KR20130100596A

KR20130100596A - Ground connection structure of circuit breaker

Info

Publication number: KR20130100596A
Application number: KR1020120021956A
Authority: KR
Inventors: 이상철; 김대원; 강태우
Original assignee: 엘에스산전 주식회사
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2013-09-11

Abstract

The present invention provides a grounding structure of a circuit breaker having an enclosure for accommodating a circuit breaker main body having terminals connected to a bus terminal and a load terminal of the circuit breaker main body, the ground bus bar; And a ground connecting plate connecting the ground bus bar and the enclosure, wherein the ground connecting plate is characterized in that a fastening position for connection with the enclosure can be adjusted.

Description

Grounding structure of circuit breaker {GROUND CONNECTION STRUCTURE OF CIRCUIT BREAKER}

The present invention relates to a circuit breaker in which a circuit breaker can be easily connected to a ground bus bar by providing a connection structure for efficiently grounding the circuit breaker for facility and life protection.

Circuit breakers are devices for switching on and off the normal load of a circuit. For example, a vacuum circuit breaker quickly disconnects an arc in a vacuum interrupter by opening and closing a circuit and disconnecting an accident current, and quickly disconnects the circuit, and operates or controls power plants, substations, and motors. It is installed together with a switchboard that manages several electrical devices including breakers for driving.

Among these vacuum circuit breakers, the drawer type vacuum circuit breaker is first accommodated in an enclosure or a cradle and connected to the main circuit of the switchboard when the vacuum breaker is accommodated in the switchboard. Thus, when the breaker body is pulled in and out of the enclosure, it is connected or disconnected to the switchboard side main circuit.

The enclosure is mounted to a panel bottom plate. Here, the circuit breaker enclosure is connected to the panel's ground bus bar for safety.

1 shows a grounding structure in which an enclosure of a conventional circuit breaker is connected to a grounding bus bar. Referring to FIG. 1, the circuit breaker includes a hexahedral box-shaped enclosure 1 having an accommodating space 2 in which a vacuum circuit breaker main body (not shown) is accommodated, and a ground 1a of the enclosure is grounded. The busbar 4 is connected.

The side surface (1a) of the enclosure is formed with a screw hole (3) for connection with the ground boot bar, the screw hole (5) for fastening is also formed in the ground boot bar (4). Accordingly, through the screw hole of the ground bus bar and the screw hole of the enclosure using a fastening means 6 such as a bolt, the enclosure 1 and the ground bus bar 4 are connected to form a ground structure.

However, in this case, the connection position of the enclosure and the ground booth bar is changed according to the processing error during the processing of the ground booth bar or the enclosure, and there is a problem of forcibly deforming the enclosure or the ground booth bar to connect the enclosure. As a result, there were problems such as difficulty in work and deterioration in quality safety of the ground connection.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art.

The present invention when connecting the enclosure with the ground busbar for the safety of the circuit breaker, the connection position between the enclosure and the ground busbar to solve the difficulty of the connection between the enclosure and the ground busbar due to processing errors and to improve the reliability An object of the present invention is to provide a circuit breaker having an adjustable ground structure.

The present invention provides the following technical means to achieve the above object.

Here, the circuit breaker is an enclosure screw hole formed at one end of the enclosure; A ground screw hole formed in the ground bus bar; A first screw hole formed in the ground connecting plate and facing the enclosure screw hole; And a second screw hole formed in the ground connection plate and facing the ground screw hole, wherein at least one of the first screw hole and the second screw hole is formed in a long hole shape.

The ground connecting plate is aligned with the position of the first screw hole and the enclosure screw hole or the second screw hole and the ground screw hole to connect the enclosure and the ground boot bar.

The circuit breaker may include: first fastening means for fixing the enclosure and the ground connection plate through the first screw hole and the enclosure screw hole; and the ground bus bar and the ground connection plate through the second screw hole and the ground screw hole. It further comprises; a second fastening means for fixing the.

Accordingly, the circuit breaker is characterized in that the distance between the first fastening means and the second fastening means is adjusted so that the enclosure and the ground booth bar can be fixed and connected regardless of the space between each other.

The side of the configuration, regardless of the gap between the enclosure and the ground booth bar to adjust the position of the ground connecting plate to the outer box and the ground booth bar is connected to form a ground structure. Accordingly, the work convenience can be increased, and the reliability of the ground structure of the circuit breaker can be improved to improve reliability.

The present invention has the following effects by the technical configuration as described above.

The present invention has the effect of improving the convenience of work by adjusting the connection position of the enclosure and the ground busbar in consideration of processing errors such as the enclosure and the ground busbar of the circuit breaker.

In addition, the connection position can be naturally adjusted without forcibly connecting the enclosure of the circuit breaker and the ground bus bar by the processing error, thereby improving the quality reliability of the circuit breaker.

1 is a schematic view showing a conventional circuit breaker enclosure.
Figure 2 is a schematic diagram showing one embodiment of the grounding structure of the circuit breaker of the present invention.
3 is a schematic diagram showing a partial surface of the circuit breaker enclosure of FIG.
4 is a schematic view showing a ground connecting plate coupled to the circuit breaker enclosure of FIG.
5 and 6 are schematic views showing that the ground connection plate is coupled to the circuit breaker enclosure to adjust the connection position.

Hereinafter, with reference to the accompanying drawings will be described a specific content for practicing the present invention through an embodiment of the present invention.

