KR20210090828A - Fault detection device for moving contact of a arc eliminator - Google Patents

Abstract

The present invention relates to a movable contact fault detection device of an arc eliminator comprising: a return plate that moves a movable rod having one end coupled to a ground electrode of the arc eliminator to an opening position; a contact part positioned on a surface facing the return plate of a handle coupled to the other end of the movable rod; and a pressure sensor that detects a contact pressure with the contact part to monitor whether or not the movable contact of the arc eliminator is abnormal when the movable rod moves to the opening position by the return plate. Therefore, the present invention is capable of having an effect of preventing an occurrence of a situation for which a removal of an arc is not possible.

Description

Fault detection device for moving contact of a arc eliminator

The present invention relates to a movable contact failure detection apparatus of an arc eliminator, and more particularly, to a movable contact failure detection apparatus of an arc eliminator capable of predicting the possibility of failure due to damage or fusion of the movable contact.

In general, a switchboard mainly receives high voltage power supplied by a power producer in a large facility such as a building or factory, converts it into a voltage that can be used in the facility, and distributes it to the distribution boards distributed through the trunk line.

Switchgear, lightning arrester, transformer, circuit breaker and various measuring equipment are provided inside the switchboard, and an arc eliminator is usually installed to prevent accidents caused by arcing.

The arc eliminator insulates the two electrodes (high voltage electrode and ground electrode) in an open state (non-energized state) in the normal state, and in the event of an arc accident in the switchboard, energizes the two electrodes at high speed to restore the power system to three phases. Short circuit to earth to eliminate arcing.

The configuration of the arc eliminator includes an arc extinguishing part, a movable contact, and a rod for driving the movable contact.

The arc extinguishing unit may be insulated with an insulating material by filling the case with _{SF 6} , an inert insulating gas having excellent insulating properties. The arc extinguishing unit is installed to be spaced apart from two electrodes, a high-voltage electrode and a grounding electrode, inside a case made of an insulating material, and a movable electrode is installed in a variable position inside the case.

The high-voltage electrode of the extinguishing unit is connected to a fixed bus bar provided in the switchboard so that high-voltage power is always applied, and the ground electrode is connected to the ground of the switchboard installation site through the grounding bus bar or a ground cable.

The arc eliminator has a closing mode in which the high voltage electrode and the ground electrode are energized by a movable contact, and an open mode (or return mode) in which the high voltage electrode and the ground electrode are not energized by the movable contact and the insulation between the high voltage electrode and the ground electrode is maintained ) has

The movable electrode of the arc extinguishing unit is moved to be in contact with each of the high voltage electrode and the ground electrode when the input mode is put in, so that the high voltage electrode and the ground electrode can be energized.

The movable electrode of the arc extinguishing unit may be moved so as not to come into contact with at least one of the high voltage electrode and the ground electrode when the open mode is opened (or returned) to insulate between the high voltage electrode and the ground electrode.

The configuration of the arc extinguishing unit of the arc eliminator has a different specific structure for each manufacturer, and there is a difference in the driving method and driving structure of the movable contact.

1 and 2 is a cross-sectional configuration diagram of a general arc eliminator, Figure 1 is an open mode, Figure 2 shows a state of the input mode.

The housing 110 maintains an airtight state, the high-voltage electrode 120 is fixedly installed on one side, and the ground electrode 130 is positioned opposite the high-voltage electrode.

The ground electrode is connected to the movable rod 140 , and according to the movement of the movable rod 140 , the ground electrode 130 may be moved to be driven in a state in contact with the high-voltage electrode 120 or in a spaced apart state.

The ground electrode 130 is fastened to the movable rod 140 by a fastening means such as a bolt, and by manipulating the movable rod 140 to put the ground electrode 130 in contact with the high-voltage electrode 120 or , the ground electrode 130 may be separated from the high voltage electrode 120 to return to the original state.

At this time, the structure for moving the movable rod 140 is also very diverse.

