JP4722018B2 - Control circuit device for drawer type circuit breaker device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control circuit device for a drawing type breaker device capable of improving reliability of an input control circuit by reducing the number of contact such as a limit switch used. <P>SOLUTION: The limit switch inserted in an input control circuit is made to open and close interlocked with the position so as to distinguish an input breaking possible position or a test position and the other position of the drawing type breaker device, and the identical limit switch is made to be opened so as to cut off the current flowing into the input coil by input operation of an input instruction switch interlocked with the input operation of the breaker. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a drawer type circuit breaker device used for opening and closing an electric power system, and in particular, a drawer type that reduces the number of limit switches used in the closing control circuit and improves the reliability of the closing control circuit. The present invention relates to a circuit breaker device control circuit device.

  FIG. 5 is a circuit configuration diagram showing a conventional control circuit device of a drawer type circuit breaker device disclosed in Patent Document 1, for example. This figure shows a state where the circuit breaker is in an “open circuit” state and the closing spring is released. In the figure, 1 is a closing command switch, 2 is a tripping command switch, 3 is an electric motor for storing springs, 4 is a closing coil, 5 is a tripping coil, and 6 is a closing circuit closing operation (closing) This is a limit switch for enabling coil energization. Reference numeral 7 denotes a spring accumulation detection limit switch that detects that the closing spring necessary for closing the circuit breaker is accumulated, and is closed when the spring is accumulated. Reference numeral 8 denotes a limit switch for starting / stopping the electric motor 3, which is opened when the accumulation of the spring is completed.

  9 (that is, 9a, 9b) is a circuit breaker auxiliary contact that operates in conjunction with the opening / closing of the circuit breaker. 9a is a contact and 9b is b contact. 10 is an auxiliary relay for an electric motor, and 10a is a contact point. 11 is an auxiliary relay for preventing pumping, 11a is its a contact, and 11b is its b contact. The auxiliary relay 11 for preventing pumping prevents the exciting current from continuously flowing through the making coil 4 even if the making command switch 1 is kept pressed. 13 detects the position of the drawer-type circuit breaker device by interlocking with an interlock lever mounted on the drawer-type circuit breaker device, and the drawer-type circuit breaker device does not perform the closing / breaking operation except at the position where the closing / breaking is possible or the test position. This is an interlock limit switch.

  As for the interlock limit switch, the drawer type circuit breaker device is closed at the closing position or the test position, and the drawer type circuit breaker device is opened at an intermediate position other than the closing position or the test position. R1, R2, R3, and R4 are resistors. Reference numeral 14 denotes an arrester. Reference numeral 15 denotes a full-wave rectifier circuit. The draw-out type circuit breaker device 16 is a portion surrounded by a two-dot chain line, can be drawn out and stored from the terminal mechanism of the power system, and a portion 17 surrounded by a broken line is a circuit board.

  Next, the operation will be described. In the closing (closing) operation, first, by connecting a power source, the coil of the auxiliary relay 10 is excited via the limit switch 8, the contact 10a of the auxiliary relay 10 is closed, and the limit switch 8 and the contacts 10a, 10a are closed. Then, the electric motor 3 is started, and accumulation of the closing spring is started. When the closing spring is fully stored, the limit switch 8 is opened and the electric motor 3 stops. At the same time, the limit switch 7 is closed and a closing control circuit is formed.

  When the circuit breaker is in the “open” state, the circuit breaker can be turned on, the limit switch 6 is closed, and the b-contact 11b of the pumping prevention auxiliary relay 11 is closed. In addition, when the drawer type circuit breaker device is in the closing breaker position or the test position, the limit switch 13 is closed, the limit switch 7 is “closed” with the closing spring stored, and the breaker auxiliary contact b The circuit is configured so that the contact 9b is closed and the circuit breaker can be turned on.

  If the closing command switch 1 is closed in this state and the power supply is connected, the closing coil 4 is excited via the b contact 11b of the pumping prevention auxiliary relay 11, and the closing latch of the operation mechanism section is released. Then, the circuit breaker is turned on by the stored energy of the closing spring. At this time, the limit switch 8 is closed and the limit switch 7 is opened by releasing the closing spring. When the limit switch 8 is closed, the electric motor 3 is activated, stores the closing spring, and prepares for the next closing operation.

