closing mechanism is operated to the trip position by the rotating trip bar 5 (symbol ⑥ state). . The circuit is thus cut off, which protects the operator from the risk of electric shock. At this time, in the single-pole breaking unit inside the wiring breaker, the handle 3 is in the trip position as shown in FIG.

Meanwhile, with reference to FIGS. 5, 6 and 7, when the circuit breaker of the present invention is mounted on the outer base 2, the trip bar 5 is released to freely operate the handle 3 in an on position or an off position. The operation to be possible is described as follows.

As shown in FIG. 5, the circuit breaker is coupled to the outer base 2 by inserting the safety mechanism assembly 10 into the receiving groove of the outer base 2. As can be seen with reference to FIG. 7, the first lever 9 in an oblique standing position is pressed by its lower end, that is, the actuating portion 9a by the bottom of the receiving groove of the outer base 2 ( Reference state 1) The first lever 9 rotates clockwise in the figure despite the elastic force of the spring 8 (reference state 2). At this time, if the locking jaw as shown in Figure 2 is formed in the receiving groove as a preferred embodiment, the rotation angle of the first lever 9 can be larger than when there is no such jaw, and thus the second lever 6 The amount of vertical displacement of the over trip trip rod 4 can also be greater. Then, the tripping rod 4 in which the second lever 6 connected to the end of the first lever 9 is lowered (symbol 3 state) and thus the lower end thereof is in contact with the second lever 6 is also The lowering descends by its own weight along the second lever 6 (sign ④ state). As the trip operation rod 4 descends, the tip end pressurizing the trip bar 5 releases the trip bar 5 to return to its original position (symbol ⑤), and the opening / closing mechanism also returns to the original position by the original trip bar 5. The handle 3 can be freely operated in the on position or the off position (symbol 6). At this time, the single-pole breaking unit inside the wiring breaker is operated in the off position or the on position as shown in FIG.

Preferred embodiments of the present invention as described above are disclosed for the purpose of illustration, and those skilled in the art will be able to make various modifications, changes, additions within the scope of the spirit set forth in the present invention and these should be seen as belonging to the claims of the present invention.

According to the present invention, a safety mechanism assembly having an additional device structure can be easily assembled and mounted without an additional accessory inside the existing circuit breaker. When the circuit breaker is separated from the external base, the opening and closing mechanism is driven by driving the internal trip device. The automatic tripping and the wiring breaker temperature can be operated only when the circuit breaker is connected to the external base and the wiring breaker temperature can be operated to prevent the safety accident that may occur when the wiring breaker is disconnected or installed in the live state.

Claims (2)

In the circuit breaker for wiring which is provided on the external base, which has an opening / closing mechanism which opens and closes a circuit, and a trip bar which operates the said opening / closing mechanism to a trip position, A trip operating rod movable in a direction to pressurize the trip bar or to release the pressurization to the trip bar so that the opening and closing mechanism is operated to a trip position; A support member fixed to the bottom of the circuit breaker; A first lever rotatably supported by the support member, the first breaker rotating to one side when the wiring breaker is installed on the outer base and the other lever to rotate to the other side when the wiring breaker is separated from the outer 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 pressurized to the trip actuating rod, so that the trip bar is released by releasing the pressure on the trip actuating rod when the first lever rotates in one direction. And a safety mechanism assembly having a second lever for pressing the trip operating rod to rotate the trip bar to the trip position when the first lever rotates in the other direction. The method of claim 1, And the spring is a torsion spring.

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