KR20130000281A - Position detecting apparatus for pull-out pype circuit breaker - Google Patents

Abstract

PURPOSE: A location detection device of a draw-out type circuit breaker is provided to implement the miniaturization of the location detection device by detecting location information about a connection location, a test location, and a separation location of a breaker body with a simple structure of a permanent magnet and a magnetic field sensor. CONSTITUTION: A cradle(10) supports a breaker body. The cradle includes a connector(11) and a magnetic field sensor(12). The magnetic field sensor includes a first magnetic field sensor, a second magnetic field sensor, and a third magnetic field sensor. The connector includes a first signal line, a second signal line, and a third signal line. A through slot unit(10a) is formed on the cradle along a movement trace of an power receiving member(40).

Description

POSITION DETECTING APPARATUS FOR PULL-OUT PYPE CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawout circuit breaker and, more particularly, to a position detection device of a drawout circuit breaker having a simple configuration.

The draw-out circuit breaker is separated from the cradle (CRADLE) constituting the enclosure of the draw-out circuit breaker, having a terminal portion connected to an external power supply and load-side line, and the connection position connected to the terminal portion of the cradle and the terminal portion of the cradle. It is possible to move forward or backward to the test position where control power is supplied for the control, or to the disconnection position which is also separated from the terminal of the cradle and the supply of control power is stopped, and receives the driving force for the movement. Circuit breaker comprising a blocking base unit having a power receiving member whose position changes according to. Here, the blocking main body includes a movable contactor and a fixed contactor provided for each of the three phase AC phases, a switching mechanism for opening and closing the movable contactor, a extinguishing mechanism for arc extinguishing, a control unit, and the like.

Such drawout circuit breakers have high convenience in maintenance compared to fixed circuit breakers, and have recently been used in water distribution apparatuses of high capacity electric power consumers.

The present invention relates to such a draw-out circuit breaker, and in particular, the means for detecting the position according to the displacement of the main body, such as the connection position, the test position and the disconnection position as described above is a power distribution monitoring device, such as a monitoring function It is essential to provide the position (state) information of the current draw-out circuit breaker to the equipped switchboard.

For the position detecting device of the drawer type circuit breaker according to the prior art, reference can be made to the registered publication of Korean Patent Registration No. 10-1026314 (name of the invention: the position detecting device of the breaker) registered by the applicant of the present invention.

The position detection device of the drawer type circuit breaker according to the related art connects a power transmission mechanism to a drive shaft interlocked with a drive spindle for driving the blocking body, and outputs an electrical position detection signal in response to mechanical signal transmission of the power transmission mechanism. Microswitches were configured. In particular, the rotary plate is provided with a connection groove connected to the drive shaft, the slide operating plate is connected to the rotating plate and slides in a horizontal direction (slide), and the opening and closing signal is emitted in accordance with the mechanical contact or release according to the position of the moving slide operation plate It is composed of a large number of mechanical components such as a micro switch and a support base for supporting these components. Therefore, the overall volume is large and there is a considerable problem in manufacturing cost according to the assembly of many components. In addition, there is a problem that there is a possibility of detection error due to wear caused by repeated mechanical friction.

Accordingly, the present invention solves the problems of the prior art, and an object of the present invention is to provide a position detection apparatus of a draw-out circuit breaker that is small in size, simple in configuration, low in manufacturing cost, and capable of detecting a position without occurrence of mechanical wear. .

The object of the present invention is a cradle (CRADLE) having a terminal portion connected to an external power source and a load-side line, the connection position is connected to the terminal portion of the cradle and the terminal portion of the cradle, but the control power for the test is supplied A power that can move forward or backward to a separate position from the test position or the terminal portion of the cradle and stops supplying control power, receives a driving force for movement, and changes its position according to the connection position, the test position, and the disconnection position. It has a blocking main body having a receiving member, rotatably axially supported on the side plate of the cradle and having a cam slot for transmitting a driving force by sandwiching the power receiving member of the blocking main body, the connection position, the test position and Draw-out circuit breaker including drive cam rotated to change rotation angle according to separation position As, in the position detecting device of the draw-out type circuit breaker,

Permanent magnets correspondingly displaced according to the connection position, the test position and the separation position of the blocking base body;

A first magnetic field sensor for detecting the connection position, which detects a magnetic field of the permanent magnet and emits a connection position detection signal when the blocking main body is located at the connection position;

A second magnetic field sensor for detecting the test position, which detects a magnetic field of the permanent magnet and emits a test position detection signal when the blocking main body is located at the test position; And

A third magnetic field sensor for detecting a separation position for detecting a magnetic field of the permanent magnet and emitting a separation position detection signal when the blocking main body is located at the separation position; It can be achieved by providing a position detection device of the draw-out circuit breaker according to the present invention comprising a.

