KR20080084580A - Remote operation device of a circuit breaker - Google Patents

Abstract

A remote operation device of a circuit breaker is provided to convert a handle of the circuit breaker easily and manually without repulsive force from a permanent magnet. A remote operation device(2) of a circuit breaker(1) includes an electronic linear actuator. The electronic linear actuator is composed of a stator(12) and a mover(13). The stator has a pair of bar-shaped permanent magnets(12b) embedded in a mover guide pipe(12a), wherein the pair of bar-shaped permanent magnets are magnetized to different polarities and arranged in series. The mover movably guides and supports an operation coil(13a) along the guide pipe. The mover is connected to a handle(1a) of the circuit breaker and then a direction of exciting current conducted to the operation coil is selectively converted so that the handle of the circuit breaker is converted.

Description

Remote operation device of a circuit breaker

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote operation device of a circuit breaker which is attached to circuit breakers such as a circuit breaker and an earth leakage breaker and switches the handle of the breaker to the ON, OFF and RESET positions by a remote command.

The circuit breaker of the head base used as a component of the low voltage power distribution facility is equipped with a switchboard, a control panel, etc., and is centrally managed. The circuit breaker is turned on by a remote command (electric signal) as an external accessory (optional). It is well known a remote control device which switches to the OFF, RESET and RESET positions. In addition, instead of the conventional electric drive system combining a drive motor, a reduction gear, and a feed screw mechanism, this remote control device has already commercialized a remote control device that employs an electronic linear actuator to directly drive a handle of a circuit breaker. It is well-known (for example, refer patent document 1).

Next, the structure and operation | movement of a circuit breaker and the remote control apparatus disclosed by patent document 1 are demonstrated in FIGS.

6 (a) to 6 (c), 1 is a circuit breaker (wiring breaker), and 2 is a remote control device mounted to the circuit breaker 1. In addition, 1a is a rocker type opening / closing operation handle which the front-end | tip protruded from the case cover 1b of the circuit breaker 1, 1c is a toggle link type opening / closing mechanism, 1d is a main circuit contact, 1e is a switching mechanism 1c. It is an overcurrent outlier device connected through a latch mechanism.

On the other hand, the remote control device 2 includes the guide rail 4 and the movable member 5 guided to the guide rail 4 inside the case 3 (the detailed structure of the mover will be described later). E It consists of a pair of stator 6 which recommended the operation coil 6b for the magnetic yoke 6a of the shape, and arrange | positioned on both sides of the movement path of the said mover 5. In the state where this remote control device 2 is attached to the circuit breaker 1, the front end of the handle 1a fits into the recess formed in the lower surface of the mover 5 and is connected to each other. In addition, 7 is a handle for manual operation provided in the said movable body 5, and 8 is an auxiliary lid provided in the front of the case 3. As shown in FIG.

The above-mentioned opening and closing operation of the circuit breaker 1 is well known. When the handle 1a is moved from OFF to ON and OFF to OFF, the handle 1a is moved. In conjunction with this, the opening / closing mechanism 1c (toggle link is reduced by the opening / closing spring) is reversed, and the main circuit contact 1d closes and opens. In addition, when the overcurrent external device 1e detects the overcurrent of the main circuit and releases the latch mechanism, the circuit breaker 1 trips, causing the main circuit contact 1d to open, and the handle 1a of the toggle link mechanism. It receives the restoring force and stops between the ON position and the OFF position to indicate the trip operation. In addition, to re-insert the main circuit contact 1d after the trip operation, move the handle 1a from the TRIP position to the RESET position to reset the latch mechanism, and then turn the main circuit contact into the ON position again to close the main electrode. do.

Next, the conventional structure of the electronic linear actuator provided in the remote control device 2 will be described with reference to FIG. 7 and the operation thereof in FIGS. 8A and 8B. The mover 5 of the linear actuator connected to the handle 1a of the circuit breaker 1 (guided and supported to be movable in the ON and OFF directions according to the guide rail 4 in Fig. 6A) is As shown in FIG. 7, the permanent magnet 9 for the field is provided on the left and right sides opposite to the stator 6. On the other hand, the stator 6 of the linear actuator recommends the operation coil 6b to the center leg of the E-shaped magnetic yoke 6a, and forms the coil part. Moreover, the operation coil 6b of the stator 6 is connected to the excitation power supply via the contact of the ON and OFF operation switch 11 with which the remote control part 10 shown in FIG. 8 (a) is equipped.

