JPS6333376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control switch device that can operate a power load switching device at a low voltage using signal communication wiring and display the operation results.

A so-called keep relay is used as a device for opening and closing a power load using signal communication wiring, which is operated by passing an instantaneous current through an electromagnetic coil and is mechanically held in the open or closed position each time. . Use this keep relay to
Form the load end that opens and closes the load as shown in the figure,
It is convenient to operate and display this using an operating terminal with a display circuit. In FIG. 1, the load end 1 is a single-phase full-wave rectifier circuit consisting of four diodes 2, 3, 4, and 5, with one of the AC terminals open as a first terminal 6 and a second terminal 7; An electromagnetic coil 9 connected to the DC terminal of this rectifier circuit opens and closes the main switch 8 of the keep relay, a capacitor 10 connected in parallel to this electromagnetic coil 9, and a capacitor 10 that operates in conjunction with this main switch 8 to open and close the main switch 8 of the keep relay. an auxiliary switching device 11 that connects a switching contact to one of the first terminal 6 and the second terminal 7 as switching contacts;
It includes a power terminal 12 led out from the switching contact of the auxiliary switching device 11 and an operation terminal 13 led out from the other AC side terminal of the rectifier circuit. In addition, the operation end 19 has a power supply terminal 20 and an operation terminal 2.
1, and between the power supply terminal 20 and the operation terminal 21 is a normally open push button switch 16.
For example, a circuit in which a closing indicator light 17 with directionality such as a light emitting diode and an open circuit indicator light 18 are connected in antiparallel is inserted in parallel. A plurality of operation ends 19 can be provided, and each power supply terminal 20 is connected to the load end 1 via a control power transformer 14.
Each operating terminal 21 is commonly connected to an operating line 15' connected to an operating terminal 13 of the load end 1. In the above explanation, power supply 15 and operation line 1
Both 5' are so-called signal communication wiring.

In the circuit of FIG. 1, the switching contact of the auxiliary switching device 11 is connected to the first terminal 6 of the open rectifier circuit as shown by the solid line, so when the push button switch 16 is closed, the switching contact of the auxiliary switching device 11 is connected to the first terminal 6 of the open rectifier circuit. The current of transformer 14 - auxiliary switch 11 - diode 2
The current flows in the direction of - electromagnetic coil 9 - diode 4 - push button switch 16 (in the direction of the solid line arrow) and excites the electromagnetic coil 9, causing the keep relay to operate and close the main switch 8. At this time, the switching contact of the auxiliary switching device 11 simultaneously switches to the second terminal 7 as shown by the broken line.
side, the current in the direction of the solid line arrow is cut off, and a new current flows in the direction of the transformer 14 - push button switch 16 - diode 3 - electromagnetic coil 9 - diode 5 - auxiliary switch 11 (in the direction of the broken line arrow). .
At this time, the capacitor 10 smoothes the half-wave pulsating current rectified by the diode, and since the charge charged in the capacitor 10 flows through the electromagnetic coil 9, the current in the electromagnetic coil 9 continues in the same direction. The keep relay is thus maintained in its operating state. If the push button switch 16 is opened here, the current flows in the direction of the dashed arrow to the indicator light 17.
The indicator light 17 lights up to indicate that the main switch 8 has been turned on. As already mentioned, several operating terminals 19' can be connected in parallel to operate and display information from other locations. At this time, the impedance of the indicator light 17 is much higher than that of the electromagnetic coil 9, so when the number of indicator lights 17 is small, this current is small and does not interfere with the operation of the keep relay. Further, even if this state continues, there is no risk that the electromagnetic coil 9 will overheat. Next, when the pushbutton switch 16 is closed again, the switching contact of the auxiliary switching device 11 is in contact with the second terminal 7 as shown by the broken line, so that the current from the transformer 14 is transferred to the transformer 14.
The current flows in the direction of - push button switch 16 - diode 3 - electromagnetic coil 9 - diode 5 - auxiliary switch 11 (in the direction of the dashed arrow), and excites the electromagnetic coil 9. Therefore, the keep relay operates and opens the main switch 8. At the same time, the auxiliary switch 11 also operates so that the switching contact changes to the first terminal 6 as shown by the solid line.
When the current is switched to the side, the current in the direction of the broken line arrow is cut off, and the current in the direction of the solid line arrow flows. At this time, the current in the electromagnetic coil 9 is continued due to the charge accumulated in the capacitor 10, as described above. When the push button switch 16 is opened, a current in the direction of the solid arrow flows to the indicator light 18, which lights up to indicate that the main switch 8 has been opened. In this case as well, the impedance of the indicator light 18 is much higher than that of the electromagnetic coil 9, so if the number of indicator lights 18 is small,
This current is small and does not interfere with the operation of the keep relay. Furthermore, there is no risk that the electromagnetic coil 9 will overheat.

