KR101942379B1 - Switch for confirming motion of circuit breaker - Google Patents

Abstract

The purpose of the present invention is to provide a switch for confirming an operation of a circuit breaker, which operates a contact point of a cell switch by using a mechanical structure and reduces impact transferred to a cell switch. According to an embodiment of the present invention, the switch for confirming an operation of a circuit breaker comprises: a first lever rotated by hitting force of a hitting member interlocked with an introducing (closing) operation of a circuit breaker body; a rotating shaft rotating in connection with rotation of the first lever; a cam plate coupled to the rotating shaft to have a coincided rotation behavior; a cam groove formed on the cam plate, extended to be curved in the rotating direction of the cam plate, and having a plurality of sections having different curvatures; a cell switch member including a driven rod coupled to the cam groove to be slid and having at least one movable contact point, and at least one fixed contact point contacting with and separated from the movable contact point; and a second lever separated from the first lever, rotated by the hitting force of the hitting member, and rotating the rotating shaft when rotated. The first lever is arranged at a position rotated by the hitting member in a service position of the circuit breaker body, and the second lever is arranged at a position rotated by the hitting member at a testing position of the circuit breaker body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switch for confirming the operation of a circuit breaker,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switch for confirming the operation of a circuit breaker, and more particularly, to a switch for confirming the operation of a circuit breaker for generating a signal informing an external device whether the circuit breaker is open or closed at a test position and a service position of the circuit breaker.

In general, a high-voltage circuit breaker is an electrical device necessary to shut off a high-voltage, large-capacity current. When the circuit breaker is in operation, a display indicating that the circuit breaker is in operation is required for safety.

As the operation display device as described above, MOC (Mechanism Operated Cell switches) or an auxiliary switch inside the breaker can be used.

However, because of the disadvantage that the auxiliary switch operates not only at the service position of the circuit breaker (the position where the circuit breaker body is drawn into the cradle and energizes the circuit) but also at the withdrawal position (the position where the circuit breaker main body is drawn out from the cradle, MOC is usually used in places where it is required, for example in power plants or large factories.

Here, the MOC is generally installed in the circuit breaker main body and receives the striking force of the switch rod interlocked with the closing operation of the breaker main body to turn on / off the multi-cell switch.

However, the conventional MOC has a problem that the striking force of the switch rod is directly transmitted to the multi-cell switch, thereby causing a failure such as a contact break of the multi-cell switch. Here, the switch rod has a high striking power because it is linked to the quick operation of the movable contactor provided in the breaker main body.

On the other hand, in order to solve such a disadvantage, Japanese Utility Model Registration No. 20-0277418 discloses an electromagnetically operated cell switch device of a high voltage circuit breaker which confirms the operation state of the circuit breaker by using an electrical signal.

However, there is a disadvantage that a malfunction is more likely to occur in the electromechanical cell switch device such as the Registration Practical Utility Model No. 20-0277418 than in the mechanical switch due to the noise interference and the magnetic force on the electrical signal.

KR 20-0277418 Y1

SUMMARY OF THE INVENTION The present invention has been made in order to solve at least some of the problems of the conventional art as described above, and it is an object of the present invention to provide a method for operating a contact of a cell switch using a mechanical structure, And an object thereof is to provide a switch.

According to one aspect of the present invention, there is provided a circuit breaker comprising: a first lever which is rotated by a striking force of a striking member interlocked with a closing operation of a circuit breaker body; A rotating shaft that rotates in conjunction with rotation of the first lever; A cam plate coupled to the rotating shaft so as to have rotational behavior; A cam groove formed in the cam plate and extending in a curved shape along the rotational direction of the cam plate, the cam groove having a plurality of sections having different curvatures; A movable switch slidably coupled to the cam groove and having at least one movable contact, and at least one stationary contact contacting and separating from the movable contact; And a second lever spaced from the first lever and rotating by the striking force of the striking member and rotating the rotating shaft when the first lever is rotated by the striking member at a service position of the breaker body, And the second lever is disposed at a position rotated by the striking member at a test position of the breaker main body.

According to one embodiment of the present invention having such a configuration, the effect of improving the operation reliability, operation stability, and durability of the apparatus can be obtained.