In the above configuration, the remote control device 2 shown in Fig. 6 is given an operation command of ON and OFF from the remote control unit 10 (see Fig. 8 (b)), and the operation coil of the linear actuator is based on the command. When energizing the excitation current to 6b, the magnetic thrust in the direction of the arrow in Fig. 7 is established between the stator 6 and the permanent magnet 9 of the mover 5 by the excitation current in the direction corresponding to the ON and OFF commands.推力) occurs. Then, in response to the magnetic thrust, the mover 5 moves from one stroke end to the other stroke end along the guide rail 4 to turn on the rocker handle 1a of the circuit breaker 1, Switch to the OFF position. In addition, although not shown, the detection switch of ON and OFF positions is provided in the terminal position of the movement path of the mover 5, and the mover 5 turns ON and OFF at the time of the ON and OFF operation of the circuit breaker 1. As shown in FIG. When the end position is reached, the excitation of the operation coil 6b is stopped by the operation signal of the detection switch.

Patent Document 1: Japanese Patent Laid-Open No. 2002-319504 (Fig. 1, Fig. 6)

By the way, the said conventional Morimoto operation apparatus has the same problem as the following description from a structure and a function.

(1) Since the stator 6 of the electromagnetic linear actuator shown in FIG. 7 has a core attachment structure in which the operation coil 6b is recommended for the E-shaped magnetic yoke 6a, the external size of the entire remote control device is large. do.

(2) In the non-excited state of the operating coil 6b, the movable member 5 is supported at the stroke end positions corresponding to the ON and OFF positions by the magnetic attraction force acting between the permanent magnet 9 and the magnetic yoke. . For this reason, when the steering wheel 7a of the movable part 5 shown in FIG. 6 is operated manually, and the steering wheel 1a of the circuit breaker is switched, even when the operation coil 6b is unexcited like a power failure etc., The magnetic attraction force of the permanent magnet 9 described above is added as a reaction force. For this reason, manual operation requires more force than necessary.

(3) In addition, even when the circuit breaker detects an overcurrent and trips, the handle 1a connected to the mover 5 of the remote control device 2 is restrained in the ON position by the magnetic force of the permanent magnet 9. Since it is supported, the tripping state of the circuit breaker cannot be visually confirmed from this handle position.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to solve the above problems, to achieve compactness and compactness of the device with a simple structure, and to provide a large operation force that is more than necessary when switching the steering wheel by manual operation. An object of the present invention is to provide a remote operation device of a circuit breaker which is improved so that the handle of the circuit breaker is switched without the need, and the trip operation state of the circuit breaker can be confirmed from the handle position.

In order to achieve the above object, according to the present invention, a remote operation device of a circuit breaker mounted on a circuit breaker having a rocker type handle and switching the handle to an ON, OFF, RESET position, the remote operation device being electronic Including a linear actuator, connecting the mover of the electronic linear actuator to the handle of the circuit breaker, and to switch the handle of the circuit breaker by remote operation of the electronic linear actuator,

A stator having the electronic linear actuator arranged in series in a pair of rod-shaped permanent magnets magnetized in reverse polarity with each other in series, and guide-movably supporting the operation coil in accordance with the guide pipe. Consisting of an assembly of one mover, connecting the mover to the handle of the circuit breaker, and then selectively switching the excitation current flowing through the operating coil to switch the handle of the circuit breaker to the ON, OFF and RESET positions ( Claim 1) In addition, the linear actuator is specifically configured and arranged in the following aspects.

(1) The guide pipe incorporating the rod-shaped permanent magnet of the stator is a non-magnetic pipe, and the guide pipe is placed on the side of the handle of the circuit breaker, and the coil winding frame recommended for the operator's operation coil is mounted on the guide pipe. It is slidably inserted into the outer circumference and assembled, and at this assembly position, the coil winding frame is engaged with the handle of the circuit breaker (claim 2).

(2) The two sets of linear actuators described above are arranged in parallel on both sides of the handles of the circuit breakers, and the movable members of the respective linear actuators are integrally combined and then connected to the handles of the circuit breakers (claim 3). ).

