JP5587284B2 - Switch and operation method of switch - Google Patents

Description

  The present invention relates to a switch or a method of operating a switch, and more particularly to a switch that continues to issue a closing command when it is turned on.

  Power supply equipment for large ocean-going vessels is installed in power supply facilities due to an increase in cargo handling equipment capacity and an increase in refrigerated cargo. The switch is high pressure.

  Here, as an operation mechanism of the switch, for example, there is one described in Patent Document 1. In this patent document 1, in order to open and close the interruption | blocking part, the electromagnetic operating device which transmits the driving force accompanying the electromagnetic force which generate | occur | produced from the electromagnet to the interruption | blocking part via a link mechanism is used. When the electromagnet is driven, a capacitor for accumulating electric power for exciting the electromagnet coil, and the direction of the current supplied from the capacitor to the electromagnet coil in response to a closing command or an opening command for the switch are controlled. An attempt has been made to stably operate the electromagnet.

JP 2002-2107026 A

  In general, including the above-described operation of the switch, each operation is performed in response to a closing command when it is turned on and an opening command when it is opened. In other words, a charging command is issued when attempting to input, and no special charging command or opening command is issued until the opening is attempted after the charging is completed. When opening the contact, an opening command is issued separately.

  In addition, the closing state and the opening state are maintained even without a power source. For example, in the above-described electromagnetic operating device, the closing state is held by a permanent magnet and the opening state is held by a spring.

  However, according to the above method, the opening operation is not performed unless the opening command is issued, and the opening operation may not be appropriately performed if an abnormality occurs in the opening command for some reason.

  Therefore, a first object of the present invention is to provide a method for operating a switch that can perform the opening operation more reliably. It is a second object of the present invention to provide a switch that can perform the opening operation more reliably.

In order to solve the above-described problems, a switch operating method according to the present invention includes a fixed electrode, a movable electrode facing the fixed electrode and operating in a closed position or an open position, a relay, and the movable electrode closed. A switch operating method comprising a closing circuit for moving to a position and a trip circuit for moving a movable electrode to an open position, wherein when the circuit is closed, the relay is excited by the input of a closing command, When the closing circuit is excited after the excitation, the movable electrode moves to the closed position. When the movable electrode is in the closed position, the relay is always excited, and when the open circuit is opened, the relay is released by releasing the closing command. When the trip circuit is excited after the relay is de-energized, the movable electrode is moved to the open position, and the switch is further connected to a contact between the power source and the input circuit. When When the relay is energized, the a contact is turned on and the b contact is turned off and the a contact is turned on at the same timing. Thus, the closing circuit is excited, and the trip circuit is excited when the b-contact is turned on.

In addition, the switch according to the present invention includes a fixed electrode, a movable electrode that operates in a closed position or an open position so as to face the fixed electrode, a power source, an ON / OFF switchable input command, a relay, and a movable Arranged between a closing circuit for moving the electrode to the closed position, a trip circuit for moving the movable electrode to the open position, and between the power source and the closing circuit. A contact that is turned off when the relay is released, and a contact that is disposed between the power source and the trip circuit, and that is turned off when the relay is excited and turned on when the excitation is released. Te, the relays are the closing command is excited by the power of ON times the power supply, when the relay is energized, the a-contact is ON and the contact b at the same timing, characterized in that the turned OFF.

According to the present invention, it is possible to perform the opening operation more reliably.

It is a side view of the circuit breaker concerning Example 1. FIG. 3 is a making-trip circuit diagram (T6) according to the first embodiment. 3 is a time chart of a closing / trip circuit according to the first embodiment. FIG. 3 is a charging / trip circuit diagram (T3) according to the first embodiment. FIG. 5 is a making-trip circuit diagram according to the second embodiment. It is a side view of the vacuum circuit breaker using the electromagnetic operating device which concerns on Example 3. FIG. It is a front view shown in the partial cross section of the electromagnetic operating device which concerns on Example 3. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. The specific embodiments described in detail below are not intended to limit the contents of the invention to the specific contents, and can be modified to various aspects as long as the invention described in the claims is satisfied. Needless to say.

