KR101201711B1 - Position detector for vacuum circuit breaker - Google Patents

Abstract

PURPOSE: A position sensor for a vacuum circuit breaker is provided to steadily press an operation lever by including a bending unit on a second board unit of an operation board in order to press or release the operation lever of a micro switch. CONSTITUTION: A supporting bracket(58) is fixed to a vacuum circuit breaker. An operation board(59) is supported by the supporting bracket which can ascend and descend. A micro switch is fixed and installed on the supporting bracket. The micro switch comprises an operation lever(55a) in order to receive mechanical contact point opening and closing driving force. The operation lever is extended within an elevating trace of a second board unit of the operation board.

Description

Position detector for vacuum circuit breaker {POSITION DETECTOR FOR VACUUM CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum circuit breaker, and in particular, a position detector for a vacuum circuit breaker that provides an open / closed position detection signal to monitor whether the vacuum circuit breaker reaches the operation position or the input or shut off position at a remote location (distant). It is about.

A vacuum circuit breaker (also known as a vacuum circuit breaker) monitors abnormal currents on power circuits of very high or high voltages such as tens of kilovolts, and automatically cuts off the power circuit when an abnormal current occurs to protect the lines and loads connected to the rear stage. As a power device that can be used, it is generally used in the power distribution boards and in the distribution and distribution of power, such as a power station or substation, in a switchboard together with a surveillance protection device such as a digital relay.

These vacuum circuit breakers have a fixed type that is impossible to move the breaker body and a withdrawable type that can move the breaker body, and drawout type vacuum circuit breakers are frequently used according to the convenience of maintenance and replacement.

These draw-out vacuum circuit breakers are broadly divided to include a cradle, a breaker body, and a truck assembly.

Here, the cradle is an enclosure of the vacuum circuit breaker fixedly installed in the switchboard and having a terminal portion for connecting to an external power supply side and load side power lines.

The circuit breaker main body may include a main circuit part including a vacuum interrupter provided for each phase of a three-phase alternating current, a switching mechanism for simultaneously opening and closing the main circuit part, and a terminal part of the cradle. It comprises a main body side terminal part.

A truck assembly, also called a transport bogie assembly, is a spindle that is pivoted by a handle and has a threaded surface on its surface, and a nut assembly fixed therein so as to be movable back and forth along the threaded surface of the spindle. And a truck (also known as a transport cart) having wheels rotatably provided on the side surface thereof. The truck provides a means for loading the breaker body on top and moving the breaker body.

The vacuum circuit breaker has an operating position (run position, or so-called connection position) to which the terminal portion of the main body side and the cradle's terminal are connected, and the terminal portion of the main body side and the cradle are separated, but the control power is connected to the circuit breaker main body. It has a test position that can be tested for normal opening and closing, and a disconnection position (or disconnection position) in which the main terminal side and the cradle terminal section are separated and the control power is disconnected and the control power supply is also cut off.

The operation position is further divided into a circuit closing position and a circuit opening position according to the circuit opening and closing position according to the contact or opening position between the contacts in the vacuum interrupter of the main circuit unit. Can lose.

In order to monitor whether the vacuum circuit breaker is in the current operating position, the user had to open the door of the switchboard and check the open / close position indicator provided on the front operation part of the breaker body in which high voltage may be energized at the closing position. In this case, there was a risk that an electrical safety accident could occur to the verifier.

Therefore, in order to protect the safety of the checker (manager), in order to monitor the operation position of the vacuum circuit breaker even at a remote place (distant), the means for converting the operation position of the vacuum circuit breaker into an electrical signal and providing it as a position detection signal. The position detector of the vacuum circuit breaker is required.

In addition, when the vacuum circuit breaker is in the operating position, it can be safely monitored from the remote location to see whether it is in the input position or the blocking position. As a means, a position detector of a vacuum circuit breaker is required.

Therefore, an object of the present invention is to provide a vacuum circuit to check and monitor the operation position of the vacuum circuit breaker in a safe state at a user (administrator) in a safe or remote location (distant) outside the switchboard, which is a position safely separated from the vacuum circuit breaker. It is to provide a position detector of a vacuum circuit breaker that converts the operation position of the breaker into an electrical signal and provides it as a position detection signal.

Another object of the present invention, the vacuum so that the user (administrator) can check the opening and closing position at the operating position of the vacuum circuit breaker in a safe state at the outside or remote (distant) of the switchboard which is a position spaced apart from the vacuum circuit breaker. The present invention provides a position detector of a vacuum circuit breaker which converts an electrical signal to a position detection signal while being in an operating position of a circuit breaker and provides a position detection signal.

