JP6012813B2 - Electromagnetic operation device for switchgear - Google Patents

Description

  The present invention relates to an electromagnetic operating device for a switching device such as a vacuum switching device.

  Patent Document 1 discloses an electromagnetic operation opening / closing device. This electromagnetic operation opening / closing device includes a vacuum valve, an electromagnetic operation electromagnet, and a drive power supply device. The electromagnetically operated electromagnet has a closing coil, an opening coil, and a movable iron core, and the movable contact of the vacuum valve is driven by the movable iron core. The drive power supply device has a closing capacitor, an opening capacitor, and a charging device for charging them, and the closing capacitor gives the released energy to the closing coil of the electromagnetically operated electromagnet, The movable contact of the vacuum valve is closed to the fixed contact, and the opening capacitor provides the released energy to the opening coil of the electromagnetic operating magnet, thereby opening the movable contact of the vacuum valve from the fixed contact. .

  Patent Document 2 discloses an electromagnetic actuator for a vacuum circuit breaker. This electromagnetic actuator has a coil L1 and a coil L2, and a magnetic body driven by them, and causes a current to flow through the coil L1 to generate an electromagnetic force in the magnetic body, thereby closing the vacuum circuit breaker. The vacuum circuit breaker is opened by causing a current to flow through the coil L2 to generate an electromagnetic force in the magnetic material.

International Publication Number WO2008 / 038421 JP 2005-223168 A

In Patent Documents 1 and 2, opening and closing devices such as vacuum valves and vacuum circuit breakers can be closed and opened, but the high-speed reclosing duty recently required for switching devices cannot be satisfied. This high-speed reclosing duty is to reclose the switchgear shortly after the switchgear is opened for the first time when an abnormal condition occurs in the load circuit when the switchgear is closed, and the load current of the load circuit It is the duty to shorten the time to be cut off. If the abnormal condition of the load circuit has been resolved with the switchgear closed again, the switchgear will remain closed after the reclose and supply load current to the load circuit continuously. To do. However, if the abnormal state has not been resolved in the state where the switchgear is closed again, it is necessary to restart the electrode after a short time after the reclosing. For this reason, in order to satisfy the high-speed reclosing duty, it is necessary to have a function capable of executing the reopening pole operation after the first opening operation.
In Patent Documents 1 and 2, since the electrical energy accumulated in the closing capacitor and the opening capacitor is released by the closing operation and the opening operation of the switchgear, it is difficult to satisfy the high-speed reclosing duty.

  The present invention proposes an electromagnetic operating device for a switchgear that can satisfy a high-speed reclosing duty.

The electromagnetic operating device for a switchgear according to the present invention includes first and second opening capacitors that open the switchgear by discharging the stored electrical energy charged from a charging circuit, and the first opener. A first opening actuator coil connected to the capacitor, a second opening actuator coil connected to the second opening capacitor, and the first and second opening actuator coils And an opening command switch selectively connected to
A diode is inserted between the charging circuit and the first and second opening capacitors, and the first and second opening capacitors are charged from the charging circuit through the diodes. A first opening operation for opening the switchgear when an abnormal state occurs in a load circuit electrically connected to the switchgear in a closed state of the switchgear, the second to the first resumption pole by the closing device to resume pole command pulse when the abnormal state in the reclosing condition has not been corrected by the re-closing command pulse the switchgear after opening operation The first opening operation is configured such that electric energy released from the first opening capacitor is transmitted through the opening command switch to the first opening operation. Actuator The second opening actuator coil is executed by supplying the coil to the second opening actuator coil, and the second opening actuator coil is configured to supply the electric energy released from the second opening capacitor through the opening command switch. In addition, when the cycle time of the commercial AC voltage is ΔT1, the reclosing operation of the switchgear is completed by the reclosing command pulse, The time interval from the point when the resuming pole operation of the switchgear is completed by the resuming pole command pulse is 3 × ΔT1 .