  A first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, a circuit breaker 1 according to the present embodiment includes a housing 10, an operation device 2 accommodated in the housing 10, and a fixed electrode and a fixed electrode, which are not illustrated. It is comprised from the interruption | blocking part 4 provided with the movable electrode which is distribute | arranged and switches an open position and a closed position with respect to a fixed electrode, and the link mechanism 3 which connects the operating device 2 and the interruption | blocking part 4. FIG.

  The opening / closing operation of the movable electrode in the blocking unit 4 is operated by the operating device 2 via the link mechanism 3. The operating device 2 includes a control device for controlling opening and closing, and also includes a mechanism for holding the circuit breaker 1 in a closed state and an open state.

  As shown in FIG. 2, the OFF trip circuit according to the present embodiment includes a control power source PN, auxiliary switch a contact 22a and b contact 22b of the circuit breaker 1, and a command for moving the movable electrode from the open position to the closed position. , A trip circuit 52 that outputs a command for moving the movable electrode from the closed position to the open position, a turn-on command 53 that can be switched ON / OFF, a relay 55, and an operation following the relay. Relay a contact 55a and relay b contact 55b. The auxiliary switch a contact 22a is disposed between the control power supply PN and the trip circuit 52, and is disposed in series with the relay b contact 55b and on the control power supply PN side. The auxiliary switch b contact 22b is disposed between the control power supply PN and the input circuit 51, and is disposed in series with the relay a contact 55a and on the control power supply PN side. As will be described later, the auxiliary switch a contact 22a and the auxiliary switch b contact 22b operate following the movement of the movable electrode of the blocking section 4.

  The operation of the member in the open circuit shown in FIG. 2 will be described below every time (T1 to T6) with reference to FIG. T1 to T3 correspond to the input operation, and the input state is maintained in the state of T3. T4 to T6 correspond to the opening operation, and the open state is maintained in the state of T6. The state shown in FIG. 2 is a state of T6. In the state of T6, the input command 53, the relay a contact 55a and the auxiliary switch a contact 22a are OFF, and the relay b contact 55b and the auxiliary switch b contact 22b are ON.

<Input operation>
[T1] First, the input command 53 is turned ON from the state of T6. Thereby, electric power from the power supply PN is applied to the relay 55 and excited.
[T2] After a predetermined time (T2-T1) after the relay 55 is excited, the relay a contact 55a that operates following the excitation state of the relay 55 is turned on, and the relay b contact 55b is turned off. When the relay a contact 55a is turned on, power from the power source PN is applied to the making circuit 51, and the operation device 2 starts making operation.
[T3] When the closing operation is completed and the circuit breaker 1 is in the closing state, the auxiliary switch a contact 22a that operates following the movement of the movable electrode of the blocking unit 4 is turned on, and the auxiliary switch b contact 22b is turned off. When the auxiliary switch b contact 22b is turned off, the closing circuit 51 is turned off. The circuit breaker 1 holds the closed state by the holding mechanism of the controller device 2. A circuit diagram in the state of T3 is shown in FIG.

<Opening operation>
Next, the opening operation will be described.
[T4] When the input command 53 is turned off from the state of T3, the relay 55 is not excited.
[T5] After a predetermined time (T5-T4) after the relay 55 is no longer excited, the relay a contact 55a that operates following the excitation state of the relay 55 is turned off and the relay b contact 55b is turned on. When the relay b contact 55b is turned on, the trip circuit 52 is turned on, and the controller device 2 starts the opening operation.
[T6] When the circuit breaker 1 is opened, the auxiliary switch a contact 22a that operates following the movement of the movable electrode of the circuit breaker 4 is turned off, the auxiliary switch b contact 22b is turned on, and the trip circuit 52 is turned off. Become.

  According to the present embodiment, the opening operation can be performed by turning off the closing command that is always in the ON state at the time of closing without issuing the opening command, so that the opening operation can be performed more reliably. . Therefore, safety and reliability can be improved.