The remote control device of the above configuration can move a stator having a rod-shaped permanent magnet embedded in a guide pipe for guiding the mover, and a coil winding frame recommended for an operation coil along the pipe axis using the guide pipe as a guide rail. An electronic linear actuator is constituted by a coreless voice coil motor composed of a movable guide member. Thereby, compared with the above-mentioned linear actuator with a core of the conventional structure (refer FIG. 6, FIG. 8), a structure is simple and a remote operation apparatus can be comprised compact and compact.

In addition, since the linear actuator has a coreless structure, the mover is not affected by the magnetic force of the permanent magnet of the stator in the non-excitation state of the operation coil. Therefore, even when the steering wheel is manually switched, it can be operated comfortably without receiving reaction force from the permanent magnet.

In addition, during the trip operation of the circuit breaker, since the mover of the remote control device moves to the trip display position without any restriction by the restoring force of the opening / closing mechanism, the trip operation of the circuit breaker from the stop position of the mover. The condition can be visually confirmed.

In addition, by arranging the two sets of linear actuators symmetrically arranged to connect the movers to the handles of the circuit breaker, the magnetic thrust of the two sets of linear actuators can be summed to drive the handles of the circuit breaker. It is possible to prevent the mover from rotating about the stator.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on the Example shown to FIGS. 1-5. 1 (a) is an external view of a main part of a remote control device mounted on a circuit breaker, FIG. 1 (b) is a configuration diagram schematically showing an electronic linear actuator which is a core part of the remote control device, and FIG. 3A is a top view of a case in which the remote operation device of 1 (a) is attached to the circuit breaker, FIG. 3 is a top view of the case cover of FIG. 2 being removed, and FIG. 4 is a state of removing the case sidewall of FIG. 5A and 5B are explanatory views of the operation of the electronic linear actuator.

In this embodiment, the electronic linear actuator of the remote control device 2 attached to the circuit breaker 1 is composed of a coreless voice coil motor in which a stator and a mover of the following substrate structure are combined. That is, as shown in Fig. 1 (b), the stator 12 of the electronic linear actuator is a pair of rod-shaped permanent magnets magnetized in reverse polarity in a guide pipe (hollow shaft) 12a made of nonmagnetic material ( 12b) is inserted in series. On the other hand, the mover 13 is comprised of the operation coil 13a and the coil winding frame 13b which recommended the said operation coil 13a, and the said coil winding frame 13b of the guide pipe 12a mentioned above. It is fitted to the outer circumference and guided so as to be slidable in the axial direction of the pipe.

When the excitation current is energized through the operation coil 13a in the above-described configuration, the electromagnetic thrust acts between the permanent magnet 12b of the stator 12 and the operation coil 13a of the mover 13 in correspondence with the current direction. In response to the electromagnetic thrust, the coil winding frame 13b of the movable element 13 slides in the direction of the arrow P in FIGS. 1A and 1B along the guide pipe 12a. 1B shows a state in which the movable element 13 is stopped at the center position of the moving stroke with the operation coil 13a as the non-excitation.

Then, in the remote control device 2 of the illustrated embodiment, two sets of the above-described electronic linear actuators are combined left and right and arranged on the side of the handle 1a of the circuit breaker 1 (Fig. 1 (a), Fig. 1). 3) In this position, the coil winding 13b of the movable element 13 is connected to the handle 1a of the circuit breaker 1 as described below. That is, the stator 12 of each set is assembled to the case 3 of the remote control apparatus 2 via the end plate 12c couple | bonded with the both ends of the guide pipe 12a, and this case 3 is connected to a circuit. It is fixed to a predetermined position by screwing into the upper surface of the cover of the circuit breaker (1). Moreover, the window hole 3a is opened in the upper surface of the case 3, The position of the handle 1a and the switching operation of the handle 1a by manual are performed through this window hole 3a. On the other hand, the movable element 13 integrally couples the coil winding frames 13b of each pair through the U-shaped connecting plate 13c, and then engages with each other the engaging holes (each opening) at the bottom center of the connecting plate 13c. A hole is fitted into the tip of the handle 1a of the circuit breaker 1 to connect the handle / operator.

Next, the operation of the remote control device 2 having the above configuration will be described. When the handle 1a of the circuit breaker 1 is switched to the ON, OFF, and RESET positions, the operation coil 13a of the electronic linear actuator is controlled by an external command as in the remote control unit 10 shown in FIG. ) Energizes the excitation current.