The position detecting device of the drawout circuit breaker according to the present invention detects the connection position detection signal and the test position according to the position of the permanent magnet and the corresponding permanent magnet which are correspondingly displaced according to the movement of the connection position, the test position, and the separation position of the main body. It is composed of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor which emits the signal and the separated position detection signal, respectively. It is possible to detect the positional information about the position, and thus the volume of the position detection apparatus can be miniaturized, manufacturing cost is low, and it is not the detection structure by the mechanical power transmission, but the position detection configuration by the detection of the magnetic field, so that there is no mechanical wear. The position detection effect can be obtained.

In the position detecting device of the draw-out circuit breaker according to the present invention, the permanent magnet is installed in a drive cam whose rotation angle changes according to the position of the blocking main body, and the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor When the drive cam is rotated at a rotation angle corresponding to the connection position, test position, and separation position of the blocking body, respectively, it is installed at a predetermined position to detect the magnetic field of the permanent magnet. According to the rotation angle of the drive cam provided in the circuit breaker, any one of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor can detect the magnetic field to easily detect the position of the corresponding blocking main body. You can get it.

In the position detecting device of the draw-out circuit breaker according to the present invention, the permanent magnet is installed in the power receiving member whose position changes according to the position of the blocking main body, and the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are When the power receiving member moves to a position corresponding to the connection position, the test position, and the separation position of the blocking body, respectively, it is installed at a predetermined position that can detect the magnetic field of the permanent magnet, and thus the draw-out type corresponding to the position of the blocking body is According to the movement position of the power receiving member provided in the circuit breaker, any one of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor can detect the magnetic field to easily detect the position of the corresponding blocking main body. Can be obtained.

The position detection device of the drawout circuit breaker according to the present invention includes a first signal line for transmitting a connection position detection signal from a first magnetic field sensor, a second signal line for transmitting a test position detection signal from a second magnetic field sensor, A third signal line for transmitting the separation position detection signal from the third magnetic field sensor, and further comprising a connector for transmitting the connection position detection signal, the test position detection signal, and the separation position detection signal to the controller or the host device; Therefore, the signal wiring can be simplified and the wiring can be arranged.

The position detecting device of the draw-out circuit breaker according to the present invention further includes an overcurrent relay having a display portion connected to the connector for receiving a connection position detection signal, a test position detection signal and a separation position detection signal and indicating the position of the blocking base body. It is possible to display the current position of the draw-out circuit breaker (blocking main body) externally through the over-current relay and the display unit attached thereto, thereby preventing the electrical safety accident in the user operating the circuit breaker on and off. You can get the effect.

In the position detection device of the draw-out circuit breaker according to the present invention, since the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are constituted by a Hall sensor, the Hall sensor can be conveniently used as a magnetic field sensor on the market. By procuring, it is possible to obtain the effect of manufacturing the position detecting device of the drawout circuit breaker.

In the position detection device of the draw-out circuit breaker according to the present invention, a THROUGH SLOT PORTION is formed on the cradle along the trajectory of the power receiving member. The first magnetic field sensor, the second magnetic field sensor, and the first magnetic field sensor are formed. 3 Since the magnetic field sensor is installed at a predetermined position around the through slot part, the magnetic field sensors can be easily installed at a position corresponding to the movement of the permanent magnet installed in the power receiving member, thereby obtaining the effect of detecting the position of the blocking body. have.