One object or another object of the present invention described above is a position detector for a vacuum circuit breaker,

A support bracket fixed to the vacuum circuit breaker and having a top plate and a pair of side plates for supporting the top plate at a lower side thereof;

A first plate portion which is supported by the support bracket so as to be lifted and lowered from the upper plate of the support bracket, and a second plate portion which is connected between the first plate portion and is liftable together and positioned between both side plates of the support bracket. Working plate with; And

It has an operating lever extending into the lifting trajectory of the second plate portion of the working plate to receive the mechanical contact opening and closing driving force, and is fixed to the support bracket to provide an electrical position detection signal of the vacuum circuit breaker according to whether the second plate portion is pressed. It can be achieved by providing a position detector for a vacuum circuit breaker according to the invention, characterized in that it comprises a micro switch (MICRO SWITCH) for emitting.

In addition, an object of the present invention, the cradle (CRADLE) having a terminal portion connected to the external power supply and load-side circuit to provide a supporting base, the operating position and the terminal portion of the cradle connected to the terminal portion of the cradle A breaker body having a body terminal portion having a test position or a separation position to be separated and a vacuum interrupter for circuit opening and closing, and a truck assembly for loading the breaker body and moving in the cradle to the operation position, test position or separation position (TRUCK) For vacuum circuit breakers with ASSEMBLY),

An electrical position detection signal indicating whether a vacuum circuit breaker is located at the driving position according to whether or not the truck assembly is in contact with the truck assembly when the main body terminal portion of the breaker body is in a driving position, It can be achieved by providing a position detector for a vacuum circuit breaker according to the present invention comprising a position detecting device for providing a.

In addition, another object of the present invention, the cradle (CRADLE) having a terminal portion connected to the external power supply and load side circuit to provide a support base (SUPPORTING BASE); A main terminal portion having an operation position connected to the terminal portion of the cradle, a test position or a separation position separated from the terminal portion of the cradle, a vacuum interrupter for circuit opening and closing, a closing position for closing the circuit and a breaking position for opening the circuit; Having a breaker body; A vacuum circuit breaker having a truck assembly (TRUCK ASSEMBLY) which loads the circuit breaker body and is movable in the cradle to the operating position, the test position or the separating position, wherein the position detector for the vacuum circuit breaker comprises:

A landing lever connected to the breaker body in the truck assembly and movable to protrude downwardly or retreat upwardly according to the closing position or blocking position of the breaker body; And

A position detection device installed at a predetermined position among the cradles in contact with the protruding lever and providing an electrical position detection signal indicating whether the breaker body is in the closing position or the blocking position depending on whether the operating lever is in contact; It can be achieved by providing a position detector for a vacuum circuit breaker according to the present invention comprising a.

The position detector for a vacuum circuit breaker according to the present invention is fixed to a vacuum circuit breaker, and has a support bracket having a top plate and a pair of side plates for supporting the top plate at a lower side (SUPPORTING BRACKET); A first plate portion which is supported by the support bracket so as to be lifted and lowered from the upper plate of the support bracket, and a second plate portion which is connected between the first plate portion and is liftable together and positioned between both side plates of the support bracket. Working plate with; And an actuating lever extending into the lifting trajectory of the second plate portion of the working plate to receive a mechanical contact opening and closing driving force, and fixedly mounted to the support bracket so that the electrical position detection signal of the vacuum circuit breaker depends on whether the second plate portion is pressed. Since it includes a micro switch (MICRO SWITCH); operating means according to the opening or closing position of the circuit breaker body reaches the operating position of the vacuum circuit breaker or the operating position of the circuit breaker when the operating plate is pushed down by lowering the operating plate is the operating lever of the micro switch By operating the internal contact of the micro switch by pressing, it is possible to output the position detection signal indicating the operation position of the vacuum circuit breaker or the open / close position, and to receive the operation position of the vacuum circuit breaker by receiving the position detection signal from the remote place. Remotely monitor whether or not to open or close There can be obtained an effect that makes.

The position detector for the vacuum circuit breaker according to the present invention has one end supported on the upper plate of the support bracket and the other end supported on the first plate of the working plate, and moves to a position to release the operation lever of the micro switch. Since it further includes a return spring for imparting an elastic force to the working plate, when the downward pressing force of the power transmission means for the working plate is eliminated, it is possible to obtain the effect that the working plate can be automatically returned to its original position.

In the position detector for a vacuum circuit breaker according to the present invention, each side plate of the support bracket has a guiding slit portion, and the second plate portion of the working plate so that the lifting movement is guided by the guiding slit portion. Since there is a pair of guide shoes (GUIDING SHOES) is formed extending from both sides and inserted into the guide slit portion, it is possible to obtain the effect that the lifting of the working plate can be stably guided by the guide shoes and the guide slit.