Figure 2 shows an embodiment of the ground structure of the circuit breaker of the present invention. The circuit breaker of the present invention includes an enclosure 100 for accommodating the circuit breaker main body and having terminals connected to the bus terminal and the load terminal of the main body, respectively.

3 shows the side 110 of the circuit breaker enclosure. 2 and 3, the circuit breaker includes an hexahedral box-shaped enclosure 100 having an accommodating space in which a vacuum circuit breaker main body (not shown) is accommodated, and on the side surface 110 of the enclosure. Ground bus bar 140 is connected.

The side surface 110 of the enclosure is formed with an enclosure screw hole 120 for connection with the ground bus bar. In FIG. 2, two enclosure screw holes 120 are formed up and down. This is for a stable connection with the ground connection plate to be described later. However, the present invention is not limited to the number of the enclosure screw holes.

On the other hand, the ground bus bar is electrically connected to the enclosure. However, the ground bus bar is connected to the enclosure by a ground connecting plate to be described later. A ground screw hole 141 for fastening is also formed at the ground bus bar 140.

On the other hand, the circuit breaker of the present embodiment includes a ground connection plate 130 for connecting the ground bus bar and the enclosure. The ground connecting plate 130 is shown in more detail in FIG. 4.

Referring to FIG. 4, the ground connection plate 130 includes a first screw hole 131 facing the enclosure screw hole 120 and a second screw hole 132 facing the ground screw hole 141. Is formed.

Here, at least one of the first screw hole 131 or the second screw hole 132 is formed in a long hole shape. Both the first screw hole and the second screw hole may be formed in the long hole type, but even if only one of the long hole type, the connection position can be adjusted by the ground connecting plate.

Meanwhile, the grounding structure of the circuit breaker is connected to the enclosure 100 and the grounding bus bar 140 through a screw hole formed in the grounding bus bar and the enclosure using a fastening means 150 such as a bolt to form a grounding structure.

In more detail, the fastening means 150 penetrates the first screw hole and the enclosure screw hole, thereby penetrating the first fastening means 151 to fix the enclosure and the ground connecting plate, and the second screw hole and the ground screw hole. It includes a second fastening means 152 for fixing the ground bus bar and the ground connecting plate.

Here, the ground connecting plate 130 is aligned with the position of the first screw hole 131 and the enclosure screw hole 120 or the second screw hole 132 and the ground screw hole 141, the ground and the ground Busbars connect.

In the embodiment shown in Figure 2 the first screw hole was formed in a long hole shape. However, the present invention is not limited thereto, and as described above, the second screw hole may be formed in a long hole shape. Hereinafter will be described with reference to the embodiment shown in FIG.

5 and 6 show a state in which the ground connecting plate is connected to the enclosure. The ground connecting plate 130 may be adjusted a fastening position for the connection with the enclosure. That is, in FIG. 5, the first fastening means 151 penetrates the enclosure screw hole and the first screw hole to couple the enclosure and the ground connecting plate, but the first fastening means is biased to the right side of the first screw hole. It is.

However, in FIG. 6, the first fastening means 151 penetrates the enclosure screw hole and the first screw hole to couple the enclosure and the ground connecting plate, but the first fastening means is biased to the left side of the first screw hole. It is.

As described above, when a machining error occurs and the formation position of the enclosure screw hole of the enclosure is changed, or when the formation position of the ground screw hole of the ground booth is changed, the first connection is moved by moving the ground connecting plate from side to side. The means allow the position to be moved relatively along the first threaded hole which is elongated.

Accordingly, the position of the second screw hole 132 of the ground connection plate can be adjusted, and the second screw hole 141 to be penetrated by the second fastening means 152 together with the second screw hole. You can align the location of the hole.

Accordingly, the circuit breaker adjusts the distance between the first fastening means and the second fastening means, so that the enclosure and the ground booth bar can be fixedly connected regardless of the space between each other.

On the other hand, unlike the embodiment of Figure 2, when forming the second screw hole in the long hole type, as opposed to the above-described embodiment, the position of the first screw hole 131 of the ground connection plate can be adjusted, The position of the first screw hole may be aligned with the enclosure screw hole 120 to be penetrated by the first fastening means 151 together with the first screw hole.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the scope of the present invention is not to be construed as limited to such embodiments and / or drawings, and is determined by the matters set forth in the claims below. do. In addition, it should be clearly understood that improvements, changes, modifications, and the like apparent to those skilled in the art described in the claims are included in the scope of the present invention.

100: circuit breaker enclosure 110: side of the enclosure
120: enclosure screw 130: ground connection plate
131: 1st screw thread 132: 2nd screw thread
140: ground boot bar 141: ground screw hole
150: fastening means 151: first fastening means
152: second fastening means

Claims

In the grounding structure of a circuit breaker having a terminal for connecting the bus terminal and the load terminal of the circuit breaker main body, and having an enclosure for accommodating the circuit breaker main body,
Ground bus bar;
And a ground connection plate connecting the ground bus bar and the enclosure.
The ground connecting plate is characterized in that the fastening position for the connection with the enclosure can be adjusted,
Grounding structure of circuit breaker.

The method of claim 1,
An enclosure screw hole formed at one end of the enclosure;
A ground screw hole formed in the ground bus bar;
A first screw hole formed in the ground connecting plate and facing the enclosure screw hole;
And a second screw hole formed in the ground connecting plate and facing the ground screw hole.
At least one of the first screw hole or the second screw hole, characterized in that formed in the long hole type,
Grounding structure of circuit breaker.