1 is a schematic state diagram showing a state where a draw-out circuit breaker is located at a connection position,
Figure 2 is a schematic state diagram showing a state that the draw-out circuit breaker is located in the test position,
3 is a schematic state diagram showing a state in which the draw-out circuit breaker is located in the separation position,
4 is an operational state diagram showing the positions of the drive cam, the power receiving member and the permanent magnet when the blocking body is in the connecting position;
5 is an operation state diagram showing the positions of the drive cam, the power receiving member and the permanent magnet when the blocking main body is the test position;
6 is an operational state diagram showing the positions of the drive cam, the power receiving member and the permanent magnet when the blocking body is in the disengaged position;
7 is a block diagram showing the installation position of the power receiving member and the magnetic field sensor and the connector in the draw-out circuit breaker according to the present invention,
8 is a functional block diagram showing the electrical configuration of the position detection device of the draw-out circuit breaker according to the present invention.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

1 is a schematic state diagram showing a state in which the draw-out circuit breaker is located in the connection position, Figure 2 is a schematic state diagram showing a state in which the draw-out circuit breaker is located in the test position, Figure 3 is a draw-out circuit breaker is located in the separation position Figure 4 is a schematic state diagram showing the state, Figure 4 is an operating state diagram showing the position of the drive cam and the power receiving member and the permanent magnet when the blocking body is in the connecting position, Figure 5 is the drive cam and power receiving member when the blocking body is the test position. And an operational state diagram showing the position of the permanent magnet, FIG. 6 is an operational state diagram showing the positions of the drive cam, the power receiving member, and the permanent magnet when the blocking main body is the separated position, and FIG. 7 is a drawing circuit breaker according to the present invention. Figure 8 is a configuration diagram showing the installation position of the drive cam and the magnetic field sensor and the connector, Figure 8 is a top of the draw-out circuit breaker of the present invention It is a functional block diagram showing the electrical configuration in the detection device.

Referring to Figures 1 to 7 will be described first the configuration of the draw-out circuit breaker is installed position detection apparatus according to the present invention.

As shown, the draw-out circuit breaker in which the position detection device according to the present invention is installed includes a blocking main body 20 and a cradle 10 supporting the blocking main body 20.

1 to 3, the cradle 10 has a terminal portion C2 connected to an external power supply and load side line. 1 to 3, reference numeral C1 denotes a control unit power supply terminal for supplying power to the control unit power supply terminal 20a of the blocking base body 20, and reference numeral 1 denotes a front control panel provided with an operation unit in the blocking base body 20. Reference numeral 20b designates a main circuit terminal of the blocking main body 20 that can be connected to or separated from the terminal portion C2, and reference numeral H1 denotes a contact position (positioning position) of the movable contact in the blocking basic body 20; It indicates a charging operation handle of the input spring that provides the operating energy, and the sign PL is installed to be connected between the blocking body 20 and the cradle 10 to guide the inlet and out of the blocking body 20. Instruct the guide rail.

As can be seen in FIG. 7, which shows the configuration of the cradle 10 in more detail, the cradle 10 includes both side plates of which the front side (right side) is opened, and the terminal portion at the rear side (symbol C2 in FIG. 1). And a lower manual pull-out operation part such as a spindle (see reference numeral 60 in Fig. 4) and a front connection port for pull-out operation of the blocking body (see reference numeral 20 in Fig. 1).

 As can be seen from Figure 1 to Figure 3, the blocking body 20 is connected to the position (shown in Figure 1), the test position (position shown in Figure 2), the separation position (shown in Figure 3) Forward or backward movement). Here, the connection position (the position shown in FIG. 1) is a position at which the main circuit terminal 20b of the blocking main body 20 is connected to the terminal portion C2 of the cradle 10.

The test position (the position shown in FIG. 2) is separated from the terminal portion C2 of the cradle 10, but the control power for the test is controlled from the control power supply terminal C1 to the control power supply terminal 20a of the blocking main body 20. It is supplied to a control unit (not shown) to give a trip control signal to an actuator (ACTUATOR, not shown) to test whether the opening / closing mechanism is normally tripped.

The separation position (position shown in FIG. 3) is that the main circuit terminal 20b of the blocking main body 20 is also separated from the terminal portion C2 of the cradle 10 and the control power supply terminal C1 of the cradle 10 is separated from the main circuit terminal 20b. The control unit power supply terminal 20a of the blocking main body 20 is also separated and the supply of control power is also stopped.

Although not shown in the blocking body 20, a movable contactor and a fixed contactor provided for each of the three phase AC phases as well known, a switching mechanism for opening and closing the movable contactor, a extinguishing mechanism for arc extinguishing, a control unit, etc. Is provided.

