JP2005197122A - Closing method of solenoid operation type switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a switch ready for closing operation by supplying a capacitor with direct-current power when it is in a discharge state. <P>SOLUTION: The solenoid operation type switch 10 is installed in a place without a power source, where, when the capacitor 30 is in a discharge state, a secondary plug 24 is fitted to a power source terminal of a case 22, and a direct current power is supplied from a closing power source 38 to the capacitor 30 through a cable 36 and the secondary plug 24 to store energy in the capacitor 30. Next, when a closing button 26 is pressed for operation, a conductive circuit on a control board 34 is closed, an electromagnet 32 is excited by the energy stored in the capacitor 30, and a driving force accompanying electromagnetic force generated by the electromagnet 32 is transmitted to vacuum breakers 12, 14, 16 through a link mechanism to be put into the closing operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a switching method of a switchgear, and more particularly, to a switching method of an electromagnetically operated switchgear provided with a switch and an electromagnetic controller.

A switch (switchgear) is provided as an element of the power distribution facility in the power distribution system of the power system. Conventionally, as this type of switch, a gas insulation type using SF ₆ gas as an insulating medium and a vacuum insulation type using vacuum insulation as an insulating medium are used.

  An electromagnetically-operated operating device using electromagnetic force in addition to spring force has been proposed when opening and closing a switch such as a circuit breaker. This electromagnetic operation type operating device uses the electromagnetic force of the electromagnet when the switch is turned on, and opens the switch mainly using the spring force of the breaking spring (tripping spring) when the switch is opened. The structure to be adopted is adopted.

  Also, in this electromagnetically operated switchgear that combines an electromagnetically operated actuator and a switch, energy for driving the electromagnet is stored in the capacitor, and electromagnetic force is generated from the electromagnet according to the energy stored in the capacitor. In addition, a configuration is adopted in which the driving force associated with the electromagnetic force is transmitted to the circuit breaker via the link mechanism so that the switch is turned on. In addition, the shut-off spring is compressed to store energy in the shut-off spring when it is turned on, and when it is opened, a current in the opposite direction to that of the electromagnet is applied to generate an electromagnetic force in the reverse direction from the electromagnet. A configuration is adopted in which the spring force accumulated in the cutoff spring is applied to the link mechanism as a driving force in the opposite direction to that at the time of closing to open the switch.

  The electromagnetic operation type switchgear adopts a configuration in which energy from DC power is stored in the capacitor, the electromagnet is driven according to the stored energy, and the switch is turned on by the driving force associated with the electromagnetic force generated from the electromagnet. Therefore, it is possible to generate a larger driving force than that of the method of generating only the driving force associated with the spring force when being turned on, and to reduce the size of the apparatus.

  An electromagnetically operated switchgear that drives an electromagnet according to the energy stored in the capacitor can operate the switch on and off based on the energy stored in the capacitor. When the energy cannot be stored, for example, when an electromagnetically operated switchgear is installed in a place where there is no power supply, or when power is not supplied due to an accident even in a place where there is a power supply, turn on the switch. Can not be.

  An object of the present invention is to supply a DC power to a capacitor so that the switch can be turned on when the capacitor is in a discharging state.

  In order to solve the above-mentioned problems, the present invention connects a power supply for supplying DC power to a power supply terminal of an electromagnetically operated switchgear when the capacitor is in a discharging state when the electromagnetically operated switchgear is turned on. Then, DC power from the power supply for charging is supplied to the capacitor via the power supply terminal and energy is stored in the capacitor. Then, the power button is operated to drive the electromagnet according to the energy stored in the capacitor. The switch is operated to be turned on by transmitting the driving force accompanying the electromagnetic force generated from the switch to the switch via the link mechanism.

  According to the present invention, even when the capacitor is in a discharged state, the switch can be turned on by supplying DC power to the capacitor.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view when an input power source is connected to an electromagnetically operated switchgear according to the present invention. In FIG. 1, the electromagnetically operated switchgear 10 includes vacuum circuit breakers 12, 14, 16 as electromagnetic switches corresponding to three phases, and an electromagnetically operated controller 18. , 16, the electromagnetically operated operating device 18 is fixed on the base 20. A secondary plug 24 attached to a power supply terminal (not shown) or the like disposed on the case 22 is disposed on the upper side of the case 22 of the electromagnetic operation type operating device 18. The input button 26 and the release button 28 are fixed. Inside the case 22 are disposed a capacitor 30, an electromagnet 32, and a control board 34 that receive power supplied from the secondary plug 24 and store energy from DC power.