  In the electromagnetic operating device for a switchgear according to the present invention, a diode is interposed between the charging circuit and the first and second opening capacitors, and the first and second opening capacitors are The charging circuit is configured to be charged from the charging circuit through each of the diodes, and the switching device is opened when an abnormal state occurs in a load circuit electrically connected to the switching device in a closed state of the switching device. A first opening operation, and a second opening operation for reopening the switching device when the abnormal state has not been resolved in a state in which the switching device is closed again after the first opening operation. In the first opening operation, the electric energy released from the first opening capacitor is supplied to the first opening actuator coil through the opening command switch. Supply And the second opening operation supplies the electric energy released from the second opening capacitor to the second opening actuator coil through the opening command switch. So that the fast reclosing duty can be met.

FIG. 1 is an overall configuration diagram showing an electromagnetic operating device for a switchgear according to the present invention and a switchgear operated thereby. FIG. 2 is an electric circuit diagram showing Embodiment 1 of the electromagnetic operating device for a switchgear according to the present invention. FIG. 3 is a timing chart showing the opening command signal and the opening switching signal together with the closing command signal in the first embodiment. FIG. 4 is an electric circuit diagram showing Embodiment 2 of the electromagnetic operating device for a switchgear according to the present invention. FIG. 5 is an electric circuit diagram showing Embodiment 3 of the electromagnetic operating device for a switchgear according to the present invention.

  Several embodiments of an electromagnetic operating device for a switchgear according to the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram showing an electromagnetic operating device for an opening / closing device according to the present invention and an opening / closing device operated thereby.

  The electromagnetic operating device 10 for a switchgear according to the present invention electromagnetically operates the switchgear 40 to close and open the switchgear 40. The switchgear 40 includes various switchgears such as a vacuum switchgear, an air circuit breaker, and a gas circuit breaker. The switching device 40 is configured using, for example, a vacuum switching device, and includes a fixed contact 41 and a movable contact 43 facing the fixed contact 41. The electromagnetic operating device 10 drives the movable contact 43 of the switching device 40, closes the movable contact 43 to the fixed contact 41, and opens the movable contact 43 from the fixed contact 41. The fixed contact 41 and the movable contact 43 are electrically connected to the load circuit 45 so as to open and close the load circuit 45 of the switching device 40. For example, a commercial AC voltage is applied to the load circuit 45, and the switchgear 40 energizes and interrupts an AC load current based on the commercial AC voltage.

  The electromagnetic operating device 10 includes a movable iron core 11, a closing actuator coil 13, an opening actuator coil 15, a closing drive circuit 20, a closing control circuit 21, a opening drive circuit 30, and an opening. A control circuit 31 is included. The movable iron core 11 is connected to the movable contact 43 of the switching device 40. The closing actuator coil 13 is disposed on the outer periphery of one end of the movable iron core 11, and the opening actuator coil 15 is disposed on the outer periphery of the other end of the movable iron core 11, and drives the movable iron core 11. The closing actuator coil 13 is connected to the closing drive circuit 20 and is energized by the closing drive circuit 20. The closing control circuit 21 controls the closing drive circuit 20. When energized, the closing actuator coil 13 drives the movable iron core 11 in the closing direction indicated by the arrow DC, and closes the movable contact 43 to the fixed contact 41. The opening actuator coil 15 is connected to the opening driving circuit 30 and is energized by the opening driving circuit 30. The opening control circuit 31 controls the opening drive circuit 30. When the opening actuator coil 15 is energized, it drives the movable iron core 11 in the opening direction indicated by the arrow DO and opens the movable contact 43 from the fixed contact 41.

  A contact pressure spring 47 is disposed between the movable contact 43 of the switching device 40 and the movable iron core 11 of the electromagnetic operating device 10. The contact spring 47 is disposed on the spring receiver 49. The contact pressure spring 47 ensures the contact pressure between the movable contact 43 and the fixed contact 41 in the closed state of the switching device 40.

  FIG. 2 is an electric circuit diagram showing Embodiment 1 of the electromagnetic operating device for a switchgear according to the present invention. The electromagnetic operating device 10 for a switchgear according to the first embodiment includes the opening actuator coil 15, the opening drive circuit 30, and the opening control circuit 31 shown in FIG. Details of the opening drive circuit 30 are shown. Since the present invention is mainly characterized by the opening drive circuit 30 and the opening control circuit 31, the closing actuator coil 13, the closing drive circuit 20, and the closing control circuit 21 are omitted in FIG. Yes.