As shown in FIGS. 4 to 6, which show the configuration and operating state of the drive mechanism for drawing in and drawing out, the blocking body 20 receives the driving force for movement and the connection position, the test position, and the separation. It has a power receiving member 40 whose position varies with position. The power receiving member 40 may be specifically configured as a roller (ROLLER) that is rotatably supported on both sides of the blocking base 20.

On the other hand, with reference to Figures 4 to 6 the blocking body 20 will be described the configuration of the drive mechanism for the intake and withdrawal.

 The drive mechanism for the insertion and withdrawal of the blocking main body 20 includes a spindle 70, a moving plate 60, a pinion gear 50, a driving cam 30 as shown in the drawing. .

The spindle 70 is a shaft-shaped member in which a screw surface is formed on the surface and a connector for operating a handle is provided on the front portion (right end in the drawing).

The moving plate 60 has a vertical surface portion and a horizontal surface portion, and the vertical surface portion is screwed to the spindle 70 so that the moving plate 60 moves forward and backward along the screw surface of the spindle 70 when the spindle 70 rotates. It is movable in the left and right directions on the top, and a rack gear portion is formed in the horizontal surface portion.

The pinion gear 50 is rotatable on the gear shaft which is geared with the rack gear portion of the movable plate 60 and supported by the side plate of the cradle 10.

 The driving cam 30 is a means for driving the power receiving member 40 of the circuit breaker body 20 while being rotated by a driving force from the pinion gear 50 and includes a gear portion 32 And is rotatably pivotally supported on a side plate of the cradle 10. The drive cam 30 has a cam groove portion 31 which transmits a driving force by sandwiching the power receiving member 40 of the blocking base 20 on the other side, and at the connection position, the test position and the separation position. Rotate to change the rotation angle accordingly.

On the other hand, the mechanical configuration of the position detection device of the draw-out circuit breaker according to a preferred embodiment of the present invention will be described with reference to FIGS.

The position detecting device of the drawout circuit breaker according to the preferred embodiment of the present invention includes a permanent magnet 33 and a magnetic field sensor 12.

Here, the magnetic field sensor 12 may include the first magnetic field sensor MF1, the second magnetic field sensor MF2, and the third magnetic field sensor MF3 as shown in FIG. 8.

According to a preferred embodiment, the first magnetic field sensor MF1, the second magnetic field sensor MF2 and the third magnetic field sensor MF3 may be configured as a Hall sensor.

The permanent magnet 33 is correspondingly displaced according to the movement of the connection position, the test position and the separation position of the blocking body 20 as can be seen with reference to FIGS. In other words, the permanent magnet 33 is installed on one side of the drive cam 30 in accordance with a preferred embodiment of the present invention can be rotated together in accordance with the rotation of the drive cam (30).

According to another embodiment of the present invention, the permanent magnet may be installed in the power receiving member 40.

Referring to FIG. 7, a THROUGH SLOT PORTION 10a is disposed on the cradle 10 (more specifically, on the side plate of the cradle) along the trajectory of the power receiving member 40. The first magnetic field sensor MF1, the second magnetic field sensor MF2, and the third magnetic field sensor MF3 are installed at predetermined positions around the through slot part 10a.

The first magnetic field sensor MF1 detects a magnetic field of the permanent magnet when the blocking base body is located at the connection position and emits a connection position detection signal. As shown in FIG. 7, the first magnetic field sensor MF1 is a permanent magnet 33 when the driving cam 30 or the power receiving member 40 rotates at a rotation angle corresponding to the connection position of the blocking main body. It may be installed in a predetermined position of the side plate of the cradle 10 that can detect the magnetic field of the). The predetermined position at which the first magnetic field sensor MF1 is installed is a position adjacent to the upper left portion of the through slot portion 10a formed in the side plate of the cradle 10 of FIG. 7.

The second magnetic field sensor MF2 detects a magnetic field of the permanent magnet when the blocking base body is located at the test position and emits a test position detection signal. As shown in FIG. 7, the second magnetic field sensor MF2 has a permanent magnet 33 when the driving cam 30 or the power receiving member 40 rotates at a rotation angle corresponding to the test position of the blocking main body. It may be installed in a predetermined position of the side plate of the cradle 10 that can detect the magnetic field of the). The predetermined position at which the second magnetic field sensor MF2 is installed is an upper or lower position adjacent to the middle portion of the through slot portion 10a formed in the side plate of the cradle 10 of FIG. 7.