  According to this embodiment, by providing the relay 55 that is excited by turning on the input command 53, the opening operation can be performed more reliably, and the safety and reliability can be improved with a simple structure. Can do.

  In addition, the circuit breaker 1 is turned on after the relay b contact 55b that operates following the relay 55 excited by turning on the turn-on command 53 is turned off (T2 <T3). Safety and reliability can be improved.

  Example 2 will be described with reference to FIG. Note that the description of the same parts as those in the first embodiment is omitted.

  In this embodiment, the closing circuit 51a and the trip circuit 52b are operated by different power sources. That is, a control power supply is used for the input circuit 51a as in the first embodiment, but another trip power supply 61 is provided for the trip circuit 52b.

  As shown in the present embodiment, it is possible to install a trip power supply 61 for tripping separately from the control power supply PN. By installing the trip power supply 61 separately from the control power supply PN, the control power supply PN is provided. Even if the circuit goes down, the opening operation can be performed, and the reliability of the circuit is improved.

  Further, if a storage power source such as a capacitor or a storage battery is used as the trip power source 61, the opening operation can be performed even when the control power source of the system fails, and the reliability is further improved.

  It goes without saying that a conventional circuit for turning on the trip circuit 52 in response to the trip command 54 can be provided in parallel.

  In each of the above embodiments, the operating device 2 holds the closing state of the circuit breaker 1, but the circuit breaker 1 does not have a closing state holding mechanism, and the closing command 53 continues to flow to the closing circuit 51. Thus, it is possible to electrically hold the circuit breaker 1 in the on state. In this case, it becomes possible to remove the auxiliary switch b contact 22b of the circuit breaker between the closing command 53 and the closing circuit 51, and the structure of the apparatus can be simplified.

  A third embodiment will be described with reference to FIGS. 6 and 7. In addition, the description is abbreviate | omitted about the location which overlaps with said each Example.

  The vacuum circuit breaker 1 includes an electromagnetic operation device 20 as an operation device and a vacuum valve 41 at a breaker. The vacuum valve 41 includes a fixed electrode 41 a and a movable electrode 41 b, and operates the movable electrode 41 b with an operation force generated by the electromagnetic operation device 20 via the link mechanism 3. The electromagnetic operating device 20 includes an electromagnet 21, an auxiliary switch 22, a control connector 23, a capacitor 24, a control board 25, and a trip spring 26. The electromagnet 21 further includes a permanent magnet 211, a coil 212, A movable rod 213, a movable side plunger 214, and a fixed side plunger 215 are provided.

  The operation of the electromagnetic operating device 20 will be described. The electromagnetic operating device 20 inputs a control power supply PN from the control connector 23 and charges the capacitor 24 via the control board 25. In the closing operation, when a closing command 53 is input, a current flows from the capacitor 24 so as to excite the coil 212 in the same direction as the magnetic flux of the permanent magnet 211, and the movable side plunger 214 is moved to the fixed side plunger 215 to be turned on. . At this time, the trip spring 26 is fed. The charged state is held by the attractive force of the permanent magnet 211. Of course, also in this embodiment, the circuit breaker 1 does not have a closing state holding mechanism, and it is possible to hold the closing state of the breaker 1 electrically by keeping the closing command 53 flowing to the closing circuit 51. is there.

  When a trip command is input, a current flows from the capacitor 24 so as to excite the coil 212 in the direction opposite to the magnetic flux of the permanent magnet 211, and the movable side plunger 214 is fixed to the fixed side plunger 215 by the tripped spring 26 that has been fed. Opening by pulling away from. The open state is held by the trip spring 26.

  Since the electromagnetic operating device 20 operates with the energy stored in the capacitor 24, power consumption can be suppressed. Even in a vacuum circuit breaker using this electromagnetic operation device, an OFF trip circuit breaker can be realized by the above-mentioned circuit, and since the capacitor 24 is used as a power source, the system can be operated without installing a separate power source for the OFF trip. Even when the control power supply fails, it can be tripped OFF, improving reliability.