In the position detector for a vacuum circuit breaker according to the present invention, the second plate portion of the working plate has a lower bent portion to press or release the actuating lever of the micro switch. The effect can be reliably pressed.

In the position detector for a vacuum circuit breaker according to the present invention, the first plate portion of the working plate further extends downward to balance the lifting movement of the first plate portion of the balance extension portion, wherein the upper plate of the support bracket is Since the guide pipe portion for guiding the lifting movement of the balance extension further includes, the working plate is balanced when the lifting movement can be obtained the effect of moving up and down linearly.

The position detector for the vacuum circuit breaker according to the present invention is installed at a predetermined position among the cradles in contact with the truck assembly when the breaker main body is in the operating position, and indicates whether the vacuum circuit breaker is in the operating position according to the contact of the truck assembly. Since a position detection device capable of providing a position detection signal is included, an effect of providing an electrical position detection signal indicating whether or not the vacuum circuit breaker is located at an operating position according to the contact of the truck assembly can be obtained.

The position detector for the vacuum circuit breaker according to the present invention is connected to the breaker body in the truck assembly, the lifting lever which is movable to protrude downward or retreat upwards according to the closing position or break position of the breaker body; And a position detecting device installed at a predetermined position among the cradles which are in contact with the lifting lever, and providing an electrical position detection signal indicating whether the breaker main body is in the closing position or the blocking position according to whether or not the contacting lever is in contact. In accordance with the appearance of the intrusion lever, an effect of providing an electrical position detection signal indicating whether the breaker body is in the closing position or in the blocking position can be obtained.

1 is a perspective view showing the external configuration and main components of the breaker body for a vacuum circuit breaker in which a position detector according to a preferred embodiment of the present invention can be installed,
2 is a perspective view showing a configuration of a position detector of a vacuum circuit breaker according to a preferred embodiment of the present invention;
3 is a longitudinal cross-sectional view of the position detector of FIG.
Figure 4 is a perspective view of the cradle showing the appearance of the cradle included in the vacuum circuit breaker and the installation position of the position detector according to an embodiment of the present invention installed in the cradle,
FIG. 5 is a view illustrating a cradle and a breaker main body and a main body when the terminal part of the main body of the breaker body is separated from the terminal of the cradle of the vacuum circuit breaker, but the control power is supplied to the breaker main body to test whether the breaker main body is normally opened or closed. As an operational state diagram showing an operation state of the position detector according to a preferred embodiment of the present invention, the advantaged dashed line is a partial enlarged view showing only the operation state of the position detector separately at the test position;
6 is an operation state diagram showing an operation state of the cradle and the breaker main body and the position detector according to the preferred embodiment of the present invention during the progress to the operation position where the terminal portion of the cradle and the main body side terminal of the breaker main body of the vacuum circuit breaker are connected. Partial enlarged view showing only the operation state of the position detector separately while the dashed line is in the middle of the driving position.
7 is a view illustrating an operation state of the cradle and the breaker main body and the position detector according to the preferred embodiment of the present invention in a state where the cradle and the breaker main body of the vacuum circuit breaker are completed in the operation position where the terminal portion of the circuit breaker and the main terminal side of the breaker body are connected; As a state diagram, the part of the double-dot chain circle shows a partial enlarged view showing only the operation state of the position detector separately in the state where the process to the operation position is completed.
8 is an operation state diagram showing a state in which the landing lever descends to protrude downward from the bottom of the truck assembly when the breaker body is in the closing position in a state in which the landing lever is attached to the truck assembly according to another embodiment of the present invention;
9 is an operation state diagram showing a state in which the lifting lever does not protrude downward from the bottom of the truck assembly when the breaker body is in the blocking position in a state where the mounting lever is attached to the truck assembly according to another embodiment of the present invention.
10 is a cradle and a breaker main body and a position according to a preferred embodiment of the present invention when the operating position of the breaker main body is an operating position at which the terminal portion of the cradle of the vacuum circuit breaker and the main terminal side of the breaker main body are connected, and the operating position of the breaker main body is an injection position. As an operational state diagram showing the operation state of the detector, the dashed line circle is not only the operation position when the vacuum circuit breaker is viewed from the whole side but also the operation state of the position detector according to the preferred embodiment of the present invention separately at the closing position when the breaker body is viewed. Magnified view,
11 is a cradle and a breaker main body and a position according to a preferred embodiment of the present invention when the operating position of the breaker body is the operating position at which the terminal portion of the cradle of the vacuum circuit breaker and the terminal side terminal portion of the breaker body are connected and the operating position of the breaker body is the breaking position. As an operational state diagram showing the operation state of the detector, the dashed line is a partially enlarged view showing only the operation state of the position detector in the blocking position when the breaker body is viewed at the same time as the operation position when the vacuum circuit breaker is viewed from the whole surface.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

First, the outline of the circuit breaker main body of the vacuum circuit breaker with reference to FIG. 1, which is a perspective view showing the outline and main components of the circuit breaker main body of the vacuum circuit breaker in which the opening and closing position detector and the malfunction preventing device according to the preferred embodiment of the present invention may be installed. And a brief description of the main components.