The third magnetic field sensor MF3 detects the magnetic field of the permanent magnet when the blocking base body is located at the separation position and emits a separation position detection signal. As shown in FIG. 7, the third magnetic field sensor MF3 has a permanent magnet 33 when the driving cam 30 or the power receiving member 40 rotates at a rotation angle corresponding to the separation position of the blocking main body. It may be installed in a predetermined position of the side plate of the cradle 10 that can detect the magnetic field of the). The predetermined position at which the third magnetic field sensor MF3 is installed is a position adjacent to the right end of the slot portion 10a formed in the side plate of the cradle 10 of FIG. 7.

On the other hand with reference to Figure 7 or 8, the circuit configuration of the position detection device of the draw-out circuit breaker according to a preferred embodiment of the present invention.

Referring to FIG. 8, the circuit configuration of the position detection device of the drawout circuit breaker according to the preferred embodiment of the present invention includes a magnetic field sensor 12, a connector 11, and an overcurrent relay 80. Or an upper device. Here, the host apparatus includes a monitoring panel composed of a computer installed at a remote site that receives, processes, and monitors position detection signals from a monitoring control unit or a connector 11 or a magnetic field sensor 12 of a switchboard on which a drawout circuit breaker is installed. This may be the case.

The configuration and function of the magnetic field sensor 12 are as described above.

The connector 11 has a first signal line PS1 for transmitting the connection position detection signal from the first magnetic field sensor MF1 and a second signal line for transmitting the test position detection signal from the second magnetic field sensor MF2. And a third signal line PS3 for transmitting the separation position detection signal from the third magnetic field sensor MF3, and connecting the connection position detection signal, the test position detection signal, and the separation position detection signal. The controller transmits the overcurrent relay 80 of the circuit breaker or the host device. As is well known, the connector 11 is provided with connection conductors at one side of the plurality of pin holes, connected to signal lines PS1, PS2, and PS3, and output signal lines are connected to the other side, and the outside of the artificial resin material electrical insulator. It may consist of a member commonly referred to as a wrapped so-called connector.

The overcurrent relay 80 is a part corresponding to the control unit in the drawout circuit breaker, and may include a processor for signal processing and control, a display unit for displaying the position of the blocking main body, and the like. The overcurrent relay 80 is connected to the connector 11 to receive, process, and control the connection position detection signal, the test position detection signal, and the separation position detection signal through signal lines PS1, PS2, and PS3. It is possible to display the position of the blocking main body through the display unit.

The operation of the position detection device of the draw circuit breaker according to the preferred embodiment of the present invention configured as described above will be described with reference to FIGS.

The introduction into the connection position of FIG. 4 from the test position or the disconnect position as shown in FIGS. 2 to 3 and 5 to 6 and the position detection operation according thereto will be described.

When the user connects the operation handle, which is not shown by the user, to the spindle 70 provided with the connection hole of the operation handle, and rotates it in a clockwise direction, the vertical surface portion of the movable plate 60 is screwed to the spindle 70 to rotate the spindle 70. In accordance with the clockwise rotation of), the moving plate 60 moves forward along the threaded surface of the spindle 70 (rightward in FIG. 4).

Then, as the rack gear portion formed on the horizontal surface portion of the moving plate 60 moves to the right direction, the pinion gear 50 engaged with the rack gear portion rotates counterclockwise.

Accordingly, the drive cam 30 in which the pinion gear 50 and the gear portion 32 are engaged is pulled by the cam groove portion 31 while the power receiving member 40 is rotated clockwise.

Thus, as shown in FIG. 1, the blocking base body (see 20 in FIG. 1) coupled with the power receiving member 40 is drawn to the terminal side (left in FIG. 4) of the cradle 10.

The main circuit terminal 20b of the blocking main body 20 is connected to the terminal portion C2 of the cradle 10, and at the same time, the control power supply terminal C1 of the cradle 10 and the control power supply terminal 20a of the blocking main body 20. ) Is connected, the main circuit is also a closed circuit, the power circuit between the power supply and the load side is connected, and the control unit of the blocking main body 20 is also in a state of supplying power.