This remote control switch device can be operated from various locations via several operating ends located remotely via signal communication wiring, and the results can be displayed. However, as already mentioned, current flows through the indicator lamps, so even if the value is small, this has the disadvantage that if the number of indicator lamps increases, this cannot be ignored. For example, even if you use a light emitting diode with very low power consumption,
The limit is 8 for each open circuit indicator light. If this value is exceeded, a current sufficient to operate the keep relay will constantly flow in the electromagnetic coil, resulting in a drawback that the operation of the keep relay will be hindered. Another drawback is that the electromagnetic coil itself is overheated.

Therefore, as shown in FIG. 2, a display terminal 22 is led out from one DC terminal side of the rectifier circuit at the load end 1, and each operation end 19 is provided with a display terminal 23 in addition to a power supply terminal 20 and an operation terminal 21. , the power terminal 20 and the operation terminal 21
The diode 5 is turned on by connecting the power supply line 15 and the operation line 15' in common as shown in FIG. Since it serves as a bypass for the current flowing through the indicator light 17, and the current of the closing indicator light 17 does not flow through the electromagnetic coil 9, a large number of closing indicator lights 17 can be connected in parallel. Numbers remain limited.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a remote control switch device which eliminates the above-mentioned drawbacks and allows the use of a large number of both closing indicator lights and open circuit indicator lights. The object of the present invention is to provide a device in which a load terminal for controlling opening and closing of a load is remotely controlled from a plurality of operating terminals via a common AC power source, and the opening/closing state of the load terminal is displayed on each operating terminal; The load end has a first terminal and a second terminal in which one AC terminal is separated for a normally closed contact and a normally open contact, and is connected in the forward direction to a rectifying arm on the second terminal side. 2
a single-phase full-wave rectifier circuit having diodes, an electromagnetic coil connected between the DC terminals of the single-phase full-wave rectifier circuit and opened and closed by a load keeping operation, and a capacitor connected in parallel to the electromagnetic coil; The first and second
an auxiliary switch with the terminal as a switched contact and a switching contact connected to one of them; a cathode connected to the midpoint of two diodes of the rectifier arm on the second terminal side; and an anode connected to the first terminal; a shunt diode to which is connected, a power terminal led out from the auxiliary switching device, an operation terminal led out from the other AC terminal of the single-phase full-wave rectifier circuit, and a rectifier arm on the second terminal side. and an indicator terminal derived from the midpoint of the two diodes; each of the operating terminals includes a power terminal, an operating terminal, an indicator terminal, and a normally open pushbutton inserted between the power terminal and the operating terminal. Button switch and
Comprising two directional indicator lights inserted between a power terminal and a display terminal and connected in antiparallel to each other; the power terminal of each operating end is connected to the power terminal of the load end via an AC power source. The operating terminal of each operating end is commonly connected to the operating line connected to the operating terminal of the load end; The display terminal of each operating end is connected to the operating terminal of the operating end, or This is achieved by making the display lines connected to the display terminals at the load ends common.