  As the circuit breaker is turned on, the circuit breaker auxiliary contact b contact 9b, which operates in conjunction with the circuit breaker opening and closing, is opened, and the current flowing through the closing coil 4 is cut off regardless of whether the limit switch 7 is opened or closed. To do. When the circuit breaker is closed, the circuit breaker auxiliary contact a contact 9a that operates in conjunction with opening and closing of the circuit breaker is closed, and the coil of the pumping prevention auxiliary relay 11 is excited.

  As a result, the b-contact 11b of the pumping prevention auxiliary relay 11 is opened, and the circuit breaker auxiliary contact 9b remains closed and the limit switch 7 remains closed even when the closing command switch 1 remains closed. However, no voltage is applied to the making coil 4, and burning of the making coil 4 is prevented. At the same time, the a-contact 11a of the pumping prevention auxiliary relay 11 is also closed, and even if the closing command switch 1 is kept closed, the excitation coil 4 self-holds the excitation so that the voltage is applied to the closing coil 4. There is no participation. When the circuit breaker is in the closed state, the a contact 9a of the auxiliary switch that operates in conjunction with the opening / closing of the circuit breaker is closed to prepare for the tripping (breaking) operation of the circuit breaker.

  Next, the tripping operation of the circuit breaker will be described. When the detection circuit (not shown) detects an abnormality or when it is desired to manually shut off the circuit, when the trip command switch 2 is closed, the circuit breaker is provided for the trip (break) operation as described above. The trip coil 5 is excited through the contact a 9a of the circuit breaker auxiliary contact, the engagement of the trip latch of the operation mechanism is released, and the circuit breaker is opened (break).

  Note that, for example, if the closing spring necessary for operating the circuit breaker is not stored, the limit switch 7 is in an open state, and the circuit breaker is closed even if the closing command switch 1 is closed. It remains open without. Further, when the drawer type circuit breaker device is in a position other than the closing circuit breaker position or the test position, the limit switch 13 linked with the interlock lever mounted on the drawer type circuit breaker device is in an open state. As described above, even when the closing command switch 1 is closed, the circuit breaker does not close and remains open.

JP 2001-338555 A (first column 26 line-second column 14 line, FIG. 10)

  Since the control circuit device of the conventional pull-out type circuit breaker device is configured as described above, there are a number of contact points such as limit switches, and thus there is a problem that reliability is low and failure probability is high. . The present invention has been made to solve the above-described problems, and is a drawer that can reduce the number of contacts such as a limit switch to be used and improve the reliability of the closing control circuit while maintaining the function. An object of the present invention is to obtain a control circuit device for a circuit breaker device.

  A control circuit device for a drawer type circuit breaker device according to the present invention includes a closing command switch, a closing coil that is excited via a limit switch by a closing operation of the closing command switch, a tripping command switch, and this tripping command. In a control circuit device of a drawer type circuit breaker device comprising a trip coil excited by a tripping operation of a switch, and a circuit breaker that is turned on by excitation of the closing coil and tripped by excitation of the tripping coil, The limit switch is opened / closed in conjunction with the position so as to identify the position where the insertion breaker is possible or the test position of the drawer type circuit breaker device and the other position, and the same limit switch is connected to the closing command switch. Is opened so that the current flowing through the closing coil is interrupted in conjunction with the closing operation of the circuit breaker.

  According to the control circuit device of the drawer type circuit breaker device of the present invention, in the drawer type circuit breaker device, the number of contacts such as a limit switch used in the closing control circuit can be reduced while maintaining the function, The reliability of the input control circuit can be improved.