1 is a front perspective view of an operation confirmation switch according to an embodiment of the present invention.
2 is a rear perspective view of the operation confirmation switch shown in Fig.
3 is an operational state view of the breaker body of the operation confirmation switch shown in Fig. 1 when it is placed in the test position and the breaker is opened.
Fig. 4 is an operational state view of the breaker body of the operation confirmation switch shown in Fig. 1 when the breaker body is placed at the test position and the breaker is turned on.
5 is an operational state view of the breaker body of the operation confirmation switch shown in Fig. 1 when it is disposed in the service position and the breaker is opened.
6 is an operational state view of the breaker body of the operation confirmation switch shown in Fig. 1 when the breaker body is disposed at the service position and the breaker is turned on.
7 is an operational state view of the breaker body of the operation confirmation switch shown in Fig. 1 when it is disposed at the withdrawal position.
8 is a view showing the internal contact structure of the cell switch member included in the operation confirmation switch shown in FIG.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

Various embodiments of the present invention will now be described with reference to the accompanying drawings.

First, the operation confirmation switch 100 according to an embodiment of the present invention will be described with reference to Figs. 1, 2, and 8. Fig.

1, 2, and 8, the operation check switch 100 according to an embodiment of the present invention includes a frame 110, a first lever 120, a second lever 130, A shaft 140, a power transmission bar 150, a link member 160, a cam plate 170, a cam groove 172, and a cell switch member 180.

1 and 2, the frame 110 is a structure in which a first lever 120, a second lever 130, and a rotating shaft 140 are rotatably installed. Further, the frame 110 may be provided with a plurality of cell switch members 180.

Such a frame 110 can unitize the operation confirmation switch 100 according to an embodiment of the present invention into one device.

Although not shown, the frame 110 may be mounted to a cabinet or cradle of the circuit breaker.

The first lever 120 may be rotatably mounted on the frame 110 via a first rotation shaft 122.

The first lever 120 may be rotated by the striking force of the striking member 10 interlocked with the closing operation of the circuit breaker body (not shown).

In one embodiment, the first lever 120 is provided at one end thereof with a striking portion 124 which is in contact with the striking member 10, and the other end thereof is rotatably hinged to the power transmitting bar 150 . The first lever 120 having such a structure can rotate based on the first rotation shaft 122 when the striking member 124 is pressed by the striking member 10.

Although not shown, a return spring (not shown) may be connected to the first lever 120 to restore the first lever 120 to an original position when no external force is applied to the first lever 120.

The second lever 130 is spaced apart from the first lever 120 on the frame 110 and may be rotatably mounted on the frame 110 via a second rotation shaft 132.

The second lever 130 can be rotated by the striking force of the striking member 10.

In one embodiment, the second lever 130 may have a striking portion 134 at one end thereof to be in contact with the striking member 10, and the other end may be rotatably hinged to the power transmission bar 150 to be described later . The second lever 130 having such a structure can be rotated with respect to the second rotation shaft 132 where the striking member 134 is pressed by the striking member 10.

Also, although not shown, a return spring (not shown) may be connected to the second lever 130 to return the second lever 130 to an original position when no external force is applied to the second lever 130.

Meanwhile, as described above, the operation confirmation switch 100 according to an embodiment of the present invention is mounted on a cabinet or a cradle of the circuit breaker and is fixed in position.

Then, the breaker main body can be disposed at the withdrawal position, the test position, and the service position while being drawn into the cradle. At this time, the striking member 10 provided in the breaker main body can also be disposed at the pull-out position, the test position and the service position according to the position of the main body of the vehicle.

Here, the pull-out position means that the bus bar of the circuit breaker body is separated from the bus bar provided in the cabinet, and the control device of the circuit breaker body is also disconnected from the terminal of the cradle so that power is not supplied to the circuit breaker body and the power system is also cut off.

In the test position, the bus bar of the breaker main body is separated from the bus bar provided in the cabinet, but the control device of the breaker main body is connected to the terminal of the cradle to supply power to the breaker main body and shut off the power system.

The service position means that the bus bar of the breaker main body is connected to the bus bar provided in the cabinet and the control device of the breaker main body is also connected to the terminal of the cradle so that power is supplied to the breaker main body and the power system is also energized.

When the striking member 10 is disposed at the withdrawal position, the test position, and the service position together with the circuit breaker main body, the first lever 120 is positioned at the service position of the circuit breaker body at a position rotatable by the striking member 10 And the second lever 130 can be disposed at a position rotatable by the striking member 10 at the test position of the breaker body.