Next, the present invention will be explained in detail based on wiring diagrams according to embodiments. As shown in FIG. 3, the load terminal 1 that controls the opening and closing of the load has a first terminal 6 separated into one AC terminal for a normally closed contact and a normally open contact.
and a single-phase full-wave rectifier circuit having a second terminal 7 and having two diodes 5', 27 and diodes 2, 3, 4 connected in the forward direction to the rectifier arm on the second terminal 7 side; An electromagnetic coil 9 that is connected to the DC terminal of this rectifier circuit and opens and closes the main switch 8 of the keep relay, a capacitor 10 that is connected in parallel to this electromagnetic coil 9, and one side of the rectifier circuit that is connected to the main switch 8. An auxiliary switching device 1 that connects a switching contact to either of the first terminal 6 and the second terminal 7, which constitute the AC terminal, as switching contacts.
In addition, a cathode is provided between the intermediate point between the diode 5' and the diode 26 of the rectifier arm on the second terminal 7 side and the first terminal 6, and a cathode is provided at the intermediate point between the diode 5' and the diode 26 on the second terminal 7 side. is connected to the first
A shunt diode 27 whose anode is connected to the terminal 6 of the circuit is inserted. A power terminal 12 led out from the switching contact of the auxiliary switch 11 and an operation terminal 13 led out from the other AC terminal of the rectifier circuit.
and a display terminal 22 led out from the connection point between the diode 5' and the diode 26. In addition, each operating end 19, 19' is connected to a power terminal 23.
and an operation terminal 24 and a display terminal 25,
A normally open push button switch 16 inserted between the power supply terminal 23 and the operation terminal 24, and two directional displays inserted between the power supply terminal 23 and the display terminal 25 and connected in antiparallel to each other. and lights 17 and 18, each operating end 1
The power supply terminals 23 of 9 and 19' are connected to the power supply line 1 connected to the power supply terminal 12 at the load end via the AC power supply.
5, and the operating terminals 24 of each operating end 19, 19' are commonly connected to an operating line 15' connected to the operating terminal 13 of the load end 1, and each operating end 1
The display terminals 9 and 19' are commonly connected to the display line 15'' which is connected to the display terminal 22 of the load end 1.
Connecting power line 15, operation line 15' and display line 1
Along with 5'', it is a low voltage signal communication wiring.

In the circuit shown in FIG. 3, the switching contact of the auxiliary switching device 11 is in contact with the first terminal 6 of one of the AC terminals of the rectifier circuit as shown by the solid line, so when the push button switch 16 is closed, the current is transferred to the transformer. 14 as a power source, the flow flows in the direction of the transformer 14 - auxiliary switching device 11 - diode 2 - electromagnetic coil 9 - diode 4 - push button switch 16 (in the direction of the solid arrow),
The electromagnetic coil 9 is excited. Therefore, the keep relay operates and closes the main switch 8. At this time, a current flows in the diode 27 in the direction of the double solid arrow, but does not affect the current in the electromagnetic coil 9. At the same time as the main switch 8, the switching contact of the auxiliary switching device 11 is switched to the second terminal 7 side as shown by the broken line, the current in the direction of the solid arrow is cut off, and a new connection is made between the transformer 14 - push button switch 16 - diode 3. -Electromagnetic coil 9
A current flows in the direction of - diode 5' - diode 26 - auxiliary switch 11 (in the direction of the dashed arrow). At this time, the capacitor 10 serves to continue the current flowing through the electromagnetic coil 9 even when the auxiliary switch 11 switches, as described above. Current also flows in the direction of the transformer 14, closing indicator light 17, and diode 26 (in the direction of the double broken arrow), indicating that the main switch 8 has been turned on. Here push button switch 16
When opened, the current in the electromagnetic coil 9 is cut off.

In the remote control switch device according to the present invention, even if a large number of input indicator lights are connected in parallel,
This current does not flow through the electromagnetic coil, so it does not interfere with the operation of the keep relay or overheat the electromagnetic coil. Of course, the number of input indicator lights is determined by the capacity of the power transformer.

Next, when the pushbutton switch 16 is closed again, the switching contact of the auxiliary switching device 11 changes to the second switching contact point as shown by the broken line.
Since the terminal 7 of the transformer is in contact, the current flows through the transformer 1.
4-Push button switch 16-Diode 3-Magnetic coil 9-Diode 5'-Diode 26-
Flows in the direction of the auxiliary switch 11 (in the direction of the dashed arrow),
The electromagnetic coil 9 is excited. Therefore, the keep relay operates and opens the main switch 8. At the same time, the auxiliary switch 11 is also operated and the switching contact is switched to the first terminal 6 as shown by the solid line, so the current in the direction of the broken line arrow is cut off and the current in the direction of the solid line arrow flows. At this time, the current in the electromagnetic coil 9 is continued due to the charge accumulated in the capacitor 10, as described above. At this time, current also flows in the direction of the transformer 14 - auxiliary switching device 11 - diode 27 - open circuit indicator light 18 (in the direction of the solid line double arrow), and the indicator light 18 lights up, indicating that the main switch 8 is open. indicate. When the push button switch 16 is opened, the current in the electromagnetic coil 9 is cut off.