1 and 2, the high-voltage electrode 120 and the ground electrode 130 are illustrated as being vertically disposed, but in actual product design, they are generally horizontally disposed left and right.

3 and 4 are partial configuration diagrams of a return device among the conventional arc controller driving device.

3 shows the input mode, and FIG. 4 shows the open mode.

Referring to FIG. 3 , the movable rod 140 is connected to the inside of the housing 110 through a through hole formed in a portion of the return plate 150 , and is connected to the ground electrode 130 as described above.

3 is a state in which the movable rod 140 is input and the ground electrode 130 is in contact with the high voltage electrode 120 . The input device for inputting the movable rod 140 is omitted.

A device for inputting the movable rod 140 may be implemented in many different ways.

In this state, for the operation of the open mode to position the movable rod 140 back to its original position, the return plate 150 is moved in the direction of the handle 141 which is the end of the movable rod 140 .

At this time, the movement may be made by a driving means such as a motor.

A buffer unit 160 is positioned on the bottom surface of the return plate 150 to prevent the return plate 150 and the handle 141 of the movable rod 140 from colliding and being damaged.

The buffer unit 160 may include a buffer housing 161 and a spring 162 .

As shown in FIG. 4 , when the buffer unit 160 located on the lower surface of the return plate 150 moves downward while in contact with the handle 141 of the movable rod 140 , the movable rod 140 is It is retracted, and the ground electrode 130 is separated from the high voltage electrode 120 and is in an open state.

As such, in the related art, the inputted movable rod 140 can be positioned at its original position by using the return plate 150 .

However, in the conventional structure, even when the ground electrode 130 and the high-voltage electrode 120 are fused in the input state of the movable rod 140, or the internal electrode or the fastening part is damaged or damaged in the input operation, it is pushed back to the original position. Since it is configured to return, there is a problem that arc removal may not be made when the subsequent input mode is executed.

The problem to be solved by the present invention in view of the above problems is to provide a movable contact failure detection device of an arc eliminator capable of confirming in advance whether the movable contact is damaged in the operation process.

More specifically, the present invention provides a movable contact failure detection device of an arc eliminator that allows to check whether the movable contact is damaged when the open mode is performed by moving the movable rod to the original position for the next arc removal operation. is in providing.

A movable contact failure detection device of the present invention arc eliminator for solving the above technical problems, a return plate for moving the movable rod, the one end of which is coupled to the ground electrode of the arc eliminator, to an open position, and the other end of the movable rod Detecting the contact pressure between the contact part located on the surface facing the return plate of the handle and the contact part when the movable rod moves to the open position by the return plate to monitor whether the movable contact of the arc eliminator is abnormal Includes a pressure sensor.

In an embodiment of the present invention, the return plate may further include a buffer portion positioned on a surface facing the handle to relieve an impact when in contact with the contact portion.

In an embodiment of the present invention, the buffer unit includes a buffer housing having an open bottom surface, and an elastic part located in the buffer housing, and the pressure sensor has one surface in contact with the elastic part in the buffer housing. can be

In an embodiment of the present invention, the pressure detected by the pressure sensor may further include a processing unit for determining whether an abnormality occurs by comparing the pressure with the normal pressure.

In an embodiment of the present invention, the processing unit includes a memory for storing a normal pressure value, a control unit for determining whether there is an abnormality by comparing the detected pressure of the pressure sensor with the normal pressure stored in the memory, and determination of the control unit If an abnormality occurs as a result, a notification output unit for generating a notification may be included.

When the open mode is performed by moving the movable rod to the original position for the next arc removal operation, the present invention detects a change in pressure to check whether the movable contact is damaged, and then the closing mode is caused by the damaged movable contact. It has the effect of preventing the occurrence of a situation where arc removal is not possible due to progress.

1 and 2 are cross-sectional views of a conventional arc eliminator, respectively.
3 and 4 are schematic diagrams of a conventional arc eliminator driving device.
5 is a block diagram of a movable contact failure detection device of an arc eliminator according to a preferred embodiment of the present invention.
6 to 8 are operation state diagrams of the present invention, respectively.