  In addition, although each said Example demonstrated the case where it vacuum-insulates, it cannot be overemphasized that this invention itself does not have the restriction | limiting that it is not a specific insulation system, such as air insulation of a switch, vacuum insulation, and gas insulation. .

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Operating device 3 Link mechanism 4 Breaking part 10 Housing 20 Electromagnetic operating device 21 Electromagnet 22 Auxiliary switch 22a Auxiliary switch a contact 22b Auxiliary switch b contact 23 Connector 24 Capacitor 25 Control board 41 Vacuum valve 41a Fixed electrode 41b Movable electrode 51 Closing circuit 52 trip circuit 53 closing command 54 trip command 55 relay 55a relay a contact 55b relay b contact 61 trip power supply 211 permanent magnet 212 coil 213 movable rod 214 movable side plunger 215 fixed side plunger

Claims (7)

A fixed electrode, a movable electrode that moves to a closed position or an open position opposite the fixed electrode, a relay, a closing circuit for moving the movable electrode to the closed position, and a movable electrode for moving the movable electrode to the open position A switch operating method comprising a trip circuit,
When the circuit is closed, the relay is excited by the input of the closing command,
The movable electrode is moved to a closed position by exciting the closing circuit after exciting the relay,
When the movable electrode is in the closed position, the relay is always energized,
When the circuit is opened, the excitation of the relay is canceled by canceling the closing command,
When the trip circuit is excited after the relay is de-energized, the movable electrode moves to the open position ,
The switch further includes a contact disposed between a power source and the input circuit, and a contact b disposed between the power source and the trip circuit.
When the relay is energized, the contact a is turned on and the contact b is turned off at the same timing.
When the contact a is turned on, the closing circuit is excited,
The switch operating method , wherein the trip circuit is excited when the b contact is turned on . A method for operating a switch according to claim 1 ,
The switch further includes an auxiliary switch b contact disposed between a power source and the input circuit, and an operation device that generates an operation force for operating the movable electrode,
When the contact a is turned on, the closing circuit is excited and the movable electrode is moved to the closed position, and then the auxiliary switch b contact is turned off to release the excitation of the closing circuit, and the movable electrode Is a switch operating method characterized in that the closed state is maintained by the holding force of the operating device. Fixed electrode, movable electrode that moves to the closed or open position facing the fixed electrode, power supply, ON / OFF switchable input command, relay, and input for moving the movable electrode to the closed position A circuit and a trip circuit for moving the movable electrode to the open position;
A contact disposed between the power source and the input circuit, which is turned on when the relay is excited and turned off when the excitation is released;
A switch disposed between the power source and the trip circuit, and having a b contact that is turned off when the relay is energized and turned on when the excitation is released;
Switch said relays is the closing command is ON sometimes excited by the power of the power supply, when the relay is energized, the a-contact at the same timing is ON and the b-contact, characterized in that turned OFF. A fixed electrode, a movable electrode that operates in a closed position or an open position opposite to the fixed electrode, a first power source, a second power source, an ON / OFF switchable input command, a relay, and a movable electrode A closing circuit for moving the movable electrode to the closed position, a trip circuit for moving the movable electrode to the open position,
A contact disposed between the first power source and the input circuit, which is turned on when the relay is energized and turned off when the excitation is released;
A switch disposed between the second power source and the trip circuit, and having a b contact that is turned off when the relay is excited and turned on when the excitation is released;
Switch said relays is the closing command is ON sometimes excited by the power of the power supply, when the relay is energized, the a-contact at the same timing is ON and the b-contact, characterized in that turned OFF. The switch according to claim 4 , wherein the second power source is a storage power source. The switch according to any one of claims 3 to 5 , wherein the switch is a vacuum circuit breaker that houses the movable electrode and the fixed electrode in a vacuum valve and has a current blocking performance. A switch characterized by being. The switch according to any one of claims 3 to 6 ,
Furthermore, an electromagnet, a permanent magnet that maintains the open position of the movable electrode, and an electromagnetic operating device having a capacitor,
A switch comprising: a link mechanism for connecting the electromagnetic operating device and the movable electrode.