The circuit breaker main body 10 for the vacuum circuit breaker in which the opening / closing position detector and the malfunction prevention device according to the preferred embodiment of the present invention can be installed is largely divided into the main circuit part 10a, the main body side terminal parts 10b and 10c, and the front surface. It is comprised including the operation part 10d.

As described above, the main circuit unit 10a is provided for each phase of three-phase alternating current, and may be configured as a circuit interrupter and a vacuum interrupter having a fixed contact point and a movable contact point in the vacuum vessel. The vacuum interrupter is closed through the main terminal side portions 10b and 10c and the cradle terminal portions (see numerals 41a and 41b in Fig. 8) to close the power circuit between the external power supply side and the load side, and to open the power circuit. Has a location.

The main body side terminal portions 10b and 10c are terminal portions of the circuit breaker main body 10 electrically connected to the fixed contact and movable contact sides of the vacuum interrupter, respectively, and the cradle's terminal portions (see numerals 41a and 41b of FIG. 5). It can be electrically connected to the power circuit between the external power supply three-phase circuit and the load-side three-phase circuit through. The expected main body side terminal portions 10b and 10c are composed of three terminals on the power supply side and three terminals on the load side, each having a plurality of finger contactors at its ends.

The front operation part 10d is a user interface part in a vacuum circuit breaker provided with an operation button and a display part, an operation handle of an input spring, etc., in which a user can open and close the vacuum circuit breaker.

The circuit breaker main body 10 further includes an opening and closing mechanism (not shown) for driving the movable contact of the vacuum interrupter of the main circuit unit 10a to the open / closed position. Here, the opening and closing mechanism is, as is well known, a driving source of a spring or electric actuator for opening and closing operation, and a plurality of links for transmitting power from the driving source to a movable contact of the vacuum interrupter of the main circuit portion 10a. It can be configured to include.

The breaker body 10 is mounted on the truck assembly 30 as shown in FIG. 1 and is movable in accordance with the movement of the truck assembly 30.

The girder assembly 20 supports and exposes the handle connecting end 31a of the spindle (not shown) of the truck assembly 30. When the operation handle (not shown) is connected to the handle connecting end 31a and rotates, the truck assembly 30 is driven in the front-rear direction while the spindle rotates.

Girder assembly (girder assembly) 20 is provided with a support bar (20a) for fixing to the cradle to be described later on both sides of the longitudinally retractable. In this case, the expression of being wanderable is used in FIG. 1 by moving the unsigned handle included in the girder assembly 20 laterally so that the support bar 20a connected to the handle is extended in the longitudinal direction of the girder assembly 20. This is because it is movable to protrude or conceal laterally from the end. Therefore, by pulling the handle forward while operating the support bar 20a in the hidden position, the truck assembly 30 and the truck assembly 30 connected to the girder assembly 20 and the girder assembly 20 through the spindle are The loaded breaker body 10 can be pulled out completely and separated from the cradle described later.

The supporting bar 20a is an unsigned supporting hole portion provided corresponding to the front side of the cradle 40 (the terminal side is the rear side and the opposite side is the front side), which can refer to FIG. 4. It can be inserted into and supported.

On the other hand, with reference to Figure 2, which is a perspective view showing the configuration of the truck assembly and the girder assembly of the vacuum circuit breaker, the configuration and action of the truck assembly 30, which is the means of the inlet and outtake movement of the breaker body of the vacuum circuit breaker Briefly explain.

The truck assembly 30 includes a truck (unsigned, also called a transfer truck) and a nut assembly (not shown).

The truck is also called a conveyance bogie, and the retracting direction or cradle (symbol 40 in FIG. 5) which loads the breaker main body 10 on the upper part and approaches the terminal portions 41a, 41b side of the cradle (symbol 40 in FIG. 5). It is a means for moving away from the terminal portions (41a, 41b) of the drawer approaching toward the girder assembly 20 of FIG. The truck is provided with four wheels 32 that are axially supported in a rollable manner and are installed in pairs on each side.

The spindle has a handle connecting end 31a extending into the truck and exposed to the outside through the girder assembly 20. The spindle is threaded on most surfaces and provides a driving force for the truck to move when it is rotated by the connection of a control handle (not shown).

The nut assembly is fixed to the front side of the truck and engages with the threaded surface of the spindle and is movable back and forth along the threaded surface of the spindle.