In order to fully understand the configuration and effect of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various forms and various modifications may be made. However, the description of the present embodiment is provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention. In the accompanying drawings, components are enlarged in size than actual for convenience of description, and ratios of each component may be exaggerated or reduced.

Terms such as 'first' and 'second' may be used to describe various elements, but the elements should not be limited by the above terms. The above term may be used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a 'first component' may be referred to as a 'second component', and similarly, a 'second component' may also be referred to as a 'first component'. can Also, the singular expression includes the plural expression unless the context clearly dictates otherwise. Unless otherwise defined, terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those of ordinary skill in the art.

Hereinafter, with reference to the drawings, the movable contact failure detection device of the arc eliminator according to an embodiment of the present invention will be described in detail.

5 is a block diagram of a movable contact failure detection device of an arc eliminator according to a preferred embodiment of the present invention.

5, the movable contact failure detection device of the arc eliminator according to the preferred embodiment of the present invention has a through hole 21 through which the movable rod 11 of the arc eliminator 10 passes and the handle of the movable rod 11 The return plate 20 for moving the movable rod 11 to the open position by retracting the 12, the buffer part 30 located on a part of the bottom surface of the return plate 20, and the handle 12 The contact portion 50 positioned on the surface facing the return plate 20 and the pressure applied to the contact portion 50 when inserted into the buffer portion 30 to move the movable rod 11 to the open position. It is configured to include a pressure sensor 40 for detecting.

Hereinafter, the configuration and operation of the movable contact failure detection device of the arc eliminator according to the preferred embodiment of the present invention configured as described above will be described in more detail.

First, the arc eliminator 10 includes a high-voltage electrode and a ground electrode therein, and the ground electrode is coupled to the end of the movable rod 11 so that the high-voltage electrode when the movable rod 11 is put into the arc eliminator 10 . Remove the arc by making contact with the ground electrode.

The specific configuration of the arc eliminator 10 is independent of the technical idea of the present invention, and the present invention can be applied regardless of the specific configuration of the arc eliminator 10 .

A handle 12 is formed at the opposite end of the movable rod 11 . The handle 12 is a component that makes it easy to operate the movable rod 11 in the input or open mode.

5, the configuration of the driving device for putting the movable rod 11 into the arc eliminator 10 is omitted. If it is coupled to the handle 12 and transmits power for inputting the movable rod 11 to the arc eliminator 10, it can be applied to the present invention regardless of the configuration.

A contact portion 50 is formed on a surface of the handle 12 that faces the return plate 20 .

The contact part 50 may be integrally formed with the handle 12 , and may be coupled to the handle 12 as a separate component.

One end of the movable rod 11 is connected to the ground electrode of the arc eliminator 10 through the through hole 21 formed in the return plate 20 , and the handle 12 is fixed to the other end.

That is, when the movable rod 11 is put in, the return plate 20 does not act, and is located close to the arc eliminator 10 so that interference does not occur in the input operation.

A buffer unit 30 is coupled to the bottom surface of the return plate 20 .

The buffer part 30 may be formed of a buffer housing 31 and an elastic part 32 such as a spring that is prevented from being separated from the inside of the buffer housing 31 .

The buffer housing 31 has a structure in which the central part of the lower side is opened in the coupled state, and thus the contact part 50 is inserted into the buffer housing 31 in the opening operation, and the cushioning action by the elastic part 32 is performed. This can be done.

In addition, a pressure sensor 40 is installed in the buffer housing 31 . One surface of the pressure sensor 40 is supported by the elastic part 32 .

In FIG. 5 , the configuration of the processing unit that receives and processes the pressure value detected by the pressure sensor 40 is omitted.

