JPH0610818U - Digital measurement / monitoring control device - Google Patents

Abstract

(57) [Abstract] [Purpose] One digital measuring and monitoring control device measures and monitors a distribution line system with multiple circuits. [Arrangement] A terminal block for relaying analog data for a plurality of circuits, a connector 11, and an A / D having a capacity that is a plurality of times larger than usual
The converter 12 is provided, and a circuit selection button for manually selecting a circuit to be measured / monitored is newly provided to perform a circuit selection process. [Effect] It is sufficient to provide a space for one digital measurement / monitoring control device, and the user can easily measure the state of each circuit while looking at the display section of one digital measurement / monitoring control device. Be able to monitor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention directly samples current values, voltage values, etc. in power distribution equipment for general consumers, digitally calculates them with a microcomputer, calculates and displays various measured values, and displays failures and alarms. The present invention relates to a digital measurement / monitoring control device that automatically outputs a control signal for a circuit breaker.

[0002]

[Problems to be solved by conventional techniques and devices]

 The digital measurement / monitoring control device measures analog quantities such as phase current values and line voltage values of general customer power distribution equipment, displays fault input and alarm input status, and outputs circuit breaker control signals. Device. FIG. 6 is a diagram showing a conventional digital measurement / monitoring control device 2a, 2b, 2c installed in a distribution line system having a plurality of circuits 1a, 1b, 1c, the number of which corresponds to the number of circuits of the distribution line. The digital measurement / monitoring control devices 2a, 2b, 2c are installed, and the items such as the voltage value and the current value of each circuit 1a, 1b, 1c are individually measured by the respective digital measurement / monitoring control devices 2a, 2b, 2c.・ I was watching.

Therefore, as shown in FIG. 7, for example, a plurality of digital measurement / monitoring control devices 2a, 2b, 2c are housed in each of the mounts A, B, C corresponding to each circuit of the distribution line on the surface of the monitoring control panel. As a result, the installation space needed to correspond to the number of digital measurement / monitoring control devices, and the number of man-hours for installing the digital measurement / monitoring control devices also increased in accordance with the number of digital measurement / monitoring control devices. In addition, the user had to move his body and inspect each digital measuring and monitoring control device.

Therefore, an object of the present invention is to solve the above technical problems and provide a digital measurement / monitoring control device capable of measuring / monitoring a distribution line system having a plurality of circuits by one unit. That is.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a digital measurement / monitoring control device of the present invention comprises a terminal block having a number of terminals capable of inputting analog data for a plurality of circuits in a system, and data digitally input through the terminal block. It has a memory to store the data and a circuit selection button to manually select the circuit to be measured / monitored, and reads the data of the selected line from the memory according to the selection status of the circuit selection button. The measurement / monitoring process is performed based on the read data.

[0006]

[Action]

 According to the above configuration, analog data for a plurality of circuits of the system is input through the terminal block and stored in the memory, and when the circuit selection button is operated, the memory is selected according to the selected state. The data on the line is read, and the measurement / monitoring process of the circuit is performed based on the read data. Therefore, by operating the circuit selection button, the desired circuit can be measured and monitored by one digital measuring and monitoring controller.

[0007]

【Example】

 Embodiments will be described in detail below with reference to the accompanying drawings. FIG. 2 is a perspective view showing an installation state of a digital measuring / monitoring control device capable of measuring / monitoring control of multiple circuits by one unit. One of the mounts A, B, and C corresponding to a plurality of circuits is shown in FIG. The digital measurement / monitoring control device 2 of the stand is housed in the panel of the stand A. Note that 3a to 3c and 4 are circuit breakers, and a terminal block (described later) capable of inputting analog data for a plurality of circuits is connected to a distribution line on the back side of the gantry A.

FIG. 1 is a circuit diagram of the digital measurement / monitoring control device 2. From a connector 11 and a connector 11 for inputting analog data such as current and voltage in each circuit of a general customer distribution facility through a terminal block. A / D converter 12 for A / D converting the input data of A, contact input circuit 14 that accepts fault input such as overload, short circuit, ground fault, etc. of each circuit through connector 13 and alarm input such as transformer overheat, power failure, etc. Contact output circuit 16 that outputs circuit breaker control signals such as manual / normal switching of each circuit, circuit breaker status display, circuit breaker ON operation, circuit breaker OFF operation, etc. through connector 15, push button switch 17, Settling unit 18, phase current values A _R , A _S , A _T , line voltage values V _RS , V _ST , V _TS , power value W, power amount WH, reactive power value WVAR, reactive power amount WVARH, the power factor PF, frequency F, earth type instrument transformer voltage value GV _R, GV _S, calculates the GV _T, the maximum zero-phase voltage value MV ₀ or the like, based on the input set point to SeiJobu 18 A CPU 20 for performing arithmetic processing, a RAM 19 for storing the data calculated by the CPU 20, a result of arithmetic processing, etc., a panel display section 21, and a transmission section 22 for exchanging data with a central personal computer.

