JP4686155B2 - Switch operating power supply - Google Patents

Description

  The present invention relates to an operation power supply device for a switch that can facilitate inspection work of a switch such as a circuit breaker and a disconnect switch using an electromagnetic actuator.

  Conventional switch operating mechanisms such as vacuum circuit breakers and vacuum disconnectors are known that use electromagnetic actuators that generate the necessary operating force to perform open and close operations (for example, patents). Reference 1).

  As shown in FIG. 4, this type of switch opens and closes the interrupting portion 1a that interrupts the current from the upper part of the figure, the wipe spring part 1b that applies a contact load when the interrupting part 1a is closed, and the interrupting part 1a at the lowermost part of the figure. An operation mechanism 1c is arranged and configured. In FIG. 4, the closed state is shown on the right side of the figure, and the open state is shown on the left side of the figure.

  The blocking portion 1a is provided with a three-phase vacuum valve 5 having a pair of electrodes 3 and 4 that can be contacted and separated in a vacuum insulating container 2. On the fixed side outside the vacuum insulating container 2, an upper conductor 6 serving as one electric circuit is fixed to an upper fixing member 8 via a support insulator 7. A movable energizing shaft 9 that is movable in the axial direction is provided on the movable side outside the vacuum insulating container 2 so as to penetrate the lower conductor 10 serving as the other electric path. One end of the insulating operation rod 11 is connected in the axial direction of the movable energizing shaft 9.

  The wipe spring portion 1b has a wipe spring that connects the first movable shaft 12 connected to the other end of the insulating rod 11 and the second movable shaft 13 disposed in the axial direction of the first movable shaft 12. A folder 14 is provided. In the wipe spring folder 14, a wipe spring 15 that applies a contact load between the pair of electrodes 3 and 4 and a buffer member 16 that absorbs an impact force during opening and closing are provided.

  The operation mechanism unit 1c is provided with a rigid connecting beam 17 that connects the second movable shafts 13 for three phases, and an electromagnetic actuator 18. The electromagnetic actuator 18 includes a yoke 19 that forms a magnetic path, a magnetic armature 20 that is provided to move in the yoke 19, a permanent magnet 21 that moves or keeps the armature 20 closed, and an armature that is fixed to the permanent magnet 21. The magnetic core 22 that contacts and separates from the magnetic pole 20, the closed circuit that increases or decreases the magnetic flux in the yoke 19, the open coils 23 and 24, and the armature 20 are sandwiched to penetrate the permanent magnet 21, the core 22, and the yoke 19, and to the connecting beam 17. It is composed of a non-magnetic operating rod 25 connected thereto.

  Here, the closing coil 23 and the opening coil 24 are formed as an integral solenoid coil, and are excited so that a magnetic force in the same direction as the magnetic force of the permanent magnet 21 is generated at the closing time, and in the opposite direction to the magnetic force of the permanent magnet 21 at the opening time. Excitation may be performed so that a magnetic force is generated.

  Further, on both sides of the electromagnetic actuator 18, an open spring 26 of an elastic member that constantly urges the armature 20 in a direction away from the permanent magnet 21 is provided between the connecting beam 17 and the lower fixing member 27.

  When the closed circuit state is set, a control circuit (not shown) to which power is constantly supplied is operated to excite the closed coil 23 in which a magnetic flux in the same direction as the magnetic flux of the permanent magnet 21 is excited to make the armature 20 permanent. The magnet 21 is attracted in the direction. This suction force becomes an operation force at the time of closing, and the operating rod 25, the connecting beam 17, the wipe spring folder 14, and the insulating operating rod 11 are moved together with the armature 20 in the closing direction in the upper part of the figure, and between the electrodes 3 and 4 are moved. Make contact. After the closing, the closing coil 23 is de-energized and the armature 20 is always attracted by the attractive force of the permanent magnet 21.

On the other hand, in the case of the open circuit state, a control circuit (not shown) to which power is always supplied is operated to excite the open coil 24 that generates a magnetic flux in a direction opposite to the magnetic flux of the permanent magnet 21, so The attraction force with the magnet 21 is reduced. Accordingly, in the suction state, the operating force of the open spring 26 is moved to move the operating rod 25 together with the armature 20 in the open direction in the lower part of the figure. Further, the open spring 26 separates the electrodes 3 and 4 to the final position.
Japanese Patent Laid-Open No. 2002-270423 (pages 4-5, FIG. 1)

  The above conventional switch has the following problems.

  When inspecting the switch, the power supply of the control circuit is lost together with the main circuit such as the vacuum valve 5, so that it is impossible to inspect the opening and closing operations of the switch. For this reason, the control circuit is temporarily wired from another power source such as a generator or a battery installed at a location away from the switch. Also, in the electromagnetic actuator 18 equipped with a capacitor, the capacitor is discharged after the loss of the power source, so that another power source is necessary.

