KR100972935B1 - Apparatus for indicating on/off state of air circuit breaker - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on / off state display device of a circuit breaker, and more particularly to a fastening structure of a micro switch that outputs an on / off state of a circuit breaker as an electrical signal. In addition, by simplifying the mechanical configuration for operating the micro-switch and at the same time stable operation is performed, it is easy to work according to the maintenance of the device, and the shape of each component constituting the device even after long-term use is deformed The on / off state display device of the air circuit breaker which improves the operation reliability of the device by preventing the closing of the device is provided.

Breaker, closing or tripping, micro switch

Description

ON / OFF status indicator of air circuit breaker {APPARATUS FOR INDICATING ON / OFF STATE OF AIR CIRCUIT BREAKER}

The present invention relates to an air circuit breaker, and more particularly, by displaying an on / off state of the air circuit breaker on and off according to the on and off of the air circuit breaker. The present invention relates to an on / off state display device of an air circuit breaker for easily grasping the state.

In general, air circuit breaker (ACB) is used for power distribution facilities used for industrial plants and generator protection of buildings, factories, ships, etc., and quickly extinguishes arcs generated during the opening and closing of normal loads and the breaking of accident currents. The low voltage circuit breaker for protecting the line and the equipment by separating the line.

The air circuit breaker has a fixed contactor and a movable contactor which contacts the fixed contactor and closes the energizing circuit and the movable contactor which is separated from the fixed contactor and is movable to a blocking (trip) position opening the energizing circuit. If an overcurrent occurs due to a fault somewhere in the line while passing through the circuit, the movable contactor is quickly disconnected from the fixed contactor to cut off the current to protect the internal circuits and accessories of the electronic device from the overcurrent, while Blow out compressed air by exposing both contacts to air to dissipate.

Such a breaker is installed in the cradle so that the breaker body can be pulled in and pulled out of the cradle, and the breaker body is installed in a disconnected position after being installed inside the cradle to prevent a short circuit risk due to activation of a large current. Full insertion into the cradle is achieved by moving to the connected position via the. The air circuit breaker has an on / off state such that the on / off state of the breaker main body according to the on and off of the breaker main body can be checked from an external or remote location of the device. (off) A status indicator is needed, which is a kind of monitoring device and safety device.

Hereinafter, a conventional apparatus for displaying an on / off state of a circuit breaker will be described with reference to the accompanying drawings. 1 is a perspective view showing a cradle of a conventional air circuit breaker, FIG. 2 is a right side view of the cradle of FIG. 1 showing the structure of an on / off state display device, and FIG. (on) / off (off) Status diagram showing the operating status of the device.

1 to 3, the horizontal of the lock assay device 70 actuated as the breaker body, not shown, enters the cradle 10 and moves from the disconnected position to the connected position via the test position. In movement, the pinion 76 coupled with the rack-pinion is rotated. Accordingly, the shaft 78, which is integrally coupled to the pinion 76, rotates together with the gear 80 connected to the end while rotating together.

Specifically, referring to FIG. 2, when the gear 80 rotates clockwise as the shaft 78 rotates, the cam 82 engaged with the gear 80 guides the crank pin 120. Rotate counterclockwise. On the other hand, one end is hooked with the tab 106 formed in the gear 80, the other end is connected to the vertical operation rod 100 to be described later lever 102 is in accordance with the counterclockwise rotation of the gear 80 By the seesaw movement vertical movement of the rod 100 is to move up and down. A moving terminal block 92 is connected to an upper end of the vertical operation rod 100, and the moving terminal block 92 is a sidewall 54 of the cradle 10 according to the vertical movement of the vertical operation rod 100. Vertical and horizontal movement is performed by the guide of the L-shaped guide groove 96 formed in the).

Referring to FIG. 3, the vertical operation rod 100 moves downward by the lever 102 which performs the seesaw motion according to the counterclockwise rotation of the gear 80 described above, and thus the moving terminal. The block 92 acts on the switch lever 142 supported on the spindle 144 while performing the vertical vertical movement and the horizontal horizontal movement of the L-shaped guide groove 96. ) Rotate it clockwise. Accordingly, the switch lever 142 presses the push button 138 of the switch 110. The state at this time is a connection position and corresponds to an on state of the circuit breaker main body. On the other hand, the trip (off) state of the breaker body is formed by the above process is performed upside down and the breaker body is pulled out from the connection position to the test position, in this case the switch lever 142 is rotated counterclockwise while the switch ( The push state of the push button 138 of the 110 is released.

