JPH05115138A - Switch information terminal device - Google Patents

Abstract

PURPOSE:To provide a switch information terminal device which consumes the reduced quantity of current and by which switch information can be normally transmitted even if the period wherein a.c. power is not applied to a switch contact reading device due to a power failure continues for a long time and which contributes the size reduction of the whole device. CONSTITUTION:In the title switch information terminal device, the information about the operating state of a consumer's power switch A is collected by a switch state reading device B and this information is transmitted to a state monitor D at a power plant, etc., through a communicating and transmitting device C. This terminal is provided with a power device E to drive the switch state reading device B and a switching device F to supply power from the power device E or to stop the supply of the power. In this terminal device, a controlling device G which gives a circuit closing command to the switching device F only for the period wherein the switch reading device B operates is also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects switch status information when a power switch of a power consumer is opened due to a power failure or a ground fault, and the collected power condition information is transmitted through communication transmission means to a power station or a control station. The present invention relates to a switch information terminal device for transmitting to a status monitoring device such as.

[0002]

2. Description of the Related Art Switchgear information terminal devices are used for power switchgear switch information of electric power consumers, that is, information that the power switchgear is in an open state due to a lightning strike, an overload, or a ground fault. Its main function is to transmit information that the protective relay has been activated and the power switch has been opened to the condition monitoring device at the power station.

An example of this type of conventional switch information terminal device is shown in FIG. This is because the control means (internal control circuit) CC including the microcomputer 1, the program memory 2, the data memory 3, and the parameter setting circuit 4 is the open / closed state of the contacts 51, 52 which are interlocked with the power switch of a power consumer (not shown). (Switch information)
Is read by the switch contact read circuit 6 described later, and this information is transmitted to the state monitoring device installed at the power station by the communication transmission circuit 7.

As shown in FIG. 5, the switch contact read circuit 6 has an AC / D for converting DC from an AC power supply 11.
A C converter 12, a backflow prevention diode 13, and
The DC output level of the converter 12 is converted to a predetermined value, that is, the power supply level for the switch contact read circuit 6 and applied to the power supply terminal PWS1, and the battery 15 is constantly charged by the output of the converter 12. And a DC / DC converter 18 for converting the DC output level of the converter 12 to a predetermined value, that is, the power supply level of the control means CC and applying it to the power supply terminal PWS2. There is.

The power supply unit 10 having such a configuration is used because the switch contact read circuit 6 itself does not apply the AC power 11 due to a power failure or the like. The state of 51 is normally read and can be transmitted to a state monitoring device such as a power station. Therefore, the battery 15 that is constantly charged is provided,
The switch contact read circuit 6 is always operable even when the AC power supply 11 has a power failure. The display circuit 8
The switch status can be displayed.

FIG. 6 is a diagram showing a specific circuit of the switch contact read circuit 6 of FIG.
Capacitors 63 and 64, buffer 65, resistors 66 to 7
It consists of 5. The output voltages of the converters 14 and 18 of the power supply device 6 are applied to the power supply terminals PWS1 and PWS2.

Now, when the power switch is closed, the contact 51
Is closed, the photocoupler 61 is turned on, switch contact read information, for example, "1" is given to the microcomputer 1 via the buffer 65, and the contact 14 is opened when the power switch is opened. Then, the photo coupler 61 is turned off, and the switch contact read information, for example, “0” is sent to the microcomputer 1 via the buffer 65.
Is given.

FIG. 7 shows the microcomputer 1 at this time.
Is a flow chart for explaining the operation of the switch contact read circuit 6 when the microcomputer 1 gives a read command to the switch contact read circuit 6, and the switch contact read circuit 6 operates to read the switch contact read information. 1 (s1). The actual state of the switch is determined based on the switch contact read information (s2),
The result of this determination is displayed on the display circuit 8 (s3). Next, it is judged whether or not the polling of the terminal is “present” (s4), and if it is “present”, the switch information is transmitted to the state monitoring device through the communication transmission circuit 7 (s4).
5) After that, the process returns to s1 and the switch contact of another terminal is read. When the polling of the terminal is "absent" in s4, the process returns to s1 and the switch contact of another terminal is read.

[0009]

In this way, the switch contact state can be read by the switch contact read circuit 6, but this switch contact state is read by the microcomputer 1 during processing. However, since the power supply device 10 is always applied to the switch contact reading circuit 6 when the contact 51 is in the closed state, the resistors 66, 67 and 68 are connected to the photocoupler 61.
Current always flows through. For this reason, the current consumption increases even when the contact state of the switch is not read, and the power supply 1
This is inconvenient for reducing the duration of operation of the AC power supply 11 of 0 when a power failure occurs or for downsizing the equipment.