In this remote control switch device, the current of the open circuit indicator light does not flow through the electromagnetic coil 9, so even if a large number of open circuit indicator lights are connected in parallel, there is no risk of interfering with the operation of the keep relay or overheating the electromagnetic coil. do not have. Of course, the number of open circuit indicator lights is determined by the capacity of the control power transformer.

The connection between the load end and the operating end of the remote control switch device according to the present invention can be made as shown in FIG.
, the power terminal 20 connects to the power transformer 14
The operation terminal 21 and the display terminal 23 are commonly connected to the power supply line 15 which is connected to the power supply terminal 12 of the load end 1 through the power supply terminal 12 of the load end 1.
It is also possible to omit the display line by commonly connecting it to the operation line 15' connected to the control line 15'. The operation of this circuit is the first
Since it is the same as the remote control switch device shown in the figure, the explanation will be omitted.

As described above, the present invention is a remote control switch that uses a keep relay to form a load end that controls opening and closing of a load, is operated by a remote operation end via signal communication wiring, and displays the result with an indicator light. This is a device in which a side path consisting of a diode is provided at the load end, and the current of the indicator light is passed through this side path by switching an auxiliary switch that works with the main switch. Since the current does not flow through the electromagnetic coil of the keep relay installed in It is an excellent device that can be increased to a suitable size.

[Brief explanation of the drawing]

1 and 2 are wiring diagrams of a conventional remote control switch device, and FIGS. 3 and 4 are wiring diagrams of a remote control switch device according to the present invention. 1: load end, 2, 3, 4, 5, 5', 26: diode forming a single-phase full-wave rectifier circuit, 6: open first terminal of the rectifier circuit, 7: open terminal of the rectifier circuit Second terminal, 9: Electromagnetic coil, 10: Capacitor, 11: Auxiliary switch, 12: Power supply terminal, 1
3: Operation terminal, 14: Control power transformer, 15: Power line, 15': Operation line, 15'': Display line, 16: Push button switch, 17: Closing indicator, 18: Open circuit indicator, 22: Display Terminal, 23: Power terminal, 24: Operation terminal, 25: Display terminal, 27: Shunt diode.

Claims (1)

[Claims] 1. A device in which a load terminal for controlling opening and closing of a load is remotely controlled from a plurality of operating terminals via a common AC power source, and the opening/closing status of the load terminal is displayed on each operating terminal; , one AC terminal has a first terminal and a second terminal separated for a normally closed contact and a normally open contact, and is connected in the forward direction to a rectifier arm on the second terminal side.
a single-phase full-wave rectifier circuit having diodes, an electromagnetic coil connected between the DC terminals of the single-phase full-wave rectifier circuit and opened and closed by a load keeping operation, and a capacitor connected in parallel to the electromagnetic coil; The first and second
an auxiliary switch with the terminal as a switched contact and a switching contact connected to one of them; a cathode connected to the midpoint of two diodes of the rectifier arm on the second terminal side; and an anode connected to the first terminal; a shunt diode to which is connected, a power terminal led out from the auxiliary switching device, an operation terminal led out from the other AC terminal of the single-phase full-wave rectifier circuit, and a rectifier arm on the second terminal side. and an indicator terminal derived from the midpoint of the two diodes; each of the operating terminals includes a power terminal, an operating terminal, an indicator terminal, and a normally open pushbutton inserted between the power terminal and the operating terminal. Button switch and
Comprising two directional indicator lights inserted between a power terminal and a display terminal and connected in antiparallel to each other; the power terminal of each operating end is connected to the power terminal of the load end via an AC power source. The operating terminal of each operating end is commonly connected to the operating line connected to the operating terminal of the load end; The display terminal of each operating end is connected to the operating terminal of the operating end, or A remote control switch device characterized in that it can be commonly connected to the display line connected to the display terminal at the load end.