As described above, the conventional circuit breaker on / off state display device has a push button 138 of the switch 110 when the breaker main body is turned on or tripped. By selectively pressing by 142, the on / off state of the air circuit breaker is output as an electrical signal so that the operator can check it from the outside or at a long distance.

However, the above-mentioned conventional circuit breaker on / off state display device has a problem of potential malfunction in implementing a function because its operation is very complicated due to the complexity of its mechanical configuration.

In addition, since the switch 110 is fixedly fitted to the switch base 154 of the cradle 10, when an overcurrent occurs, the cradle 10 is moved to a tripping position by separating the movable contactor from the fixed contactor. There is a great possibility that the switch 110 can be separated from the switch base 154 while a large vibration or shock is transmitted, and the switch lever 142 is also caused by the large vibration, shock or heat applied to the cradle 10 described above. There is a problem that the deformation can lead to a malfunction of the switch 110.

The present invention has been made in order to overcome the disadvantages of the prior art as described above, to further strengthen the fastening structure of the micro-switch outputting the on (off) state of the air circuit breaker as an electrical signal, the micro By simplifying the mechanical configuration to operate the switch and ensuring stable operation, it is not only easy to work on maintenance of the device, but also to close the closure as the shape of each component of the device is deformed even during long-term use. The technical problem is to provide an on / off state display device of an air circuit breaker, which improves the operation reliability of the device.

The on / off state display device of the air circuit breaker according to the present invention for achieving the above technical problem is formed on the sidewall of the cradle, when the circuit breaker body is drawn into the cradle or withdrawn from the cradle A switch lever vertically and horizontally moved according to the guide of the L-shaped guide groove; A plurality of micro switches mounted inside the switch housing installed outside the sidewall of the cradle; A guide tab fitted to a guide slit formed at the switch housing on a side surface thereof, and a plurality of push members for selectively pressing the roller buttons of each of the plurality of micro switches on a lower surface thereof, and acting on the switch lever by the action of the switch lever. A moving plate horizontally moving with a guide of the guide slit on a housing; And a spring having one end fixed to the switch housing and the other end supported on the moving plate to provide an elastic force for return of the moving plate.

In the embodiment of the present invention, when the breaker body is completely inserted into the cradle to form an input state, the plurality of micro switches may be pressed on by the roller buttons by the plurality of push members of the moving plate. While outputting a signal indicating the closing state to the outside, when the closing state of the breaker main body is released and the roller button is pressed and returned (off), outputs a signal indicating the trip state to the outside.

In one embodiment of the present invention, the plurality of micro switches comprises four micro switches arranged in a rectangular shape.

In one embodiment of the present invention, an insulating plate is interposed between the plurality of micro switches and between the plurality of micro switches and the switch housing.

In one embodiment of the present invention, the switch lever is installed in the cradle and the lock assay device for moving forward and backward in conjunction with the inlet / outlet of the breaker body; A shaft connected to both ends, the shaft being rotatable by the lock assay device; A cam mounted to the sidewall of the cradle to engage with the gear and rotate together; A lever which rotates in association with the rotation of the cam; A vertical operation rod having one end connected to the lever and the other end connected to a crossbar for vertical movement according to the rotation of the lever; And a guide of an L-shaped guide groove formed in the sidewall of the cradle by the action of the crossbar, one end of which is connected to the switch lever.

According to the on / off state display device of the air circuit breaker according to the present invention having the configuration as described above, the on / off state of the air circuit breaker as an electrical signal By making the fastening structure of the output micro switch more robust, simplifying the mechanical configuration for operating the micro switch, and ensuring stable driving, it is not only easy to maintain and maintain the device, but also for long-term use. There is an advantage in that the operation reliability of the device is improved by preventing the closing of the device as the shape of each component of the device is deformed.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the on (off) / off (off) state display device of the air circuit breaker according to the present invention. 4 is a perspective view of a cradle in which an on / off state display device of the air circuit breaker is installed, FIG. 5 is an enlarged view of a portion A of FIG. 4, and FIG. 6 is a switch shown in FIG. 4. 7 is a perspective view illustrating a plurality of micro switches and moving plates disposed in the housing, and FIGS. 7 and 8 are operation state diagrams of an on / off state display device of the air circuit breaker according to the present invention.