Here, in switching the steering wheel 1a to OFF (refer FIG. 8 (b)), the exciting current which energizes the operation coil 13a flows in the direction of FIG. 5 (a). Thereby, the movable element 13 moves to the left direction by the electromagnetic thrust F in the direction of the arrow acting between the operating coil 13a and the permanent magnet 12b of the stator 12, and the handle 1a of the circuit breaker. Switch to the OFF position. The same applies to RESET after a trip operation of the circuit breaker. On the other hand, in the case where the handle 1a is driven to the ON position and the circuit breaker is switched ON, the excitation current supplied to the operation coil 13a is reversed in the direction shown in Fig. 5B. As a result, the mover 13 receives the electromagnetic thrust F in the right direction, and the handle 1a of the circuit breaker switches to the ON position. In addition, the position of the handle 1a can be visually confirmed through the window hole 3a opened in the front surface of the case 3.

Here, as in the embodiment shown in Figs. 1 (a), 2 and 3, two sets of linear actuators are fitted by interposing two sets of electronic linear actuators in a symmetrical manner and combining the movable members together. In addition to driving the handle of the circuit breaker by summing the magnetic thrusts, the mover can be prevented from rotating about the stator.

In the case where the handle 1a of the circuit breaker 1 is manually switched and operated in a state in which an excitation current cannot be supplied to the operation coil 13a as in the case of power failure, the case of the remote operation device 2 ( It is possible to switch by directly placing the hand on the handle 1a from the window hole 3a (see FIG. 2) opened in 3). In this case, since the movable element 13 is not influenced by the magnetic force of the permanent magnet 12b, the handle 1a can be comfortably switched and operated without applying an extra force.

1 is a configuration diagram of a remote control device according to an embodiment of the present invention, (a) is an external view of a state in which the electronic linear actuator is connected to a handle of a circuit breaker, (b) is an electronic linear in (a) Schematic diagram of the actuator.

FIG. 2 is an external view of an assembled state in which a case is mounted on the electronic linear actuator of FIG. 1. FIG.

3 is a top view in a state where the case cover of FIG. 2 is removed.

4 is a side view of the case side wall of FIG.

Fig. 5 is an operation explanatory diagram of the electronic linear actuator shown in Fig. 1 (b), in which (a) and (b) show a state corresponding to an OFF operation and an ON operation, respectively.

6 is a configuration diagram of a conventional remote control device, in which (a) is a perspective cross-sectional view of a state in which a remote control device is mounted on a circuit breaker, and (b) and (c) are terminations of (a), respectively. Front view, and top view of a remote control device.

7 is a schematic configuration diagram of a conventional electronic linear actuator mounted on the remote control device of FIG. 6.

FIG. 8 is an explanatory view of the operation of the remote control device shown in FIG. 6, (a) shows a circuit diagram of the remote control unit, and (b) shows a handle position of a circuit breaker corresponding to ON, OFF, TRIP, and RESET. Drawing.

(Explanation of symbols for the main parts of the drawing)

1: circuit breaker

1a: handle

2: remote control device

12: Stator of Electronic Linear Actuator

12a: guide pipe

12b: Permanent Magnet

12c: veneer

13: mover of electronic linear actuator

13a: operation coil

13b: coil winding frame

13c: connecting plate

Claims (3)

A remote operation device of a circuit breaker mounted on a circuit breaker having a rocker handle and switching the handle to an ON, OFF, RESET position, the remote operation device having an electronic linear actuator, In connecting the actuator of the linear actuator, and to switch the handle by remote operation of the electronic linear actuator, The electronic linear actuator includes a stator having a pair of rod-shaped permanent magnets magnetized in reverse polarity in series and built in a guide pipe for moving the guide, and operatively supporting the operation coil in accordance with the guide pipe. A remote control device for a circuit breaker, comprising: a single mover, wherein the mover is connected to a handle of a circuit breaker, and the switch is operated by selectively switching an excitation current flowing through the operation coil. The method of claim 1, The guide pipe with the rod-shaped permanent magnet of the stator is a non-magnetic pipe, and the guide pipe is placed on the side of the handle, and the coil winding frame recommended for the operator's operation coil is slidably inserted into the outer circumference of the guide pipe. And the coil winding frame is engaged with and connected to the handle of the circuit breaker at this position. The method of claim 1, Two sets of linear actuators are arranged juxtaposed on both sides of the handle, and the movers are integrally coupled to each other and connected to the handle of the circuit breaker.

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