  The electromagnet 32 includes a movable iron core fixed around a shaft (not shown), a fixed iron core arranged opposite to the movable iron core, a coil arranged around the movable iron core and the fixed iron core, and the like. The shaft to which the movable iron core is fixed is inserted into the vacuum breakers 12, 14, and 16 via a link mechanism (not shown) in a state of being inserted through a through hole formed in the central portion of the fixed iron core. It is connected. The electromagnet 32 generates an electromagnetic force for moving the movable iron core toward the fixed iron core when the coil is energized by the DC power stored in the capacitor 30. When the driving force accompanying the electromagnetic force is transmitted to the link mechanism via the shaft, the vacuum circuit breakers 12, 14, and 16 are turned on.

  The control board 34 closes the energizing circuit connecting the capacitor 30 and the coil of the electromagnet 32 in response to the closing operation of the closing button 26, and opens the energizing circuit connecting the capacitor 30 and the coil of the electromagnet 32 to the opening button 28. It is configured to shut off (open) in response to the operation. That is, the control board 34 closes an energization circuit that connects the capacitor 30 and the coil of the electromagnet 32 in response to the closing operation when the closing button 26 is turned on by the closing operation, and accumulates in the capacitor 30. The generated energy is supplied to the coil of the electromagnet 32. The control board 34 is mounted with a control logic unit for controlling energization of the charging circuit and discharging circuit of the capacitor 30 and the coil of the electromagnet 32. When the secondary plug connected to the switchboard is attached to a power supply terminal or the like instead of the secondary plug 24, the control logic unit responds to a closing command or an opening command input to the secondary plug. Control for opening and closing an energization circuit connecting 30 and the coil of the electromagnet 32 is performed.

  Each vacuum circuit breaker 12, 14, 16 includes a movable contact and a fixed contact, and is configured to contact or separate the movable contact and the fixed contact from each other in response to driving forces in different directions acting on the link mechanism. Has been.

  On the other hand, a power supply 38 for connection is connected to the secondary plug 24 attached to the power supply terminal of the case 22 via a cable 36. As shown in FIG. 2, the power supply 38 for turning on includes a box-shaped case 40, and a light emitting diode 42 for power supply and a power on / off button 44 are arranged on the surface of the case 40. As shown in FIG. 3, a dry battery 46, a DC / AC converter 48, a rectifier 50, a resistor 52, and a capacitor 54 are accommodated in the case 40.

  The dry battery 46 is detachably disposed in the case 40 as a battery that generates a DC voltage of 12V to 24V, and the output of the battery 46 is connected to the DC / AC converter 48 via the power on / off button 44. . The DC / AC converter 48 is configured as a power converter that converts DC power generated by the output of the dry battery 46 into AC power, and the output of the DC / AC converter 48 is supplied to the rectifier 50. The rectifier 50 rectifies the output signal of the DC / AC converter 48 and outputs the rectified signal. The signal rectified by the rectifier 50 is smoothed by a filter composed of a resistor 52 and a capacitor 54, and the smoothed signal is supplied to the power supply terminal of the secondary plug 24 via the output terminals 56 and 58 and the cable 36. It has become so. From the output terminals 56 and 58, for example, signals of DC 100V and 1A are output.

  When the electromagnetically operated switchgear 10 having the above configuration is installed in a place without a power supply, or after the electromagnetically operated switchgear 10 is installed in a place with a power supply, power is not supplied to the switchgear 10 due to an accident or the like. When the power from the system is no longer supplied to the secondary plug connected to the switchboard (control panel), the capacitor 30 is discharged. In such a case, instead of the secondary plug connected to the system via the switchboard, the secondary plug 24 connected to the input power source 38 is attached to the power terminal of the case 22 and then the power is turned on. When the off button 44 is operated to the on side, the DC power generated from the dry battery 46 is converted into AC 100V AC power by the DC / AC converter 48. This AC power is rectified by the rectifier 50, smoothed by the resistor 52 and the capacitor 54, and supplied to the capacitor 30 via the output terminals 56 and 58, the cable 36, and the power supply terminal of the case 22 as DC 100V1A DC power. As a result, energy from the DC power is stored in the capacitor 30. Thereafter, when the closing button 26 of the case 22 is turned on, the energization circuit on the control board 34 is closed in response to the closing operation of the closing button 26, and the energy stored in the capacitor 30 is supplied to the coil of the electromagnet 32. This coil is energized. When the coil is energized, an electromagnetic force is generated from the electromagnet 32, and a driving force associated with the electromagnetic force is transmitted to each vacuum circuit breaker 12, 14, 16 via the link mechanism, and each vacuum circuit breaker 12, 14, 16 is executed.

  According to the present embodiment, even when the capacitor 30 is in a discharged state, such as in an emergency or accident, after connecting the power supply 38 for input through the secondary plug 24 and the cable 36 to the power supply terminal of the case 22, By performing the closing operation of the closing button 26, the vacuum circuit breakers 12, 14, and 16 can be turned on.