As shown in FIGS. 4 to 6, the on / off state display device of the air circuit breaker according to the present invention has a breaker body (not shown) drawn into the cradle 200 or the cradle 200. ), The switch lever 280 moves vertically and horizontally according to the guide of the L-shaped guide groove 212 formed in the side wall 210 of the cradle 200, and the side wall 210 of the cradle 200. A plurality of micro switches 330 mounted inside the switch housing 310 installed outside, and a guide tab 352 fitted to the guide slit 312 formed in the switch housing 310 on the side thereof. A plurality of push members 356 for selectively pressing the roller button 332 of each of the plurality of micro-switch 330 to the guide on the switch housing 310 by the action of the switch lever 280 Under horizontal movement with the guidance of the slit 312 Moving plate 350 and one end is fixed to the switch housing 310 and the other end is fixed to the moving plate 350 to provide a spring 360 to provide an elastic force for the return of the moving plate 350 Include. Reference numeral 320 denotes a supporter for mounting and fixing the switch housing 310 to the outside of the sidewall 210 of the cradle 200.

The switch lever 280 is installed in the cradle 200, the lock assay device 220 to move forward and backward by interlocking when the breaker body is pulled in / out, and the gear 232 is connected to both ends and the locker The shaft 230 rotates by the essay device 220, the cam 240 installed on the side wall 210 of the cradle 200 to be engaged with the gear 232 and rotate together, and the cam 240. Lever 250 that rotates in conjunction with the rotation of the), and one end is connected to the lever 250 and the other end is connected to the crossbar 270 to vertically move the rod according to the rotation of the lever (250) 260 and the guide of the L-shaped guide groove 212 formed in the side wall 210 of the cradle 200 by the action of the crossbar 270, one end of which is connected to the switch lever 280 vertically and horizontally You exercise.

The plurality of micro switches 330 may include four micro switches arranged in a rectangular shape, and may include an insulating plate between the plurality of micro switches 330 and between the plurality of micro switches 330 and the switch housing 310. 340 is interposed. The plurality of micro-switch 330 is the roller button 332 by the plurality of push members 356 of the moving plate 350 when the breaker body is completely inserted into the cradle 200 to form an input state. Is pressed on to output the signal indicating the closing state to the outside, and when the closing state of the breaker main body is released and the roller button 332 that is pressed is returned and turned off, the trip state is reset. Output the signal to the outside.

Hereinafter, the operation of the on / off state display device of the air circuit breaker according to the present invention will be described with reference to FIGS. 4 to 8.

First, referring to FIG. 4, when the lock assay apparatus 220 moves backward as the breaker body (not shown) is drawn into the cradle 200, the lock assay apparatus 220 and the rack- The pinion 234 of the pinion-coupled shaft 230 rotates to rotate the shaft 230, and the cam 240 engaged by the rotation of the gear 232 fixed to both ends of the shaft 230 is half. Rotate clockwise. Accordingly, the lever 250 mechanically engaged with the cam 240 rotates the vertical operation rod 260 vertically while rotating according to the trajectory shape of the cam 240. Accordingly, the crossbar 270 connected to the upper end of the vertical operation rod 260 and the switch lever 280 connected to one end of the crossbar 270 may have L-shaped guide grooves formed on the sidewall 210 of the cradle 200. The vertical and horizontal movements are made with the guidance of 212).

Accordingly, as shown in FIG. 8, the switch lever 280 is in the tripping state of the air circuit breaker as shown in FIG. 7. The moving plate 350 installed in the horizontally movable manner is moved to the right direction. The moving plate 350 is horizontally moved to guide the guide tab 352 fitted to the guide slit 312 of the switch housing 310, and the switch housing 310 is formed through a plurality of push members 356 formed on the lower surface thereof. ) By pressing the roller button 332 of each of the plurality of micro-switch 330 mounted in the) to output a signal informing the outside of the air circuit breaker. At this time, one end is fixed to the switch housing 310, the other end is fixed to the spring 360 supporting the moving plate 350 is tensioned to have an elastic force for the return of the moving plate 350.