The present invention can reduce the current consumption, and can normally transmit the switch information even if the AC power is not applied to the switch contact reading means for a long time due to a power failure or the like, and the entire device is small in size. It is an object of the present invention to provide a switch information terminal device that can be realized.

[0011]

In order to achieve the above object, the present invention, as shown in FIG.
The operation state information of the switch state reading means B is collected, and this state information is transmitted to the state monitoring device D such as a power station through the communication transmitting means C, and the switch state reading means B is operated. In a switchgear information terminal device having a power supply device E and a switch means F for stopping the supply of electric power from the power supply device E, a control means for giving a closing command to the switch means F only while the switch reading means B is operating. It is equipped with G.

[0012]

According to the present invention, the closing instruction is given to the switch means F only while the switch reading means B is operating, so that the current consumption can be reduced and the power failure of the AC power source continues for a long time. However, since the device can operate normally and the battery capacity can be reduced, the entire device can be downsized.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. The overall configuration of the switch information terminal device is shown in FIG.
2 and FIG. 3 for the operations of the switch contact read circuit 6 and the microcomputer 1 different from those in FIG.
Will be described. FIG. 2 shows a circuit diagram of the switch contact read circuit 6, and the circuit diagram of FIG.
Photocoupler 81, transistor 82, resistors 83, 8
The difference is that 4,85 are provided. Microcomputer 1
Between the driver 80 and the photocoupler 8 between the power supply terminal PWS2 and the power supply terminal PWS2.
The light emitting element side of No. 1 and the resistor 83 are connected in series, and the resistors 84 and 85 are connected in series between the light receiving element side of the photocoupler 81 and the power supply terminal PWS1.
The base of the transistor 82 is connected to the connection point with the, the emitter is connected to the power supply terminal PWS1, and the base is connected to one ends of the resistors 66 and 70, respectively.

A switch contact read circuit 6 having such a configuration
In the above, when a signal is given from the microcomputer 1 and the output signal of the driver 80 becomes “1”, the photocoupler 81 is turned on, and current flows through the contacts 51 and 52 only when the transistor 82 is turned on at this time. .. That is, the microcomputer 1 can control the current flowing through the photocouplers 61 and 62 through the resistors 66 and 70 and the resistors 68 and 72, and the current flowing through the photocoupler 81 through the resistors 83 and 84.

FIG. 3 is a flow chart for explaining the operation of the microcomputer 1 when the output signal of the driver 80 becomes "1", at which time the switch contact read circuit is "powered on" ( s6). After that, the switch contacts 51, 52 ... Are read by the microcomputer 1 (s1). After the switch contacts 51, 52 ... Are read, the microcomputer 1 drives the driver 8
0 is turned off, and the power supply of the contact reading circuit 6 is turned off (s7). The subsequent operation is similar to that of FIG. 7.

According to this embodiment described above, the microcomputer 1 sets the output signal of the driver 80 to "1" only when the switch contacts 51, 52 ... Are read, so that the switch contact read circuit is provided. 6, the current consumption can be reduced, so that normal operation can be performed even when the AC power supply 11 in FIG. 5 continues to be out of power for a long period of time, the capacity of the battery 15 can be reduced, and the entire device can be downsized.

[0017]

According to the present invention described above, the current consumption can be reduced, and the transmission of switch information is normal even if the AC power is not applied to the switch contact reading means for a long time due to a power failure or the like. In addition, it is possible to provide a switchgear information terminal device that can be downsized and the entire device can be downsized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a switch information terminal device according to the present invention.

FIG. 2 is a circuit diagram of a switch reading circuit which is a part of the switch state reading means of FIG.

FIG. 3 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 4 is a block diagram showing an example of a conventional switch information terminal device.

5 is a circuit diagram of the power supply device of FIG.

6 is a circuit diagram showing a switch reading circuit of FIG. 4;

7 is a flowchart for explaining the operation of FIG.

[Explanation of symbols]

PWS1, PWS2 ... Power supply terminals, 1 ... Microcomputer, 2
... program memory, 3 ... data memory, 4 ... parameter setting circuit, 51, 52 ... switch contact, 6 ... switch contact reading circuit, 7 ... communication transmission circuit, 80 ... driver, 81
... Photo coupler, 82 ... Transistor, 61, 62 ... Photo coupler, 66, 70, 68, 72, 83, 84, 8
5 ... Resistor, 11 ... AC power supply, 15 ... Battery.

Claims (1)

[Claims] 1. An operation status information of a power switch of an electric power consumer is collected by a switch status reading means, and the status information is transmitted to a status monitoring device such as a power station through a communication transmission means. In a switch information terminal device having a power supply device for operating the switch status reading means and a switch means for stopping the supply of electric power from the power supply device, a closing command is issued to the switch means only while the switch reading means operates. A switch information terminal device provided with a control means for providing a switch.