The operation confirmation switch 100 may be installed at a position where the first lever 120 and the second lever 130 are out of the striking range of the striking member 10 when the breaker main body is disposed at the withdrawal position .

The operating state of the operation confirmation switch 100 according to one embodiment of the present invention will be described later with reference to FIG. 3 to FIG.

The rotation shaft 140 is rotatably coupled to the frame 110 and rotates in conjunction with the rotation of the first lever 120.

The power transmission bar 150 is a linear member coupled to the first lever 120 and the second lever 130 and can reciprocate along with the rotation of the first lever 120 and the second lever 130 have.

The first lever 120 and the second lever 130 are coupled to both ends of the power transmission bar 150 so as to minimize the size of the operation confirmation switch 100 of the present invention, The power transmission bar 160 may be coupled to the center of the power transmission bar 150, but is not limited thereto.

One end of the link member 160 is connected to the power transmission bar 150 and the other end is connected to the rotation shaft 140 to transmit the movement force of the power transmission bar 150 to the rotation shaft 140, Can be rotated.

The cam plate 170 is a plate-shaped member in which the rotational behavior of the cam plate 170 is matched with the rotational shaft 140.

The cam groove 172 may be formed in the cam plate 170 and may have a plurality of sections that are curved along the rotational direction of the cam plate 170 and have different curvatures.

In one embodiment, the cam groove 172 may be formed in the form of a hole through the cam plate 170, but is not limited thereto.

When the cam groove 172 is formed in the shape of a through hole, a coupling pin 184 provided in the passive rod 182 of the cell switch member 180, which will be described later, may be inserted into the cam groove 172. The driven rod 182 fastened to the cam groove 172 can move in a linear direction according to the shape of the cam groove 172 when the cam plate 170 rotates.

2, the cam groove 172 has a section 172a for pushing the driven rod 182 in one direction in accordance with the rotational position of the cam plate 170 and a section 172a for pushing the driven rod 182 toward the driven rod 182 And a pawl section 172b that pulls the pawl 180 to the other side. Here, the pushing section 172a and the pulling section 172b are formed continuously.

The pushing section 172a can push the passive rod 182 in the direction away from the rotary shaft 140 and the pulling section 172b can pull the passive rod 182 in the direction toward the rotary shaft 140 .

To this end, for example, the pushing section 172a may be formed closer to the rotation center of the cam plate 170 than the pulling section 172b.

Also, in one embodiment, the frame 110 may be provided with a pair of cell switch members 180 on both sides of the cam plate 170, as shown in Figs. At this time, in order to simultaneously operate the pair of cell switch members 180, the cam plate 170 may have a symmetrical shape of the cam groove 172 on both sides of the outer periphery.

The cell switch member 180 includes a passive rod 182 slidably coupled to the cam groove 172 and having at least one movable contact 186 as shown in Figure 8, And at least one stationary contact 188 that is separated.

In this configuration, depending on the direction of movement of the driven rod 182, the movable contact 186 may contact the fixed contact 188 or may be separated at the fixed contact 188.

The cell switch member 180 may be turned on / off according to whether the breaker is turned on or off to transmit the closing operation of the breaker to the external device as a signal.

The coupling pin 184 may be provided at the distal end of the passive rod 182 to be inserted into the cam groove 172 and the coupling pin 184 may be inserted into the cam groove 172 to smoothly slide in the cam groove 172. [ Sectional shape smaller than the width of the protrusion 172, or may be configured to be rotatable as a roller, but the present invention is not limited thereto.

The operation confirmation switch 100 according to the embodiment of the present invention having the above-described structure transmits the striking force of the striking member 10 to the contacts of the cell switch member 180 through a mechanical structure, It has the advantage of less.

The operation confirmation switch 100 according to an embodiment of the present invention is configured such that a strong hitting force of the striking member 10 is applied to the first lever 120 and the second lever 130, Through the connecting portion between the power transmission bar 150 and the link member 160 and the connecting structure between the cam groove 172 and the passive rod 182 of the cam plate 170, So that the load applied to the contact of the cell switch member 180 is remarkably reduced.

Particularly, since the direction in which the rotational force of the cam plate 170 and the direction in which the driven rod 182 is operated differ from each other in the course of turning the rotational force of the cam plate 170 to the linear movement of the driven rod 182, Positive loads can be mitigated.

Hereinafter, the operation of the operation confirmation switch 100 according to the embodiment of the present invention will be described with reference to Figs. 3 to 7. Fig.