On the other hand, with reference to Figure 4, which is a perspective view of the cradle showing the appearance of the cradle included in the vacuum circuit breaker and the installation position of the opening and closing position detector installed in the cradle with respect to the schematic configuration of the cradle and the installation position of the opening and closing position detector installed in the cradle The explanation is as follows.

As can be seen in FIG. 4, the cradle 40 has an open front, both side plates 43, a lower base portion 42, and a top cover portion (not shown), a guide. It may be configured with, for example, a steel enclosure including the rail 44 and the terminal portions 41a and 41b. The cradle 40 is also a means of providing a support base to the circuit breaker body 10.

The main body side terminal portions 10b and 10c shown in FIG. 1 are connected to the terminal portions 41a and 41b of the cradle 40 shown in FIG. 4 and the operating portions connected to the terminal portions 41a and 41b of the cradle 40. 41b) has a test position or separation position.

In particular, the base portion 42 may be composed of a substrate spaced apart from the bottom bottom surface of the cradle 40 by a predetermined height and a space portion between the substrate and the bottom bottom surface. In the space part, the position detector 50 is provided so that the upper part may protrude from the said board | substrate.

In FIG. 4, the position where the position detector 50 is installed in the front-rear position of the base portion 42 of the cradle 40 is the rear end of the cradle 40 on which the terminal portions 41a and 41b are installed.

The guide rail 44 is a rail for providing and guiding a movement path of the wheels 32 of the truck assembly 30 described above, and a pair of guide rails 44 each have a side plate 43 of the cradle 40. It is installed along the front and rear directions of the cradle 40 on the inner wall surface of the bottom.

On the other hand, with reference to Figure 2 is a perspective view showing the configuration of the position detector of the vacuum circuit breaker according to a preferred embodiment of the present invention, and Figure 3 is a longitudinal cross-sectional view of the position detector of Figure 2 in the preferred embodiment of the present invention The configuration of the open / close position detector will be described.

Opening and closing position detector according to a preferred embodiment of the present invention comprises a support bracket 58, a working plate 59 and a micro switch (MICRO SWITCH) 55 is largely divided.

The support bracket 58 is fixedly installed at a predetermined position among the cradles of the vacuum circuit breaker. According to a preferred embodiment, the support bracket 58 is fixedly installed at a predetermined position of the above-described base portion 42 of the cradle of the vacuum circuit breaker. The support bracket 58 has one top plate 52 and a pair of side plates 53 which support the top plate 52 from below.

The top plate 52 may be connected to and secured to the bottom surface of the substrate of the base 42 of FIG. 4 by screwing means such as a bolt nut. The upper plate 52 includes a first guide tube portion 52a and a second guide tube portion 52b.

The first guide tube portion 52b is a tube portion having an empty upper portion and an open portion extending upwardly from an upper surface of the upper plate 52 and of which the upper and lower portions are opened. When the narrow lower portion is elevated, the lower portion of the first plate portion 51 is guided. In addition, the first guide tube portion 52b may also perform a function of guiding its tension and shrinkage by installing a return spring 56 which will be described later.

The second guide tube portion 52a is formed to protrude upward from a position adjacent to the first guide tube portion 52b of the upper surface of the upper plate 52 so as to guide the lifting and lowering of the balance extension portion 51c described later. The inner part is empty and the upper and lower parts are open.

The pair of side plates 53 support the upper plate 52 from the lower side, and each has a guiding slit portion 53a. The pair of side plates 53 and the top plate 52 form a flange for connection at the top of the side plate 53, and the flange and the bottom surface of the top plate 52 face each other, such as bolt nuts. By fastening by means of fastening.

The working plate 59 includes a first plate portion 51 and a second plate portion 54 and is supported by a first support bracket 58 so as to be lifted and lowered.

The first plate portion 51 is located to protrude upward from the top plate 52 of the first support bracket 58. The first plate portion 51 is composed of a plate including a head and a lower portion extending between both side plates 53, the width of which is narrower and longer than the head. The head portion of the first plate portion 51 is composed of a substantially trapezoidal plate portion having an inclined surface 51a on both sides and a plane 51b between the two inclined surfaces 51a.

 The second plate portion 54 is connected to the first plate portion 51 as part of the action plate 59 positioned between both side plates 53 of the first support bracket 58, and can be lifted together. Here, the connection with the first plate part 51 may be performed by connecting bolts, nuts, and washers 54a of the lower part of the first plate part 51 and the second plate part 54 to be described later, according to a preferred embodiment. It can be achieved by connecting by.

The second plate portion 54 includes a connecting portion 54a, a guide shoe 54b, a bent portion 54c, and an upper guide protrusion 54d.

The connection part 54a is formed upright from the center upper part of the plate surface of the 2nd board part 54, and is a part for connecting with the lower part of the 1st board part 51 as mentioned above.