  In this case, since the dry battery 46 has a capacity capable of operating the vacuum circuit breakers of a plurality of electromagnetically operated switchgears 10, a plurality of electromagnetically operated switchgears 10 are installed. In addition, a plurality of electromagnetically operated switchgears can be turned on by sequentially connecting the power supply 38 for turning on to each electromagnetically operated switchgear 10 and then turning on the button 26 after being connected.

  Further, since the power supply 38 for making up is configured to be portable, the making operation can be smoothly performed even when the plurality of electromagnetically operated switchgears 10 are turned on.

  As shown in FIG. 4, in addition to the secondary plug 60 connected to the control panel and the capacitor 30, the auxiliary power supply terminal (in parallel with the power supply terminal to which the secondary plug 60 is mounted is connected to the case 22. It is also possible to employ a configuration in which a plug 62 is attached to the auxiliary power supply terminal and the plug 62 is connected to the input power supply 38 via the cable 36. In this case, even in a state where the secondary plug 60 is attached to the power supply terminal, in the case of an emergency or an accident, the power supply 38 for connection is connected to the auxiliary power supply terminal via the cable 36 and the plug 62, so that the capacitor 30 can be supplied with DC power.

It is a perspective view which shows the relationship between the electromagnetically operated switchgear which shows one Example of this invention, and a power supply for injection. It is a perspective view of the power supply for input. It is a circuit block diagram of the power supply for input. It is a perspective view which shows the relationship between the electromagnetically-operated switchgear which shows the other Example of this invention, and the power supply for injection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electromagnetic operation type switchgear 12, 14, 16 Vacuum circuit breaker 26 Input button 30 Capacitor 32 Electromagnet 34 Control board 36 Cable 38 Power supply for input

Claims (4)

A capacitor that receives DC power from the power supply terminal and stores DC power, an electromagnet that contacts or separates the movable iron core and the fixed iron core according to the energization state of the coil, and energization that connects the capacitor and the coil of the electromagnet A control board that closes a circuit in response to a closing operation of a closing button, a shaft that is connected to the movable iron core and transmits a driving force accompanying an electromagnetic force generated from the electromagnet to the link mechanism, and a drive of the link mechanism A switch that contacts or separates the movable contact and the fixed contact according to force, and the movable contact and the fixed contact of the switch are mutually connected according to the electromagnetic force generated from the electromagnet as the energization circuit is closed. When the electromagnetically operated switchgear that is in contact is turned on, a power supply for power supply that outputs DC power is connected to the power supply terminal, and The method of the input solenoid-operated switching devices, characterized in that the closing operation of the emissions. A capacitor that receives DC power from a power supply terminal or an auxiliary power supply terminal and accumulates DC power, an electromagnet that contacts or separates the movable iron core and the fixed iron core according to the energization state of the coil, and the coil of the capacitor and the electromagnet A control board that closes an energization circuit that connects to a closing operation in response to a closing operation of a closing button, a shaft that is connected to the movable iron core and transmits a driving force accompanying an electromagnetic force generated from the electromagnet to a link mechanism, and A switch that contacts or separates the movable contact and the fixed contact according to the driving force of the link mechanism, and the movable contact of the switch according to the electromagnetic force generated from the electromagnet when the energization circuit is closed When the electromagnetically operated switchgear in which the fixed contacts are in contact with each other is turned on, the power supply for output that outputs DC power is connected to the power supply terminal or the auxiliary power supply terminal. The method of the input solenoid-operated on-off device as well as connecting, characterized in that the closing operation of the closing button. A capacitor that receives DC power from the power supply terminal and stores DC power, an electromagnet that contacts or separates the movable iron core and the fixed iron core according to the energization state of the coil, and energization that connects the capacitor and the coil of the electromagnet A control board that closes a circuit in response to a closing operation of a closing button, a shaft that is connected to the movable iron core and transmits a driving force accompanying an electromagnetic force generated from the electromagnet to the link mechanism, and a drive of the link mechanism A switch that contacts or separates the movable contact and the fixed contact according to force, and the movable contact and the fixed contact of the switch are mutually connected according to the electromagnetic force generated from the electromagnet as the energization circuit is closed. When a plurality of electromagnetically operated switchgears that are in contact with each other are turned on, a power supply for supplying DC power is connected to the power supply terminal of each electromagnetically operated switchgear. As well as next connection method of the input solenoid-operated switching devices, characterized in that said sequential closing operation poured button for each solenoid-operated switching devices. 4. The method of turning on / off an electromagnetically operated switchgear according to any one of claims 1 to 3, wherein the turning-on power supply includes a battery that generates DC power and power that converts output power of the battery into AC power. An electromagnetically operated switchgear comprising: a converter; a rectifier that rectifies the output of the power converter; and a filter that smoothes the output of the rectifier.

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