  The opening drive circuit 30 includes a charging circuit 1, backflow prevention diodes 2 </ b> A and 2 </ b> B, first and second opening capacitors 3 </ b> A and 3 </ b> B, a changeover switch 4, and an opening command switch 6. The opening actuator coil 15 is connected between the changeover switch 4 and the opening command switch 6.

  The charging circuit 1 has a pair of input terminals 1a and 1b connected to a control power source and an output terminal 1c. A DC charging voltage V is output to the output terminal 1c. The first opening capacitor 3A has a ground terminal and a non-ground terminal, and the non-ground terminal is connected to the output terminal 1c of the charging circuit 1 through a backflow prevention diode 2A. The second opening capacitor 3B also has a ground terminal and a non-ground terminal, and the non-ground terminal is connected to the same output terminal 1c through the backflow prevention diode 2B. These opening capacitors 3A and 3B are charged by the charging DC voltage V output to the output terminal 1c of the charging circuit 1 and accumulate electric energy.

  The changeover switch 4 includes a pair of first and second switch elements 4A and 4B. These switch elements 4A and 4B operate in reverse to each other so that when one of them is turned on, the other is turned off. The changeover switch 4 is controlled by an opening change signal OS output from the opening control circuit 31 and is switched between the first switch state and the second switch state. The first switch state is a state where the first switch element 4A is turned on and the second switch element 4B is turned off, and the second switch state is a state where the first switch element 4A is turned off. In this state, the second switch element 4B is turned on. The changeover switch 4 is switched by the opening switching signal OS, and the first switch state and the second switch state are switched each time the opening switching signal OS is output.

  The opening-use actuator coil 15 has a ground-side terminal and a non-ground-side terminal, and the non-ground-side terminal passes through the first switch element 4A of the changeover switch 4 and is ungrounded for the first opening capacitor 3A. The second switch element 4B of the changeover switch 4 is connected to a non-ground terminal of the second opening capacitor 3B. The opening command switch 6 is connected between the ground terminal of the opening actuator coil 15 and the ground. The opening command switch 6 is controlled by an opening command signal OC output from the opening control circuit 31. The opening command switch 6 is normally in an off state, and is turned on when the opening command signal OC is output. When the opening command signal OC is canceled, the opening command switch 6 returns to a normal state.

  The opening control circuit 31 outputs an opening switching signal OS for controlling the changeover switch 4 and an opening command signal OC for controlling the opening instruction switch 6. The opening command signal OC is output, for example, when an abnormal state such as a short circuit is detected in the load circuit 45 of the switching device 40. The opening switching signal OS is also output in association with the opening command signal OC when an abnormal state of the load circuit 45 is detected.

  FIG. 3 is a time chart showing the opening switching signal OS and the opening command signal OC by the opening control circuit 31 together with the closing command signal CC by the closing control circuit 21. 3A shows the opening command signal OC by the opening control circuit 31, FIG. 3B shows the opening switching signal OS by the opening control circuit 31, and FIG. The closing command signal CC by the closing control circuit 21 is shown. The horizontal axes in FIGS. 3A, 3B, and 3C are common time axes.

  The opening command signal OC shown in FIG. 3A includes opening command pulses OC1 and OC2. The opening command pulse OC1 is output from the opening control circuit 31 at a timing t1 when an abnormal state such as a short circuit is detected in the load circuit 45 in the closed state of the switching device 40. Of course, when no abnormality such as a short circuit occurs in the load circuit 45, the opening command pulse OC1 is not output. The opening command pulse OC2 is a resumption pole command pulse, and is output when the abnormal state detected at the timing t1 continues without being resolved at the timing t3 after the opening command pulse OC1 is output. The When the abnormal state is resolved at timing t3, the restart pole command pulse OC2 is not output even when timing t3 is reached. From the opening command pulses OC1, OC2, the opening operation is completed after a predetermined opening operation time Δt. The predetermined opening operation time Δt is specifically a time of 100 milliseconds or less.