The guide shoe 54b is formed to extend from both sides of the second plate portion 54 of the action plate 59 and is inserted into the guide slit portion 53a of the side plate 53 to lift the action plate 59 up and down. Guide reliably.

The bent portion 54c is bent at a right angle forward from the plate surface of the second plate portion 54 at the lower portion of the second plate portion 54, and is pressed while lowering the operation lever 55a of the micro switch 55. Freed while ascending.

The upper guide protrusion 54d is provided to protrude forward from the plate surface of the second plate portion 54 on both sides of the upper portion of the second plate portion 54, and each of the smooth second plate portions (on both side plates 53) ( Guide the descent of 54).

The micro-switch 55 is a means for emitting an electrical signal by opening or closing an internal contact by mechanical contact as is well known, and as shown in FIG. 6, an action plate 59 for receiving a mechanical contact opening and closing driving force. ) Has an operating lever 55a extending into the lifting trajectory of the second plate portion 54. The actuating lever 55a, as is well known, is provided with a roller at the tip to reduce the mechanical impact by rotation. The micro switch 55 is fixedly installed on the side plate 53 of the first support bracket 58 so that the mechanical contact of the inside of the figure is opened and closed according to whether the second plate 54 is pressed or not. An electrical position detection signal indicating whether the operation position is reached or the closing position or breaking position (that is, opening and closing position) of the circuit breaker main body 10 may be emitted.

Reference numeral 55b designates a fixing screw for fixing the micro switch 55 to the inner wall surface of the side plate 53.

On the other hand, the operation position detection operation of the position detector according to an embodiment of the present invention configured as described above with reference to Figures 5 to 7 as follows.

First, the main body side terminal portions 10b and 10c of the circuit breaker body 10 are separated from the terminal portions 41a and 41b of the cradle 40 of the vacuum circuit breaker with reference to FIG. 5. When the control terminal is connected to a control terminal (not shown) of the cradle 40, for example, when the control power is supplied to the circuit breaker main body 10 as a DC power supply, the test terminal can test whether the circuit breaker is normally open or closed. The operation of the cradle 40 and the breaker body 10 and the position detector 50 according to the preferred embodiment of the present invention will be described.

Referring to FIG. 5, the truck assembly 30 is located at the front of the base 42 of the cradle 40 at the test position, and the open / closed position detector is located at the rear of the base 42 of the cradle 40. It is far from 50.

Accordingly, the first plate portion 51 rises without the load applied from the upper portion, and thus the lower second plate portion 54 connected to the first plate portion 51 releases the operating lever 55a of the micro switch 55. . As the internal contact of the micro switch 55 is opened, the micro switch 55 emits an electrical position detection signal indicating that the circuit breaker body 10 is not the current operating position.

Operation position detection operation of the position detector according to a preferred embodiment of the present invention at the test position can be performed almost the same in the separation position.

That is, although not shown, since the truck assembly 30 and the breaker body 10 are not present in the cradle 40 at the disconnected position of the vacuum circuit breaker, the first plate portion 51 rises due to no load pressing from the top. The lower second plate portion 54 connected to the first plate portion 51 releases the operation lever 55a of the micro switch 55. As the internal contact of the micro switch 55 is opened, the micro switch 55 emits an electrical position detection signal indicating that the circuit breaker body 10 is not the current operating position.

Next, the cradle 40 and the circuit breaker main body 10 and the position detector 50 according to the preferred embodiment of the present invention when proceeding from the test position to the operation position in the state of the progress of the operation of Fig. 7 through FIG. Will be explained.

In the state of FIG. 6 in the state of progressing to the driving position, the rear end projection 30a of the truck assembly 30 may touch the upper surface of the first plate portion 51, but the downward pressing load does not act. The first plate portion 51 rises without a load pressed from the upper portion, so that the lower second plate portion 54 connected to the first plate portion 51 releases the operation lever 55a of the micro switch 55. As the internal contact of the micro switch 55 is opened, the micro switch 55 emits an electrical position detection signal indicating that the circuit breaker body 10 is not the current operating position.

On the other hand, in the state of FIG. 7 which progressed to the driving position, when the truck assembly 30 is located on the plane via the inclined surface of the 1st board part 51 and presses the 1st board part 51 downward, the 1st board part 51 ) Is lowered and the lower second plate portion 54 connected to the first plate portion 51 presses the operation lever 55a of the micro switch 55. As the internal contact of the micro switch 55 is closed, the micro switch 55 emits an electrical position detection signal indicating that the circuit breaker body 10 is in the current operating position.

On the other hand, the configuration and the opening and closing position detection operation of the position detector according to another preferred embodiment of the present invention will be described with reference to FIGS.