3 and 4 show a case where the breaker main body is disposed at a test position.

3 and 4, when the breaker body is disposed at the test position, the striking member 10 provided in the breaker body is disposed at a position where the second lever 130 can be struck.

At this time, if the circuit breaker main body is opened, the state where the striking member 10 does not rotate the second lever 130 is maintained as shown in FIG.

When the breaker body is closed, the striking member 10 presses the striking part 134 of the second lever 130 to rotate the second lever 130 as shown in FIG.

The power transmitting bar 150 and the link member 160 interlock with each other to rotate the rotating shaft 140 and the cam plate 170 coupled to the rotating shaft 140 rotates .

At this time, the passive rod 182 fastened to the cam groove 172 of the cam plate 170 linearly moves according to the shape of the cam groove 172 to move the movable contact 186 and the stationary contact 188 of the cell switch member 180, Can be separated or contacted.

Next, Figs. 5 and 6 show a case where the circuit breaker main body is disposed at a service position.

5 and 6, when the breaker body is disposed at the service position, the striking member 10 provided in the breaker body is disposed at a position where the first lever 120 can be struck.

At this time, if the circuit breaker main body is opened, the state where the striking member 10 does not rotate the first lever 120 is maintained as shown in FIG.

When the circuit breaker body is closed, the striking member 10 presses the striking portion 124 of the first lever 120 to rotate the first lever 120, as shown in FIG.

The power transmitting bar 150 and the link member 160 interlock with each other to rotate the rotary shaft 140 and the cam plate 170 coupled to the rotary shaft 140 is rotated .

At this time, the passive rod 182 fastened to the cam groove 172 of the cam plate 170 linearly moves according to the shape of the cam groove 172 to move the movable contact 186 and the stationary contact 188 of the cell switch member 180, Can be separated or contacted.

Finally, Fig. 7 shows a case where the circuit breaker main body is disposed at the withdrawal position.

7, when the breaker main body is disposed at the withdrawal position, the striking member 10 is released to a position where it can not strike the first lever 120 and the second lever 130. [

Accordingly, the operation confirmation switch 100 according to the embodiment of the present invention does not operate when the circuit breaker main body is disposed at the withdrawal position, thereby ensuring operational reliability.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

10: Striking member
100: Switch for checking operation of circuit breaker
110: frame 120: first lever
122: first rotating shaft 130: second lever
132: second rotating shaft 140: rotating shaft
150: Power transmission bar 160: Link member
170: cam plate 172: cam groove
172a: pushing section 172b: pulling section
180: cell switch member 182:
184: fastening pin 186: movable contact
188: Fixed contact

Claims (7)

A first lever which is rotated by a striking force of a striking member interlocked with a closing operation of the circuit breaker main body;
A rotating shaft that rotates in conjunction with rotation of the first lever;
A cam plate coupled to the rotating shaft so as to have rotational behavior;
A cam groove formed in the cam plate and extending in a curved shape along the rotational direction of the cam plate, the cam groove having a plurality of sections having different curvatures; And
A movable member slidably coupled to the cam groove and having at least one movable contact, and at least one stationary contact contacting and separating from the movable contact; And
And a second lever spaced from the first lever and rotated by a striking force of the striking member and rotating the rotating shaft when rotated,
Wherein the first lever is disposed at a position rotated by the striking member at a service position of the breaker body,
And the second lever is disposed at a position rotated by the striking member at a test position of the breaker main body.
The method according to claim 1,
Wherein the cam groove includes a pushing section for pushing the passive rod in one direction and a pulling section for pulling the passive rod to the other in accordance with the rotational position of the cam plate.
3. The method of claim 2,
Wherein the cam groove is formed in a hole shape passing through the cam plate,
Wherein the passive rod includes a coupling pin inserted into the cam groove.
delete The method according to claim 1,
A power transmission bar coupled to the first lever and the second lever; And
And a link member having one end connected to the power transmission bar and the other end connected to the rotation shaft to transmit the movement force of the power transmission bar to the rotation shaft.
6. The method of claim 5,
Wherein the power transmission bar is rotatably coupled to the first lever at one end and rotatably coupled to the second lever at the other end, and the link member is rotatably coupled at the center.
The method according to claim 1,
And the first lever and the second lever are out of the striking range of the striking member when the circuit breaker main body is disposed at the drawn-out position.

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