In this case, as shown in FIG. 7, as the permanent magnet 33 installed in the power receiving member 40 or the driving cam 30 moves to the left in the drawing, a through slot part formed in the side plate of the cradle 10 ( In 10a), the first magnetic field sensor MF1 located near the upper left portion detects the magnetic field of the permanent magnet 33 and emits a connection position detection signal.

The connection position detection signal is transmitted to the overcurrent relay 80 and / or the host device through the first signal line PS1 and the connector 11. Accordingly, the overcurrent relay 80 and / or the host apparatus determines that the current blocking base body 20 is currently located at the connection position by the received connection position detection signal, and performs an indicator light processing.

Next, the withdrawal from the connection position as shown in Figs. 1 and 4 to the test position in Figs. 2 and 5 and the position detection operation according thereto will be described.

When the user connects the operation handle, which is not shown by the user, to the spindle 70 provided with the connection hole of the operation handle, and rotates it counterclockwise, the vertical surface portion of the movable plate 60 is screwed to the spindle 70 to rotate the spindle ( According to the counterclockwise rotation of 70, the moving plate 60 moves rearward (leftward in FIG. 5) along the threaded surface of the spindle 70.

Then, the pinion gear 50 meshed with the rack gear portion rotates clockwise as the rack gear portion formed on the horizontal surface portion of the movable plate 60 moves to the left direction.

Accordingly, the drive cam 30, in which the pinion gear 50 and the gear portion 32 are engaged, rotates in the counterclockwise direction and pushes the power receiving member 40 to the right by the cam groove portion 31. FIG.

Accordingly, the blocking base body 20 (see reference numeral 20 in FIG. 2) coupled with the power receiving member 40 is pushed to the right in FIG. 5 from the terminal side of the cradle 10 as shown in FIG. 2. The main circuit terminal 20b of) is separated from the terminal portion C2 of the cradle 10 and the control power supply terminal C1 of the cradle 10 and the control power supply terminal 20a of the blocking main body 20 are connected to each other. The main circuit is opened so that the power circuit between the power supply and the load side is cut off, but power is supplied to the control unit of the blocking main body 20 so that the circuit breaker can be tested.

In this case, as shown in FIG. 7, as the permanent magnet 33 installed in the power receiving member 40 or the driving cam 30 moves to the right in the drawing, a through slot part formed in the side plate of the cradle 10 ( In 10a), the second magnetic field sensor MF2 located at the position adjacent to the middle portion detects the magnetic field of the permanent magnet 33 and emits a test position detection signal.

Such a test position detection signal is transmitted to the overcurrent relay 80 and / or the host apparatus through the second signal line PS2 and the connector 11 as can refer to FIG. 8. Therefore, the overcurrent relay 80 and / or the host apparatus determines that the current blocking base body 20 is located at the test position by the received test position detection signal, and performs an indicator light processing.

Finally, the withdrawal from the test position as shown in Figs. 2 and 5 to the separation position of Figs. 3 and 6 and the position detection operation according thereto will be described.

When the user connects the operation handle, which is not shown by the user, to the spindle 70 provided with the connection hole of the operation handle, and further rotates counterclockwise, the vertical surface portion of the movable plate 60 is screwed to the spindle 70 to rotate the spindle. As the counterclockwise rotation of 70 moves, the moving plate 60 further moves rearward (leftward in FIG. 5) along the threaded surface of the spindle 70.

Then, the pinion gear 50 engaged with the rack gear portion further rotates clockwise as the rack gear portion formed on the horizontal surface portion of the movable plate 60 moves further to the left direction.

Accordingly, the drive cam 30 meshing with the pinion gear 50 further pushes the power receiving member 40 to the right side by the cam groove portion 31 while further rotating in the counterclockwise direction.

Accordingly, the blocking base body 20 (see reference numeral 20 in FIG. 3) coupled with the power receiving member 40 is pushed to the right side in FIG. 6 from the terminal side of the cradle 10 as shown in FIG. 3. At the same time as the main circuit terminal 20b of the cradle 10 is separated from the terminal portion C2 of the cradle 10, the control power supply terminal C1 of the cradle 10 is also separated from the control power supply terminal 20a of the blocking main body 20. The main circuit is opened to cut off the power circuit between the power supply and the load side, and the power supply is also interrupted to the control unit of the blocking main body 20 so that the test of the circuit breaker is impossible.