  Using a separate power source in this way is because there are both live wires that have been tentatively wired to the switch for a relatively long time and wires that have lost the power source. The inspection work must be complicated.

  Further, the opening operation and the closing operation at the time of inspection are generally performed once each to check whether there is an abnormality such as an impact sound or an opening / closing speed. On the other hand, if wiring is performed from another power source, several other opening / closing operations can be continuously performed. For this reason, after the inspection is completed, from the viewpoint of preventing an erroneous operation, it is necessary to immediately disconnect the separate power source or display an inoperable display, which further complicates the inspection work.

  For this reason, there has been a demand for an operation power supply device for a switch that can reliably operate in an open circuit and a closed circuit at the time of inspection and that can be installed in the vicinity of the switch.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an operating power supply device for a switch that can facilitate the inspection work of the switching operation of the switch when the power supply of the control circuit is lost.

In order to achieve the above object, an operation power supply device for a switch according to the present invention includes a terminal for supplying power to a control circuit of an operation mechanism section of the switch, a capacitor connected between the terminals, and the capacitor The capacitor has a predetermined capacity, and can perform the closing operation and the opening operation only once each time by one charge, and the closing operation and the opening circuit can be performed only once.
After the operation, the residual charge is discharged .

  According to the present invention, an operation power supply apparatus having a capacitor having a capacity capable of reliably performing the operation of the open circuit and the closed circuit once each when charged and a generator for charging the capacitor is provided near the switch to be inspected. Since it is installed, wiring to the switch is easy, erroneous operation after completion of inspection can be prevented, and inspection work can be facilitated.

  Embodiments of the present invention will be described below with reference to the drawings.

  An operation power supply device for a switch according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a configuration of an operation power supply device for a switch according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the operation power supply device for a switch according to an embodiment of the present invention, and FIG. It is a figure explaining operation | movement of the operation power supply apparatus of the switch concerning the Example of invention. In addition, since the structure of a switch is the same as the past, the description is abbreviate | omitted.

  As shown in FIG. 1, the operation power supply device for a switch includes a capacitor 31 having a capacity of several thousand μF in a box 30 and an electromotive force generated in the coil by electromagnetic induction using, for example, a commutator mechanism that charges the capacitor 31. A DC generator 32 to be generated and a control unit 33 for controlling the charging state of the capacitor 31 are housed and are portable.

  Further, a rod 35 is rotatably connected to the rotating body 34 and is led out of the box 30 to the DC generator 32. A handle 36 is detachably attached to the rod 35, and a rotating body 34 is rotated by the handle 36 so that a DC voltage can be generated.

  Next, the circuit configuration of the operation power supply device for this switch will be described.

  As shown in FIG. 2, corresponding to FIG. 1, a DC generator 32, a control unit 33, and a capacitor 31 are configured. The control unit 33 is configured by being divided into a protection unit 40, a display unit 41, and a discharge unit 42.

  A protection resistor 43 and a backflow prevention diode 44 are connected to the protection unit 40 in series with the DC generator 32. A first Zener diode 45 is connected in parallel with the DC generator 32.

  A protective resistor 46, a second Zener diode 47, and a first light emitting diode 48 are connected in series to the display unit 41, and these are connected in parallel with the DC generator 32. Further, the protective resistor 49, the third Zener diode 50, and the second light emitting diode 51 are connected in series, and these are also connected in parallel with the DC generator 32.

  The discharge unit 42 is provided with a three-way switching switch 52, one of which is a terminal for connecting the capacitor 31 in parallel with the DC generator 32 and the other of which is a terminal for connecting the discharge resistor 53 in parallel with the capacitor 31. ing.

  Further, a terminal for connecting to the control circuit 54 for operating the switch is provided between the terminals of the capacitor 31. The control circuit 54 is provided with a closing coil 55 and a closing switch 56 for closing the switch, and a breaking coil 57 and a breaking switch 58 for opening the switch.

  Here, the first Zener diode 45 operates at a predetermined voltage such as 110% of the rated voltage so that the capacitor 31 is not overcharged. Further, the second Zener diode 47 operates at a predetermined voltage such as 110% of the rated voltage, for example, causes the first light emitting diode 48 to emit light, and displays that the charging of the capacitor 31 is completed. ing. This voltage is the maximum operating voltage that can operate the switch.

  Further, the third Zener diode 50 operates from a predetermined voltage such as 75% of the rated voltage, for example, so that the second light emitting diode 51 emits light and can indicate that the charging of the capacitor 31 has started. It has become. This voltage is the lowest operating voltage at which the switch can be operated. For this reason, when the 2nd light emitting diode 51 is not light-emitting, operation of a switch becomes impossible. Thus, in the control part 33, the charging / discharging of the capacitor | condenser 31 is controlled and the display apparatus which displays the state is provided.