  The opening switching signal OS shown in FIG. 3 (b) includes opening switching pulses OS1 and OS2. When the opening command pulse OC1 is output and when the opening command pulse OC2 is output, the opening operation is completed after a predetermined opening operation time Δt, and the timing at which this opening operation is completed. Thus, the opening switching pulses OS1 and OS2 are output. These opening switching pulses OS1 and OS2 are output from the opening control circuit 31. When the opening command pulses OC1 and OC2 are not output, the opening operation is not executed and the opening switching pulses OS1 and OS2 are not output. The changeover switch 4 is inverted between the first switch state and the second switch state by the opening changeover pulses OS1 and OS2.

  In the closing command signal CC shown in FIG. 3C, a reclosing command pulse CC2 is shown. When the opening command pulse OC1 is output at the timing t1, the reclosing command pulse CC2 is output at the timing t2 when the predetermined time interval T has elapsed from the timing t1. The reclose command pulse CC2 is output from the close control circuit 21. If the opening command pulse OC1 is not output at the timing t1, the reclosing command pulse CC2 is not output. Specifically, the predetermined time interval T is set to 0.3 seconds.

The timing when the time interval ΔT has elapsed from the timing t2 is the timing t3. At this timing t3, as described above, the restart pole command pulse OC2 may be output. Specifically, the time interval ΔT is ΔT = (3 × ΔT1 + α), where ΔT1 is one cycle time of the commercial AC voltage applied to the load circuit 45. The time interval between the time when the reclosing operation is completed by the reclosing command pulse CC2 and the time when the reopening operation is completed by the resumption pole command pulse OC2 is set to a value of (3 × ΔT1). The time interval ΔT is a value obtained by adding a predetermined value α to the value of (3 × ΔT1). The value of (3 × ΔT1) is, for example, 50 milliseconds when the commercial AC voltage is 60 Hz, and is 60 milliseconds when the commercial AC voltage is 50 Hz, for example. The value of the predetermined value α is re-closing command pulse CC2 open pole operation time by closing operation time and resume pole command pulse OC2 by the value obtained by considering. Thus, by setting the time interval ΔT between the reclosing command pulse CC2 and the resumption pole command pulse OC2 to ΔT = (3 × ΔT1 + α), the reclosing operation is completed by the reclosing command pulse CC2. And the time interval between when the restart pole operation is completed by the restart pole command pulse OC2 is a value of (3 × ΔT1).

  In FIG. 3, the state before timing t1 is that the closing actuator coil 13 is energized by the closing command pulse CC1 (not shown) preceding the reclosing command pulse CC2, and the opening / closing device 40 is movable. It is assumed that the contact 43 maintains a closed state in which the fixed contact 41 is closed. In this closed state, it is assumed that the changeover switch 4 is in the first switch state, for example, the switch element 4A is in the on state, and the switch element 4B is in the off state.

  The operation will be described. The first and second opening capacitors 3A and 3B are charged by the DC charging voltage V of the charging circuit 1 and accumulate electric energy. When the opening command pulse OC1 is output at the timing t1 in the closing state of the switching device 40, the opening command switch 6 is turned on. The changeover switch 4 is in the first switch state at the timing t1, and the first switch element 4A is in the on state. Therefore, at timing t1, the opening command switch 6 is turned on based on the opening command pulse OC1, so that the first opening capacitor 3A is connected to the first switch element 4A and the opening command switch 6 The accumulated electrical energy is released to the opening actuator coil 15, and the opening actuator coil 15 is energized by the electrical energy released from the opening capacitor 3 </ b> A, and the first opening of the switching device 40. Perform the action. With this first opening operation, the movable contact 43 opens from the fixed contact 41 in the switching device 40. In the first opening operation, since the second switch element 4B of the changeover switch 4 is in the OFF state, the second opening capacitor 3B maintains the state where electric energy is accumulated.