The processing unit may preferably include a memory, a control unit, and a notification output unit. The memory may store the pressure value in the normal contact state of the arc eliminator 10, and the control unit determines whether there is an abnormality by comparing the pressure value detected by the pressure sensor 40 with the normal pressure value of the memory, If there is an abnormality, the notification output unit may serve to control the occurrence of a notification.

Normal contact state can be defined as the state in which the movable contact is not fused to the fixed contact by blocking the arc well.

The configuration of such a processing unit can be variously changed and implemented.

6 is a partial configuration diagram of the present invention in a state in which the movable rod 11 is put.

Referring to FIG. 6 , the movable rod 11 is put into the arc eliminator 10 by a not-shown input device, and the arc is removed by contacting the ground electrode and the high-voltage electrode.

At this time, as described above, the return plate 20 is positioned at a position where it does not interfere with the input operation of the movable rod 11, and even when the input operation is completed, the buffer unit 30 and the pressure sensor 40 are in contact with the contact part ( 50) does not come into contact with

Then, as shown in FIG. 7 , the return plate 20 moves toward the handle 12 in the state of FIG. 6 in order to perform an opening operation for separating the ground electrode and the high voltage electrode.

The return plate 20 may be moved by a driving means such as a motor.

The return plate 20 moves toward the handle 12 so that the contact part 60 comes into contact with the pressure sensor 40 located in the buffer part 30, and due to this contact, the Power is transmitted to the handle 12 and the movable rod 11 through the contact portion 60 .

In addition, the pressure sensor 40 detects a contact pressure with the contact unit 60 .

If the ground electrode and the high-pressure electrode are fused to each other in the previous input state of the movable rod 11 , a pressure lower than the pressure by the return plate 20 moving by the same driving force is detected by the pressure sensor 40 . do.

This is because the fusion of the electrode may act as a resistance to the movement of the return plate 20 .

Conversely, if the coupling between the movable rod 11 and the ground electrode is broken, the resistance component to the movement of the return plate 20 is removed, and a pressure higher than the normal pressure can be detected by the pressure sensor 40 . .

Therefore, it is possible to detect whether the movable contact of the arc eliminator is abnormal in the opening operation through the aforementioned processing unit.

As the state of FIG. 7 progresses, the movable rod 11 and the handle 12 are positioned at their original positions.

Then, as shown in FIG. 8 , the return plate 20 moves away from the handle 12 again, and then moves to a position where interference does not occur in the input operation.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: arc eliminator 11: movable rod
12: Handle 20: Return plate
30: buffer unit 40: pressure sensor
50: contact part

Claims (6)

a return plate for moving the movable rod having one end coupled to the ground electrode of the arc eliminator to an open position;
a handle coupled to the other end of the movable rod; and
and a pressure sensor for monitoring whether the movable contact of the arc eliminator is abnormal by detecting the contact pressure with the handle when the movable rod moves to the open position by the return plate. According to claim 1,
The handle is
The movable contact failure detection device of the arc eliminator further comprising a contact portion positioned on the surface facing the return plate. 3. The method of claim 2,
The movable contact failure detection device of the arc eliminator further comprising a buffer portion positioned on the surface of the return plate facing the handle to relieve an impact when in contact with the contact portion. 4. The method of claim 3,
The buffer unit,
It includes a buffer housing having an open surface facing the contact part, and an elastic part located in the buffer housing,
The pressure sensor is a movable contact failure detection device of the arc eliminator in which one surface is in contact with the elastic part in the buffer housing. 5. The method of claim 4,
The movable contact failure detection device of the arc eliminator further comprising a processing unit that compares the pressure detected by the pressure sensor with the pressure of the normal contact state and confirms whether an abnormality occurs. 6. The method of claim 5,
The processing unit,
memory for storing normal pressure values;
a control unit for determining whether there is an abnormality by comparing the pressure detected by the pressure sensor with the normal pressure stored in the memory;
If an abnormality occurs as a result of the determination of the control unit, for generating a notification - A movable contact failure detection device of the arc eliminator including a notification output unit.

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