In this case, as shown in FIG. 7, the through-slot part formed in the side plate of the cradle 10 as the permanent magnet 33 installed in the power receiving member 40 or the drive cam 30 moves to the upper right side in the drawing. In 10a, the third magnetic field sensor MF3 located at the position adjacent to the right end detects the magnetic field of the permanent magnet 33 and emits a separation position detection signal.

As shown in FIG. 8, the separation position detection signal is transmitted to the overcurrent relay 80 and / or the host apparatus through the third signal line PS3 and the connector 11. Accordingly, the overcurrent relay 80 and / or the host apparatus determines that the current blocking main body 20 is currently located at the separation position by performing the separation position detection signal received, and performs an indicator light processing.

1: front panel 10: cradle
10a: through slot portion 11: splice
12: magnetic field sensor
20: blocking main body 20a: control unit power supply terminal
20b: main circuit terminal 30: drive cam
31: cam groove part 32: gear part
33: permanent magnet 50: pinion gear
60: moving plate 70: spindle
80: overcurrent relay

Claims (7)

Cradle CRADLE having a terminal portion connected to an external power supply and load side line, a connection position connected to the terminal portion of the cradle and a test position separated from the terminal portion of the cradle but supplied with control power for the test, or the cradle A blocking base body having a power receiving member which is separated from the terminal part and which can be moved forward or backward to a separation position where the supply of control power is also stopped, receives a driving force for movement, and whose position changes according to the connection position, test position and separation position; And a cam groove that is rotatably supported on the side plate of the cradle and has a cam slot for transmitting driving force by sandwiching the power receiving member of the blocking main body therebetween. For a draw-out circuit breaker comprising a drive cam rotatably changed, said draw-out type In the short-term Rocha position detecting device,
Permanent magnets correspondingly displaced according to the connection position, the test position and the separation position of the blocking base body;
A first magnetic field sensor for detecting the connection position, which detects a magnetic field of the permanent magnet and emits a connection position detection signal when the blocking main body is located at the connection position;
A second magnetic field sensor for detecting the test position, which detects a magnetic field of the permanent magnet and emits a test position detection signal when the blocking main body is located at the test position; And
A third magnetic field sensor for detecting a separation position for detecting a magnetic field of the permanent magnet and emitting a separation position detection signal when the blocking main body is located at the separation position; Position detection device of the draw-out circuit breaker comprising a. The method of claim 1,
The permanent magnet is installed in the drive cam,
The first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor may respectively detect the magnetic field of the permanent magnet when the driving cam is rotated at a rotation angle corresponding to the connection position, the test position, and the separation position of the blocking main body. A device for detecting a position of a pull-out circuit breaker, characterized in that it is installed at a predetermined position. The method of claim 1,
The permanent magnet is installed in the power receiving member,
The first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor may detect the magnetic field of the permanent magnet when the power receiving member moves to a position corresponding to the connection position, the test position, and the separation position of the blocking main body, respectively. A device for detecting a position of a pull-out circuit breaker, characterized in that it is installed at a predetermined position. The method of claim 1,
A first signal line for transmitting the connection position detection signal from the first magnetic field sensor, a second signal line for transmitting the test position detection signal from the second magnetic field sensor, and the separation position from the third magnetic field sensor And a connector for connecting a third signal line for transmitting a detection signal, and for transmitting the connection position detection signal, the test position detection signal, and the separation position detection signal to a controller or a higher level device. Position detection device of circuit breaker. 5. The method of claim 4,
And an overcurrent relay connected to the connector, the overcurrent relay having a display portion for receiving the connection position detection signal, the test position detection signal, and the separation position detection signal, and for indicating the position of the blocking main body. Position detection device. The method of claim 1,
The first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are Hall sensors (HALL SENSOR) characterized in that the position detection device of the circuit breaker. The method of claim 1,
A THROUGH SLOT PORTION is formed on the cradle along the trajectory of the power receiving member, and the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor are pre-determined around the through slot portion. Position detection device of the draw-out circuit breaker, characterized in that installed in the position.

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