  The opening switching pulse OS1 is output at the timing when the opening operation time Δt has elapsed from the timing t1 by the opening command pulse OC1, and the switching switch 4 is switched to the second switch state by the opening switching pulse OS1. . Even if the changeover switch 4 is switched to the second switch state and the switch element 4B is turned on, the opening command switch 6 is not turned on until the timing t3. Capacitor 3B maintains a state where electric energy is accumulated.

  When the opening command pulse OC1 is output at the timing t1, the closing control circuit 21 outputs the reclosing command pulse CC2 at the timing t2 when the predetermined time interval T has elapsed from the timing t1, and the closing drive circuit 20 The movable contact 43 of the switching device 40 is reclosed to the fixed contact 41 based on the reclose command pulse CC2. A commercial AC voltage is applied to the load circuit 45 by this re-closing, but the abnormal state of the load circuit 45 detected at the timing t1 continues without being canceled in the re-closed state. The opening control circuit 31 outputs a restart pole command pulse OC2 at timing t3. At the timing t3, since the second switch element 4B of the changeover switch 4 is in the on state, the opening command switch 6 is turned on by the reopening pole command pulse OC2, so that the second opening element 4B The capacitor 3B releases the accumulated electric energy to the opening actuator coil 15 through the second switch element 4B and the opening command switch 6, and the opening actuator coil 15 is released from the opening capacitor 3B. Energized by the electrical energy, the second opening operation of the switchgear 40 is executed. With this second opening operation, the movable contact 43 resumes from the fixed contact 41 in the switchgear 40.

  As described above, in the electromagnetic operating device for switchgear 10 according to the first embodiment shown in FIG. 2, the first and second opening capacitors 3A and 3B and the changeover switch 4 are provided, so that at the timing t1. Since the first opening operation can be executed and the second opening operation can be executed at the timing t3, the switching device 40 can be given the responsibility of reclosing.

Embodiment 2. FIG.
FIG. 4 is an electric circuit diagram showing Embodiment 2 of the electromagnetic operating device for a switchgear according to the present invention. The electromagnetic operating device 10A for switchgear according to the second embodiment includes first and second opening actuator coils 15A and 15B, an opening drive circuit 30A, and an opening control circuit 31. In FIG. In particular, the opening drive circuit 30A is shown in detail. In the electromagnetic operating device 10A according to the second embodiment, the opening actuator 15 in the first embodiment is replaced with two first and second opening actuator coils 15A and 15B, and the opening driving circuit 30A. And the connection between the opening actuator coils 15A and 15B are changed as shown in FIG. The first and second opening actuator coils 15 </ b> A and 15 </ b> B are concentrically arranged at the position of the opening actuator coil 15 shown in FIG. 1, that is, at the outer periphery of the other end of the movable core 11. Other configurations are the same as those of the electromagnetic operating device 10 shown in FIG.

  In the opening drive circuit 30A shown in FIG. 4, the non-grounding side terminal of the opening actuator coil 15A is directly connected to the non-grounding terminal of the opening capacitor 3A, and the non-grounding side terminal of the opening actuator coil 15B is opened. It is directly connected to the non-ground terminal of the electrode capacitor 3B. The grounding side terminal of the opening actuator coil 15 </ b> A is grounded through the switch element 4 </ b> A of the changeover switch 4 and the opening command switch 6. The grounding side terminal of the opening actuator coil 15 </ b> B is grounded through the switch element 4 </ b> B of the changeover switch 4 and the opening command switch 6. In the electromagnetic operating device 10A according to the second embodiment, the changeover switch 4 and the opening command switch 6 are directly connected, and each switch element 4A, 4B of the changeover switch 4 and each opening capacitor 3A, 3B are connected. The opening actuator coils 15A and 15B are connected between them. As a result, the opening command switch 6 is selectively connected to the opening actuator coils 15A and 15B through the switch elements 4A and 4B of the changeover switch 4, and the switch element 4A of the changeover switch 4 is connected to the opening actuator coil. The switch element 4B of the changeover switch 4 is connected to the opening actuator coil 15B.

