JP2003297217A - Reclosing circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic reclosing circuit breaker in which a close-circuit action is possible at the time of an open-circuit action of the circuit breaker even in the automatic reclosing circuit device in which the open-circuit action frequencies are very low. <P>SOLUTION: In the reclosing circuit device comprising a circuit breaker including a contact device connected to an electrical path to open/close the electrical circuit, an operating handle to acting on the contact device to carry out an opening/closing operation of the contact device, an abnormal current detecting device to detect an overcurrent or a leakage current in the circuit, a tripping device to open/close the contact device linked to the abnormal current detecting device, and an open/close state detecting device to detect an opening/closing state of the contact device, and a circuit breaker input means that acts on the operating handle of the circuit breaker and carries out a reclosing action when the electric circuit is opened by a contact opening action of the circuit breaker by receiving an output of the opening/closing state detecting device. The reclosing circuit device is constituted to be characterized in that the circuit breaker input means is controlled to act on the operating handle and to carry out the input action of the circuit breaker in every prescribed time interval irrespective of the opening/closing state of the circuit breaker. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker which is operated when an open circuit operation is performed due to an overcurrent, a leakage current, a lightning surge or the like. The present invention relates to a device for automatically returning to a closed state. In particular, the present invention relates to an automatic reclosing device that is installed at an unmanned base or the like and automatically closes an electric circuit when a circuit breaker malfunctions. 2. Description of the Related Art A conventional automatic reclosing device includes a circuit breaker connected to an electric circuit and an operation handle which is connected to an operation handle of the circuit breaker by an arm when the circuit breaker opens. And a reclosing means for operating the electric circuit in a closed state. An operation mechanism using a motor, a gear, a shaft, and the like is used for the arm operation of the reclosing means, and the motor drives the gear and the shaft to cause the arm to act on the operation handle to operate to close the electric circuit. The operation of the reclosing means is to perform the closing operation when the circuit breaker opens due to an overcurrent, a leakage current, a lightning surge or the like. [0003] However, the frequency of the circuit breaker of the automatic reclosing device installed at an unmanned base or the like to open the circuit is low, and the operation may occur once every several years, for example. That's about it. The grease used for gears and shafts is applied to the operation mechanism of the reclosing means in order to perform the operation smoothly. However, since the operation frequency is extremely low, the applied grease solidifies and adheres due to aging. However, when the operation of the apparatus is actually required, the apparatus cannot be driven and cannot perform the closing operation. Therefore, the present invention can reliably close a circuit at the time of opening operation of a circuit breaker even in an automatic reclosing device having an extremely low opening operation frequency without increasing the cost as compared with the conventional device. It is intended to provide an automatic reclosing device. [0005] Therefore, in the present invention,
A contact device connected to an electric circuit for turning on and off the electric circuit, an operation handle acting on the contact device to open and close the contact device, an abnormal current detecting device for detecting an overcurrent or a leakage current in the electric circuit, and the abnormal current detecting device A circuit breaker including a tripping device that opens and closes a contact device in conjunction with a switching device and an open / closed state detection device that detects the open / closed state of the contact device, and when an electric circuit is opened by a contact opening operation of the circuit breaker. A circuit breaker closing means for receiving an output of the open / closed state detecting device and acting on an operation handle of the circuit breaker to perform a reclosing operation. Provides a reclosing device characterized in that it acts on the operation handle at every predetermined time interval regardless of the open / close state of the circuit breaker to perform a closing operation of the circuit breaker. It is intended. The present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a standby state of the automatic reclosing device. FIG. 2 is a diagram showing an operation state of the automatic reclosing device. Reference numeral 1001 denotes a circuit breaker, and 1002 denotes an operation handle. By operating the operation handle 1003, the circuit breaker 1001 performs an on / off operation. 100
Reference numeral 3 denotes an operation section of the circuit breaker closing means. The operation unit 1003 of the circuit breaker closing means includes a motor 1004,
A pulley 1005 fixed to a motor 1004, a shaft 1006 having one end connected to the pulley 1005 via a connection portion 1009, an arm 1007 connected to the other end of the shaft 1006 via a connection portion 1010, and an arm 1007 It is configured to include an action portion 1008 which is fixed and acts on the operation handle 1002. Grease for smooth operation is applied to the connection portions 1009, 1010 and the rotation center 1011. Normally, the reclosing device has a positional relationship as shown in FIG. In this state, when the motor 1004 starts rotating, the pulley 1005 also starts rotating, and the shaft 1006 connected via the connecting portion 1009 is pushed out to draw a circular arc in the left direction in FIG.
The arm 1007 fixed and supported so as to become 011 is driven to the left in the drawing via the connection portion 1010. With the movement of the arm 1007, the action portion 1008 becomes
002 is pushed to move the circuit breaker 1001 in the closing direction. When the motor 1004 continues to rotate, the rotation of the pulley 1005 causes the connection portion 1009 to rotate.
Moves so as to draw a downward arc trajectory in the figure, and the shaft 1006 operates to be pulled rightward in the figure, and the arm 1007 and the action section 1008 move rightward in the figure (the operation handle 1002 cuts off the circuit). (The direction in which the container 1001 is opened). When the arm moves to the right in the figure, the operation handle remains stopped at the closed position and does not interfere with the operation handle. That is, when the operation handle 1002 of the circuit breaker is in the closed position, even if the operation section 1003 of the circuit breaker closing means performs a series of operations, it does not affect the operation of the circuit breaker. In the operation state shown in FIG. 2, the operating handle 1002 of the circuit breaker 1001 is at a position indicating an open circuit state. Actuation unit 1
008 performs an operation to push the operation handle 1002 to the left in the figure, closes the circuit breaker 1001, and returns to the initial standby state by rotating the motor 1004. FIG. 3 is a schematic diagram showing a detection unit for detecting whether the circuit breaker 1001 is open or closed. Circuit breaker 1
001 incorporates an open / closed state detection device 3001 of a contact device constituting a circuit breaker. The open / closed state detection device 3001 is electrically connected to a control circuit 3002 constituting a circuit breaker closing means, and the control circuit is electrically connected to a motor 1004. The open / closed state detection device 3001 is a device that can electrically determine an open state or a closed state of a contact device constituting a circuit breaker from the outside. The control circuit unit 3002 reads the change in the voltage of the open / closed state detection device 3001 and outputs a drive signal to the motor 1004. The control circuit section 3002 has a periodic drive operation execution command section 3003 for sending a drive signal to the motor 1004 at a predetermined time interval. In this embodiment, the time interval is set to one week. The periodic drive operation execution command unit 3003 is provided with the motor 100 every week.
Then, a drive signal is sent to 4 to operate the circuit breaker closing means. As described above, the circuit breaker closing means
When the operation handle 1002 is in the closed state of the circuit breaker 1001, the operation can be performed without interfering with the operation handle. For this reason, by operating the circuit breaker closing means once a week, it is possible to prevent solidification and fixation of grease to the operation unit 1003 of the circuit breaker closing means, and even in a reclosing device having a low operation frequency. By performing the driving operation periodically in advance, it is possible to reliably perform the operation when the operation is required. As described above, according to the present invention, the grease applied is prevented from solidifying and fixed by periodically controlling the operation of the operating part of the circuit breaker, and the frequency of the opening operation is extremely low. Even with a low automatic reclosing device, it is possible to provide an automatic reclosing device capable of reliably performing a closing operation when the circuit breaker opens.