First, a configuration of a position detector according to another exemplary embodiment of the present invention will be described with reference to FIGS. 8 to 9.

As shown, the position detector according to another preferred embodiment of the present invention is connected to the breaker body 10 in the truck assembly 30, and according to the closing position or blocking position of the breaker body 10, The configuration of the present invention is significantly different from the above-described embodiment in that it includes a projection lever 30b which is movable to protrude downward or retreat upward.

In addition, the position detection device according to another embodiment of the present invention in conjunction with the projection lever 30b is a position including the above-described support bracket 58, the operating plate 59 and the micro switch (MICRO SWITCH) 55 It consists of a detector 50, but the position detector 50 has a truck at a predetermined position in the base portion 42 of the cradle 40, which is in contact with the protruding lever 30b, that is, in the driving position of the cradle 40. Installed at a predetermined position corresponding to the position of the protruding lever 30b of the assembly 30, the electrical indicating whether the breaker body 10 is in the closing position or the blocking position depending on whether the protruding lever 30b is in contact Provide a position detection signal.

On the other hand, with reference to Figures 10 to 11 will be described the opening and closing position detection operation of the position detector according to another embodiment of the present invention.

10, the terminal portions 41a and 41b of the cradle 40 of the vacuum circuit breaker and the main body side terminal portions of the circuit breaker body 10 (see numerals 10b and 10c of FIG. 9) are connected. When the operation position and the operation position of the circuit breaker main body 10 are the closing position (a state in which the movable contactor inside the vacuum interrupter is in contact with the fixed contactor), the link of the opening / closing mechanism of the circuit breaker main body 10 of the above-not shown is not shown. The landing lever 30b which is connected and interlocks and descends so as to protrude downward from the bottom of the truck assembly 30.

Then, the first plate part 51 of the position detector is pushed downward by the projection lever 30b to descend.

Accordingly, as the second plate portion 54 connected to the lower portion of the first plate portion 51 descends, the operation lever 55a is pressed, and the micro switch 55 is closed while the internal contact of the micro switch 55 is closed. A position detection signal is issued which indicates that the current vacuum circuit breaker, that is, the operating position of the breaker main body 10 is the closing position.

The position detection signal includes an operating position of the circuit breaker, that is, the circuit breaker main body 10, as an input position to the user (administrator) through an indication or alarm device that is located near or far from the vacuum circuit breaker, including an outer surface display of the switchboard. Used to represent.

11, the terminal portions 41a and 41b of the cradle 40 of the vacuum circuit breaker and the main body side terminal portions of the circuit breaker body 10 (see numerals 10b and 10c in FIG. 9) are connected. When the operation position and the operating position of the circuit breaker main body 10 are the blocking position (the movable contact inside the vacuum interrupter is separated from the fixed contactor), the link of the opening / closing mechanism of the circuit breaker main body 10 of the above-mentioned illustration is not shown. The landing lever 30b which is connected and interlocks raises in the truck assembly 30.

Then, pressurization of the downward direction is stopped by the projection lever 30b in which the first plate portion 51 of the position detector is raised.

Therefore, the first plate portion 51 and the second plate portion 54 are released by the elastic force of the return spring 56 to release the operation lever 55a, and thus the internal contact of the micro switch 55 opens and the micro The switch 55 emits a position detection signal indicating that the current vacuum circuit breaker, that is, the operating position of the breaker body 10 is the blocking position.

The position detection signal includes a display circuit of the circuit breaker, that is, an operation position of the circuit breaker main body 10, as a blocking position to a user (administrator) through a display or alarm device that is located near or far from the vacuum circuit breaker, including an outer surface display of the switchboard. Used to represent.

10: breaker main body 10a: main circuit
10b, 10c: main body side terminal
10d: front control panel 20: girder assembly
20a: support bar 30: truck assembly
30a: rear end projection 30b: projection lever
31a: Handle end 32: Wheels
40: cradle 41a, 41b: terminal portion
42: lower base portion
43: side plate 44: guide rail
50: position detector 51: first edition
51a: slope 51b: flat
51c: balance extension 51d: lower extension
52: top 52a: second guide tube
52b: first guide pipe part 53: side plate
53a: guide slit part 54: second edition
54a: connection part 54b: guide shoe
54c: bending section 54d: upper guide stone section
55: microswitch 55a: operating lever
55b: set screw 56: return spring
58: support bracket 59: action plate

Claims (10)