  Also in the electromagnetic operating device 10A according to the second embodiment, the same opening command signal OC, opening switching signal OS, and closing command signal CC as shown in FIGS. 3A, 3B, and 3C are used. When the opening command pulse OC1 is output at timing t1, the opening command switch 6 is turned on, and the electric energy accumulated in the first opening capacitor 3A is changed to the first switch element of the changeover switch 4. 4A and the opening command switch 6 are discharged to the first opening actuator coil 15A, and the opening actuator coil 15A executes the first opening operation of the switching device 40. At timing t2, the closing actuator coil 13 is energized by the reclosing command pulse CC2, and the closing operation is performed in which the switching device 40 is reclosed. When the opening command pulse OC2 is output at the timing t3, the opening command switch 6 is turned on, and the electrical energy accumulated in the second opening capacitor 15B is changed to the second switch element of the changeover switch 4. 4B and the opening command switch 6 are discharged to the second opening actuator coil 15B, and the second opening operation of the switching device 40 is executed by the second opening actuator coil 15B. Note that, at the timing t1, the second switch element 4B of the changeover switch 4 is in the OFF state, so the second opening capacitor 3B maintains the state where electric energy is accumulated.

  As described above, in the electromagnetic operating device for switchgear 10A according to the second embodiment shown in FIG. 4, the first and second opening contacts are provided for the first and second opening opening actuator coils 15A and 15B. By providing the capacitors 3A and 3B and the changeover switch 4, the first opening operation can be executed at the timing t1, and the second opening operation can be executed at the timing t3. You can have a duty to close the circuit.

  In the electromagnetic operating device for switchgear 10A according to the second embodiment, when one of the first and second opening actuator coils 15A and 15B is disconnected, the opening operation is executed by the other one, and the opening is performed. The situation where the operation becomes impossible can be avoided.

Embodiment 3 FIG.
FIG. 5 is an electric circuit diagram showing Embodiment 3 of the electromagnetic operating device for a switchgear according to the present invention. The electromagnetic operating device 10B for switchgear according to the third embodiment includes opening actuator coils 15A and 15B, an opening drive circuit 30B, and an opening control circuit 31B. In particular, FIG. Details of 30B are shown. In the electromagnetic operating device 10B according to the third embodiment, the opening actuator coil 15 in the first embodiment is replaced with two first and second opening actuator coils 15A and 15B, and an opening drive circuit is provided. The connection between 30B and the opening actuator coils 15A and 15B is changed as shown in FIG. The first and second opening actuator coils 15 </ b> A and 15 </ b> B are concentrically arranged at the position of the opening actuator coil 15 shown in FIG. 1, that is, at the outer periphery of the other end of the movable core 11. Further, in the electromagnetic operating device 10B according to the third embodiment, the selector switch 4 in the first embodiment is deleted, and the opening command switch 6 is replaced with two first and second opening command switches 6A and 6B. Thus, the opening control circuit 31B supplies the opening command pulses OC1 and OC2 to the opening command switches 6A and 6B, respectively, and does not output the opening switching signal OS. Other configurations are the same as those of the electromagnetic operating device 10 shown in FIG.

  Also in the opening drive circuit 30B shown in FIG. 5, the non-grounding side terminal of the first opening actuator coil 15A is directly connected to the non-grounding terminal of the first opening capacitor 3A, so that the second opening actuator The non-ground side terminal of the coil 15B is directly connected to the non-ground terminal of the second opening capacitor 3B. The ground side terminal of the first opening actuator coil 15A is grounded through the first opening command switch 6A. The ground side terminal of the second opening actuator coil 15B is grounded through the second opening command switch 6B. In the electromagnetic operating device 10B according to the third embodiment, the first and second opening command switches 6A and 6B are respectively connected between the first and second opening capacitors 3A and 3B. The second opening actuator coils 15A and 15B are connected.