Embodiment 1 FIG.
1 is a circuit configuration diagram showing a control circuit device of a drawer type circuit breaker device according to Embodiment 1 of the present invention. In the figure, 1 is a closing command switch, 2 is a tripping command switch, 4 is a closing coil, 5 is a tripping coil, 20 is a limit switch, 11 is an auxiliary relay for preventing pumping, 11a is its a contact, 11b is its The b contact, 9 (9a, 9b) is a circuit breaker auxiliary contact that operates in conjunction with the opening / closing of the circuit breaker. 9a is the a contact and 9b is the b contact. 14 is an arrester, and 15 is a full-wave rectifier circuit. R2, R3, and R4 are resistors. The drawer type circuit breaker device 16 is a portion surrounded by a two-dot chain line, and can be drawn out and stored from the terminal mechanism of the power system, and a portion 17 surrounded by a broken line is a circuit board. This drawer-type circuit breaker device is equipped with a mechanism for opening and closing the circuit breaker by electromagnetic operation, and does not include an electric motor circuit for closing spring accumulation. The circuit breaker closing control circuit includes a circuit board 17 portion, a closing command switch 1, a closing coil 4, a limit switch 20, and a circuit breaker auxiliary contact 9a connected to the auxiliary relay 11 for preventing pumping. Is done.

  The following operation will be described. In the case of the closing (closing) operation, the b contact 11b of the pumping prevention auxiliary relay 11 is closed when the circuit breaker is open. In addition, the limit switch 20 is closed. When the closing command switch 1 is closed in this state and the power supply is connected, the closing coil 4 is excited via the b contact 11b of the pumping prevention auxiliary relay 11, and the circuit breaker is turned on.

  When the circuit breaker is closed as the circuit breaker is turned on, the a contact 9a of the circuit breaker auxiliary contact that operates in conjunction with the opening and closing of the circuit breaker is closed, and the a contact 9a and the a contact 11a are connected. The coil of the auxiliary pumping prevention relay 11 is excited (bypassing the resistors R2 and R3). As a result, the b-contact 11b of the pumping prevention auxiliary relay 11 is opened, and even when the closing command switch 1 remains closed, no voltage is applied to the closing coil 4 and the burning of the closing coil 4 is prevented. At the same time, the a contact 11a of the pumping prevention auxiliary relay 11 is also closed (through the circuit of the resistors R2 and R3), and the excitation of the pumping prevention auxiliary relay 11 is self-maintained even if the closing command switch 1 is kept closed. By doing so, no voltage is applied to the closing coil 4. When the circuit breaker is in the closed state, the a contact 9a of the auxiliary switch that operates in conjunction with the opening / closing of the circuit breaker is closed to prepare for the tripping (breaking) operation of the circuit breaker.

  Next, the tripping operation of the circuit breaker will be described. When the detection circuit (not shown) detects an abnormality or when it is desired to manually shut off the circuit, when the trip command switch 2 is closed, the circuit breaker is provided for the trip (break) operation as described above. The trip coil 5 is excited via the contact a 9a of the circuit breaker auxiliary contact, and the circuit breaker is opened (break).

  FIG. 2 is a mechanical configuration diagram showing a drawer type circuit breaker device equipped with a mechanism for opening and closing the circuit breaker by electromagnetic operation according to the first embodiment. The figure shows the open circuit state at the position where the circuit breaker can be turned off or at the test position. 1 to 4, the same reference numerals indicate the same parts. In the figure, 4 is a closing coil, 5 is a tripping coil, 20 is a limit switch connected in series to the closing coil 4 in FIG. 1, 21 is an electromagnetic operating mechanism having a closing coil 4 and a tripping coil 5, and 22 is a closing operation. A mover 23 that operates by the electromagnetic force of the coil 4 and the tripping coil 5 is a drive lever that opens and closes an internal contact of the limit switch 20.

  Reference numeral 25 denotes an interlock lever for detecting that the drawer-type circuit breaker device is in a closing / breakable position or a test position, and is attached to the drawer-type circuit breaker. A hole 26 into which the interlock lever 25 fits into the position where the withdrawal type breaker device can be turned off and a hole into which the interlock lever 25 fits into the test position where the drawer type circuit breaker device is pulled out, for example. 27 and a convex portion 28 that pushes up the interlock lever 25 at an intermediate position therebetween. Reference numeral 30 denotes a link interlocking with the interlock lever 25, reference numeral 31 denotes a return spring connected to the link 30, reference numeral 32 denotes a main circuit link connected to the mover 22, and reference numeral 33 denotes a vacuum valve to constitute a circuit breaker.

  FIG. 3 is a view showing a state in which the drawer type circuit breaker device is closed at a closing breakable position or a test position, and FIG. 4 is a view showing a state in which the interlock lever 11 is raised upward when the circuit breaker is open. Yes. That is, in FIG. 4, since the interlock lever 11 is moved upward, it indicates that the drawer type circuit breaker device is in an intermediate position that is not a closing position or a test position.