In the position detector for a vacuum circuit breaker,
A support bracket fixed to the vacuum circuit breaker and having a top plate and a pair of side plates for supporting the top plate at a lower side thereof;
A first plate portion which is supported by the support bracket so as to be lifted and lowered from the upper plate of the support bracket, and a second plate portion which is connected between the first plate portion and is liftable together and positioned between both side plates of the support bracket. Working plate with; And
It has an operating lever extending into the lifting trajectory of the second plate portion of the working plate to receive the mechanical contact opening and closing driving force, and is fixed to the support bracket to provide an electrical position detection signal of the vacuum circuit breaker according to whether the second plate portion is pressed. Micro-switch (MICRO SWITCH) for emitting; position detector for a vacuum circuit breaker comprising a. The method of claim 1,
A return spring having one end supported on the upper plate of the support bracket and the other end supported on the first plate of the working plate, and applying an elastic force to the working plate to move to a position releasing the operating lever of the micro switch. Position detector for a vacuum circuit breaker further comprising. The method of claim 1,
Both side plates of the support bracket each have a guiding slit (GUIDING SLIT),
The second plate portion of the working plate is provided with a pair of guide shoes (GUIDING SHOES) extending from both sides to be inserted into the guide slit portion so that the lifting movement is guided by the guide slit portion. Position detector for circuit breakers. The method of claim 1,
And the second plate portion of the working plate has a lower bent portion to press or release the operation lever of the micro switch. The method of claim 1,
The first plate portion of the working plate further includes a balance extension that extends downward to balance the lifting movement of the first plate portion,
The top plate of the support bracket further comprises a guide tube for guiding the lifting movement of the balance extension portion position detector for a vacuum circuit breaker. A cradle having a terminal portion connected to an external power supply and load side circuit and providing a supporting base, an operation position connected to the terminal portion of the cradle, and a test position or a separation position separated from the terminal portion of the cradle. A circuit breaker body having a main body terminal portion and a vacuum interrupter for circuit opening and closing, and a truck assembly having a truck assembly (TRUCK ASSEMBLY) which is capable of loading the breaker body and moving to the operation position, test position or separation position in the cradle. As
An electrical position detection signal indicating whether a vacuum circuit breaker is located at the driving position according to whether or not the truck assembly is in contact with the truck assembly when the main body terminal portion of the breaker body is in a driving position, It includes a position detecting device for providing,
The position detection device,
A support bracket fixed to a predetermined position among the cradles, the support bracket having a top plate and a pair of side plates supporting the top plate from below;
A first plate portion supported by the support bracket so as to be liftable and protruding upward from the top plate of the support bracket and contacting the truck assembly, and being movable together by being connected to the first plate portion and between both side plates of the support bracket. A working plate having a second plate portion located at; And
It has an operating lever extending into the lifting trajectory of the second plate portion of the working plate to receive the mechanical contact opening and closing driving force, and is fixed to the support bracket to provide an electrical position detection signal of the vacuum circuit breaker according to whether the second plate portion is pressed. Micro-switch (MICRO SWITCH) for emitting; position detector for a vacuum circuit breaker comprising a. delete 7. The method according to claim 1 or 6,
The first plate portion of the working plate,
A position detector for a vacuum circuit breaker, comprising an inclined surface portion and a flat portion. A cradle (CRADLE) having a terminal portion connected to an external power supply and a load side circuit and providing a supporting base; A main terminal portion having an operation position connected to the terminal portion of the cradle, a test position or a separation position separated from the terminal portion of the cradle, a vacuum interrupter for circuit opening and closing, a closing position for closing the circuit and a breaking position for opening the circuit; Having a breaker body; A vacuum circuit breaker having a truck assembly (TRUCK ASSEMBLY) which loads the circuit breaker body and is movable in the cradle to the operating position, the test position or the separating position, wherein the position detector for the vacuum circuit breaker comprises:
A landing lever connected to the breaker body in the truck assembly and movable to protrude downwardly or retreat upwardly according to the closing position or blocking position of the breaker body in the driving position; And
Is installed in a predetermined position corresponding to the position of the haul lever of the truck assembly in the driving position of the cradle so as to be in contact with the haul lever, whether the breaker body is in the closing position in accordance with the contact of the haul lever Or a position detecting device for providing an electrical position detecting signal indicating whether the cut-off position is present.
The position detection device,
A support bracket fixed to a predetermined position among the cradles, the support bracket having a top plate and a pair of side plates supporting the top plate from below;
A first plate portion supported by the support bracket so as to be elevated and lowered, protruding upward from an upper plate of the support bracket to be in contact with the protruding lever, and being movable together with the first plate portion to be lifted together; A working plate having a second plate portion located at; And
It has an operating lever extending into the lifting trajectory of the second plate portion of the working plate to receive the mechanical contact opening and closing driving force, and is fixed to the support bracket and the breaker body is in the closing position depending on whether the second plate portion is pressed or not. And a micro switch (MICRO SWITCH) which emits an electrical position detection signal indicating whether it is in the blocking position. delete

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