  Also in the electromagnetic operating device 10B according to the third embodiment, the same opening command signal OC and closing command signal CC as shown in FIGS. 3A and 3C are used. When the opening command pulse OC1 is output at the timing t1, the first opening command switch 6A is turned on, and the electric energy accumulated in the first opening capacitor 15A is changed to the first opening command. The first opening actuator coil 15A is discharged through the switch 6A, and the first opening operation of the switching device 40 is executed by the first opening actuator coil 15A. At timing t2, the closing actuator coil 13 is energized by the reclosing command pulse CC2, and the closing operation is performed in which the switching device 40 is reclosed. When the opening command pulse OC2 is output at the timing t3, the second opening command switch 6B is turned on, and the electric energy accumulated in the second opening capacitor 15B is converted into the second opening command. The second opening actuator coil 15B is discharged through the switch 6B, and the second opening operation of the switching device 40 is executed by the second opening actuator coil 15B. At the timing t1, the second opening command switch 6B is in the OFF state, so the second opening capacitor 3B maintains the state where electric energy is accumulated.

  As described above, in the electromagnetic operating device for switchgear 10B according to Embodiment 3 shown in FIG. 5, the first and second opening capacitors 3A, By providing 3B and the first and second opening command switches 6A and 6B, the first opening operation can be executed at the timing t1, and the second opening operation can be executed at the timing t3. Therefore, the opening / closing device 40 can be given a reclosing duty.

  In the electromagnetic operating device for switchgear 10B according to the third embodiment, when one of the first and second opening actuator coils 15A and 15B is disconnected, the opening operation is performed by the other one, and the opening is performed. The situation where the operation becomes impossible can be avoided. Also, one of the first and second opening command switches 6A and 6B is not provided because one of the opening command pulses OC1 and OC2 is not supplied to one of the first and second opening command switches 6A and 6B. When a non-operating state occurs, the opening operation is executed by the other, and a situation in which the opening operation becomes impossible can be avoided.

  The electromagnetic operating device for a switchgear according to the present invention is used as an electromagnetic operating device for electromagnetically closing and opening various switchgears.

3A: first opening capacitor, 3B: second opening capacitor, 40: switchgear,
15: Actuator coil for opening, 4: Changeover switch,
15A: first opening actuator coil, 6A: first opening command switch,
15B: Second opening actuator coil, 6B: Second opening command switch.

Claims (3)

First and second opening capacitors that open the switchgear by discharging the stored electrical energy charged from the charging circuit, and a first opening connected to the first opening capacitor Actuator coil, a second opening actuator coil connected to the second opening capacitor, and an opening command switch selectively connected to the first and second opening actuator coils And
A diode is inserted between the charging circuit and the first and second opening capacitors, and the first and second opening capacitors are charged from the charging circuit through the diodes. Configured to be
A first opening operation for opening the switchgear when an abnormal state occurs in a load circuit electrically connected to the switchgear in a closed state of the switchgear; and the first opening operation the switchgear reclosing command pulses by reclosing the said opening and closing device by resuming pole command pulse when the abnormal state is not resolved in the state and the second opening operation to resume poles respectively after Configured to run,
The first opening operation is performed by supplying electric energy discharged from the first opening capacitor to the first opening actuator coil through the opening command switch, and A second opening operation is configured to be performed by supplying the electric energy released from the second opening capacitor to the second opening actuator coil through the opening command switch. ,
In addition, when one cycle time of the commercial AC voltage is ΔT1, when the reclose operation of the switchgear is completed by the reclose command pulse, the reopening operation of the switchgear by the restart pole command pulse An electromagnetic operating device for a switchgear, characterized in that the time interval from the point in time when the operation is completed is 3 × ΔT1 . The electromagnetic operating device for a switchgear according to claim 1, further comprising:
A changeover switch connected in series to the opening command switch,
The change-over switch includes first and second switch elements that operate in reverse to each other, the first switch element serving as the first opening actuator coil, and the second switch element serving as the second opening element. Connected to the actuator coil for poles,
The first opening operation supplies the electric energy released from the first opening capacitor to the first opening actuator coil through the opening command switch and the first switch element. And the second opening operation is performed by using the electric energy released from the second opening capacitor for the second opening through the opening command switch and the second switch element. An electromagnetic operating device for a switchgear, which is executed by supplying the actuator coil.   3. The electromagnetic operating device for a switchgear according to claim 1 or 2, wherein when one of the first and second opening actuator coils is disconnected, the opening operation of the switchgear is executed by the other one. An electromagnetic operating device for a switchgear.

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