  Next, the operation will be described. When the closing command switch 1 (FIG. 1) is turned on when the circuit breaker of FIG. 2 is open, as shown in FIG. 3, a voltage is applied to the closing coil 4, the closing coil 4 is excited, and the mover 22 is lowered. The direction, that is, the vacuum valve (breaker) 33 is driven to be closed. At this time, the mover 22 pushes the drive lever 23 that opens and closes the internal contact of the limit switch 20 and opens the limit switch 20 in conjunction with the circuit breaker 33 being closed. Cut off the input current flowing in the. That is, the limit switch 20 is opened so that the current flowing to the closing coil 4 by the closing operation of the closing command switch 1 is interrupted in conjunction with the closing operation of the circuit breaker.

  Further, in the circuit breaker open state shown in FIG. 4, when the drawer type circuit breaker device is arranged at a position other than the closing breakable position or the test position, the interlock lever 25 for detecting the position of the drawer type circuit breaker device has a hole. It will be in the state which shifted from 26,27 to the convex part 28, and went up. In this case, the link 30 operates in conjunction with the interlock lever 25 that detects the position of the drawer type circuit breaker device, and the limit lever 20 is opened by pressing the drive lever 23 that opens and closes the internal contact of the limit switch 20. Thus, even if the closing command switch 1 (FIG. 1) is closed, the circuit breaker cannot be closed because the limit switch 20 is open.

  In the state shown in FIG. 4, when the pull-out type circuit breaker device is in the closing breakable position or the test position, the interlock lever 25 that detects the position of the pull-out type circuit breaker device uses the force of the return spring 31 via the link 30. Then, it moves downward from the convex portion 28 to the hole 26, the limit switch 20 is closed, and returns to the position shown in FIG. By entering this state, it is possible to prepare for the closing operation of the circuit breaker. In other words, the limit switch 20 is a mechanism that can be opened and closed in conjunction with the position so as to distinguish between the position where the drawer breaker device can be turned off or the test position and other positions.

It is a circuit block diagram which shows the control circuit apparatus of the drawer type circuit breaker apparatus by Embodiment 1 of this invention. It is a mechanical block diagram which shows the drawer type circuit breaker apparatus carrying the mechanism which opens and closes the circuit breaker by electromagnetic operation by Embodiment 1. FIG. It is a figure which shows a closed state in the drawer | drawing-out type circuit breaker apparatus by Embodiment 1 in a making-off interruption possible position or a test position. It is a figure which shows positions other than the position where a drawer type circuit breaker device according to Embodiment 1 can be turned off and cut off or a test position. It is a circuit block diagram which shows the control circuit apparatus of the conventional drawer type circuit breaker apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input command switch 2 Trip command switch 4 Input coil 5 Trip coil 9 (9a, 9b) Circuit breaker auxiliary contact 11 Pumping prevention auxiliary relay 14 Arrester 15 Full wave rectifier circuit 16 Pull-out type circuit breaker device 17 Circuit board 20 Limit Switch 21 Electromagnetic operation mechanism 22 Movable element 23 Drive lever 25 Interlock lever 26 Hole 27 Hole 28 Convex 30 Link 31 Return spring 32 Main circuit link 33 Vacuum valve (breaker)

Claims (2)

A turn-on command switch, a turn-on coil that is excited via a limit switch by a turn-on operation of the turn-on command switch, a trip command switch, a trip coil that is excited by a trip operation of the trip command switch, In a control circuit device of a drawer type circuit breaker device that is inserted by excitation of a closing coil and includes a circuit breaker that is tripped by excitation of the trip coil,
The limit switch is opened / closed in conjunction with the position so as to identify the position where the insertion breaker is possible or the test position of the drawer type circuit breaker device and the other position, and the same limit switch is connected to the closing command switch. A control circuit device for a drawer type circuit breaker device that opens so that the current flowing through the making coil is interrupted in conjunction with the making operation of the circuit breaker.   2. The control circuit device for a drawer type circuit breaker device according to claim 1, wherein the limit switch is closed at a position where the closing of the drawer type circuit breaker device can be interrupted or at a test position, and opened at other positions.

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