[Brief description of the drawings] FIG. 1 is a diagram showing a standby state of an apparatus. FIG. 2 is a diagram showing an operation state of the apparatus. FIG. 3 is a diagram showing an open / closed state detection unit; [Explanation of symbols] 1000 electric circuit 1001 Circuit breaker 1002 Operation handle 1003 Operation part of circuit breaker closing means 1004 motor 1005 pulley 1006 shaft 1007 arm 1008 Action part 1009, 1010 Connection part 1011 Rotation center

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Koji Inoue             3-42 Oshu, Minami-ku, Hiroshima             Industrial Co., Ltd. F term (reference) 5G030 AB01

Claims (1)

Claims: 1. A contact device connected to an electric circuit for turning on and off an electric circuit, an operating handle acting on the contact device to open and close the contact device, and detecting an overcurrent or a leakage current in the electric circuit. A circuit breaker including an abnormal current detecting device, a trip device for opening and closing the contact device in conjunction with the abnormal current detecting device, and an open / close state detecting device for detecting an open / close state of the contact device; Circuit breaker closing means for receiving the output of the open / closed state detecting device when the electric circuit is opened by the contact opening operation of the circuit breaker, acting on the operation handle of the circuit breaker to perform the reclose operation. In the reclosing device, the circuit breaker closing means acts on the operation handle at predetermined time intervals irrespective of the open / close state of the circuit breaker to perform a closing operation of the circuit breaker. A reclosing device characterized by the above-mentioned.