On the other hand, if an overcurrent occurs due to a fault somewhere in the line in the above-mentioned closing state, an operating mechanism part (not shown) connected to the lock assay device 220 which acts to release the closing state of the breaker body acts as the lock. By moving the assay device 220 forward, the above process is reversed, so that the switch lever 280 returns to the initial position as shown in FIG. 7 through the left horizontal movement and the vertical vertical movement. Done. As the action force of the switch lever 280 acting on the moving plate 350 is released according to the return of the switch lever 280, the moving plate 350 is moved through the elastic force of the spring 360 described above with reference to FIG. 7. It will return to the initial position as shown in FIG. At this time, the roller button 332 of each of the plurality of pressed micro switch 330 is also turned off while returning to the initial position, and outputs a signal indicating the trip state to the outside.

As described above, in the detailed description of the present invention, a preferred embodiment of the present invention has been described, but those skilled in the art to which the present invention pertains various modifications can be made without departing from the scope of the present invention. Of course. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

1 is a perspective view showing a cradle of a conventional air circuit breaker,

Figure 2 is a right side view inside the cradle of Figure 1 showing the structure of the on (on) / off (off) state display device,

3 is an operating state diagram of the on / off state display device shown in FIG.

4 is a perspective view of a cradle in which an on / off state display device of the air circuit breaker according to the present invention is installed;

5 is an enlarged view of a portion A of FIG. 4;

6 is a perspective view illustrating a plurality of micro switches and moving plates disposed in the switch housing illustrated in FIG. 4;

7 and 8 are operating state diagrams of the on (off) / off (off) state display device of the air circuit breaker according to the present invention.

** Description of the symbols for the main parts of the drawings **

200: cradle 210: cradle sidewall

220: rock assay device 230: shaft

232: gear 234: pinion

240: cam 250: lever

260: vertical operation rod 270: crossbar

280: switch lever 310: switch housing

312: guide slit 314: spring support

320: supporter 330: micro switch

332: roller button 340: insulating plate

350: moving plate 352: guide tab

354: spring support 356: push member

360: spring

Claims (5)

A switch lever vertically and horizontally moved according to the guide of the L-shaped guide groove formed in the sidewall of the cradle when the breaker body is drawn into or taken out of the cradle; A plurality of micro switches mounted inside the switch housing installed outside the sidewall of the cradle; A guide tab fitted to a guide slit formed at the switch housing on a side surface thereof, and a plurality of push members for selectively pressing the roller buttons of each of the plurality of micro switches on a lower surface thereof, and acting on the switch lever by the action of the switch lever. A moving plate horizontally moving with a guide of the guide slit on a housing; And One end is fixed to the switch housing and the other end is fixed to the moving plate, the spring including an elastic force for returning the moving plate, When the breaker main body is completely inserted into the cradle to form the closing state, the plurality of micro switches may externally output a signal indicating the closing state by pressing the roller button on by the plurality of push members of the moving plate. On the other hand, when the closing state of the circuit breaker main body is released and the roller button pressed is returned (off), a signal indicating a trip state is output to the outside (on) of the circuit breaker On / off status indicator. A switch lever vertically and horizontally moved according to the guide of the L-shaped guide groove formed in the sidewall of the cradle when the breaker body is drawn into or taken out of the cradle; A plurality of micro switches mounted inside the switch housing installed outside the sidewall of the cradle; A guide tab fitted to a guide slit formed at the switch housing on a side surface thereof, and a plurality of push members for selectively pressing the roller buttons of each of the plurality of micro switches on a lower surface thereof, and acting on the switch lever by the action of the switch lever. A moving plate horizontally moving with a guide of the guide slit on a housing; And One end is fixed to the switch housing and the other end is fixed to the moving plate, the spring including an elastic force for returning the moving plate, The switch lever is installed in the cradle and the lock assay device for moving forward and backward in conjunction with the pull in / out of the breaker body; A shaft connected to both ends, the shaft being rotatable by the lock assay device; A cam mounted to the sidewall of the cradle to engage with the gear and rotate together; A lever which rotates in association with the rotation of the cam; A vertical operation rod having one end connected to the lever and the other end connected to a crossbar for vertical movement according to the rotation of the lever; And on / off of the air circuit breaker, which is vertically and horizontally moved by the guide of the L-shaped guide groove formed on the sidewall of the cradle by the action of the crossbar having one end connected to the switch lever. Status display. The method according to claim 1 or 2, The on / off state display device of the air circuit breaker, characterized in that the plurality of micro-switch is composed of four micro-switches arranged in a rectangle. The method according to claim 1 or 2, An on / off state display device of a circuit breaker, characterized in that an insulating plate is interposed between the plurality of micro switches and between the plurality of micro switches and the switch housing. delete

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