  Next, the opening / closing operation of the switch when power is lost will be described.

  An operation power supply device is installed in the vicinity of the switch to be inspected, and the switch 52 is connected to the DC generator 32 side. Further, the control circuit 54 is connected to a terminal of the operation power supply device.

  Then, the rotating body 34 of the DC generator 32 is rotated by the handle 36 to generate electric power, and the capacitor 31 is charged to the maximum operating voltage A higher than the rated voltage B as shown in FIG. In this case, if a planetary gear or the like is used for the DC generator 32, the charging voltage can be kept constant even when the rotational speed is increased.

  When the charging is completed, the closing switch 56 is closed to excite the closing coil 55 and the switch is closed. Then, the capacitor 31 is discharged and drops to a voltage not higher than the rated voltage. However, it does not fall below the minimum operating voltage C. This is one operation.

  Next, the cutoff switch 58 is closed to excite the cutoff coil 57, and the switch is opened. Then, the capacitor 31 is further discharged and lowered to the minimum operating voltage C. As a result, the number of operations is two. After that, since it is lower than the minimum operating voltage C, the switch cannot be opened or closed. Then, after the inspection of the closing operation and the opening operation is completed, the switch 52 is connected to the discharge resistor 53 side, and the electric charge remaining in the capacitor 31 is discharged.

  In these operations, the current of several tens of A and time of several hundred ms are required, and a larger capacity is required in the closed circuit than in the opened circuit. Each closing operation can be performed once. Then, after the inspection is completed, since the opening / closing operation cannot be continued, an erroneous operation can be prevented.

  It should be noted that when the opening / closing operation is performed again as necessary, it can be performed continuously by generating power again from the DC generator 32 and charging the capacitor 31 again.

  In addition, since this operation power supply device is portable, when checking a large number of switches installed in the electrical room, the operation power supply device is sequentially installed in the vicinity of the switch and the capacitor 31 is charged each time. This makes it easy to perform inspection work.

  According to the operation power supply device for the switch of the above embodiment, since the capacitor 31 can be installed in the vicinity of the switch and can perform the circuit opening operation and the circuit closing operation once when charged, the wiring is It is easy to prevent erroneous operation after completion of the inspection of the opening operation and the closing operation, and the inspection work can be facilitated.

  In the above-described embodiment, the opening / closing of the switch has been described by exciting the closing coil 55 and the breaking coil 57. However, the spring is stored by a motor or the like, and the spring operation of opening / closing the switch by the spring force of this spring is performed. Also in the operation mechanism, it can be used as a power source for spring accumulation.

Sectional drawing which shows the structure of the operation power supply device of the switch concerning the Example of this invention. The circuit diagram of the operation power supply device of the switch which concerns on the Example of this invention. The figure explaining operation | movement of the operation power supply device of the switch concerning the Example of this invention. Sectional drawing which shows the structure of a switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Blocking part 1b Wipe spring part 1c Operation mechanism part 2 Vacuum insulating container 3, 4 Electrode 5 Vacuum valve 6 Upper conductor 7 Support insulator 8 Upper fixing member 9 Movable energizing shaft 10 Lower conductor 11 Insulating operating rod 12 First movable shaft 13 First 2 movable shaft 14 wipe spring folder 15 wipe spring 16 buffer member 17 connecting beam 18 electromagnetic actuator 19 yoke 20 armature 21 permanent magnet 22 core 23 closing coil 24 opening coil 25 operating rod 26 opening spring 27 lower fixing member 30 box 31 capacitor 32 DC generator 33 Control unit 34 Rotor 35 Rod 36 Handle 40 Protection unit 41 Display unit 42 Discharge units 43, 46, 49 Protection resistor 44 Diode 45 First Zener diode 47 Second Zener diode 48 First light emitting diode 50 Third Zener diode 5 The second light emitting diodes 52 switch 53 discharge resistor 54 controlling circuit 55 closing coil 56 start switch 57 trip coil 58 cut-off switch

Claims (2)

A terminal for supplying power to the control circuit of the operating mechanism of the switch;
A capacitor connected between the terminals;
A DC generator for charging the capacitor;
The capacitor has a predetermined capacitance, and once the closing operation and opening operation on a single charge
Can not do,
An operating power supply device for a switch, wherein after the closing operation and the opening operation are performed, residual charges are discharged . 2. The operation power supply device for a switch according to claim 1, wherein the operation mechanism unit of the switch includes a permanent magnet, an armature, and a solenoid coil.

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