Since the connector 11 inputs analog data for a plurality of circuits, the number of pins is a multiple of the normal number, and the A / D converter 12 also has a capacity of a multiple of the normal amount. As shown in FIG. 3, the other end of the connector 11 is connected to the secondary sides of the auxiliary transformer AUX PT and the auxiliary current transformer AUX CT, respectively. In addition, the primary side of the auxiliary transformer AUX PT and auxiliary current transformer AUX CT is connected to the secondary side of the transformer PT and the secondary side of the current transformer CT, which are attached to the distribution line, as before.

Since the auxiliary transformer AUX PT and the auxiliary current transformer AUX CT measure and monitor the distribution lines for a plurality of circuits, a plurality of them are provided and all are housed in one terminal block 23. There is. FIG. 4 is an external front view of the digital measurement / monitoring control apparatus 2. The front panel has a RUN lamp 31, a digital display 32, a display selection lamp 33, a circuit selection button 34, a display change push button 35, and 1. Push button 36 for displaying secondary side converted rated value, push button 37 for turning on / off, device abnormality lamp 38, failure / alarm indicator 39, reset button 40, manual / normal indicator 41, breaker on / off state indicator 42 Etc. are provided.

The circuit selection button 34 is a characteristic part of the embodiment and is used to select a circuit (three circuits in the figure) which is a target of measurement / monitoring. The RUN lamp 31 is a lamp for notifying the operation of the digital measurement / monitoring control device 2. The digital display 32 is a display for digitally displaying the calculated values of the phase current values A _R , A _S , and A _T , the line voltage values V _RS , V _ST , and V _TS . The display selection lamp 33 is a lamp that indicates the item displayed by the digital display 32. The display change push button 35 is a button used to move the display selection. The turn-on / turn-off push button 37 is for instructing the turn-on / turn-off of the digital indicator 32. The push button 36 for displaying the primary side converted rated value is used to display the rated value of the primary side converted of the transformer PT and the current transformer CT of each item. The device abnormality lamp 38 is a lamp that lights up when an abnormality occurs in the digital measurement / monitoring control device 2 (for example, battery deterioration, internal communication abnormality). The failure / alarm display 39 is a display for latching and displaying the contact input state through the connector 13. The reset button 40 is a button for returning the failure / alarm display.

The interrupt operation of the CPU 20 in response to the operation of the circuit selection button 34 will be described with reference to the flow chart (FIG. 5). First, it is checked whether or not the new circuit selection button 34 has been pressed (step S1), and if it has been pressed, the state of the circuit selection button 34 that has been latched in the RAM up to now is erased (step S2). The state of the new circuit selection button 34 is latched in the RAM 19 (step S3). Then, the phase current values A _R , A _S , A _{T of} the circuits (that is, the selected circuits) corresponding to the state of the circuit selection button 34 latched in the RAM 19 and the line voltage values V _RS , The calculated values of V _ST , V _TS, etc. are read (step S4), and thereafter, various calculation processing is performed in the CPU 20 as in the conventional case, and the calculated values and the primary side conversion rated values are displayed on the digital display 32. An alarm signal is displayed on the failure / alarm display 39 (step S5).

As described above, the terminal block 23 that relays analog data for a plurality of circuits, the connector 11, and the A / D conversion unit 12 that has a capacity that is a multiple of the normal capacity are provided for measurement and monitoring. A circuit selection button 34 for manually selecting a circuit is newly provided to perform the circuit selection processing of steps S1 to S4, so that one digital measurement / monitoring control device can measure and monitor a plurality of circuits. Can correspond to.

[0014]

[Effect of device]

 As described above, according to the digital measurement / monitoring control device of the present invention, one digital measurement / monitoring control device can perform digital measurement / monitoring of a plurality of circuits. It suffices to provide a space for one digital measurement / monitoring control device 2, and the user can easily measure and monitor the status of each circuit while looking at one digital measurement / monitoring control device 2. You will be able to do it. Also, since only one digital measuring / monitoring control device is required, installation work will be simplified.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention in which a single unit measures multiple circuits.
It is a circuit diagram of a digital measurement / monitoring control device capable of monitoring control.

FIG. 2 is a perspective view showing an installation state of the digital measurement / monitoring control device according to the embodiment.

FIG. 3 is an internal circuit diagram of a terminal block 23 and the like including a plurality of auxiliary transformers and a plurality of auxiliary current transformers.

FIG. 4 is a diagram showing a front panel of a digital measurement / monitoring control device.

FIG. 5 is a CPU 20 in response to an operation of a circuit selection button 34.
3 is a flowchart explaining the interrupt operation of FIG.

FIG. 6 is a diagram showing a distribution line system having a plurality of circuits and a plurality of conventional digital measurement / monitoring control devices installed for each circuit.

[FIG. 7] Digital measuring / monitoring control devices 2a, 2 for each of pedestals A, B, C corresponding to each circuit of the distribution line.
It is the conventional layout drawing which accommodated b and 2c.

[Explanation of symbols]

 2 Digital measurement / monitoring control device 12 A / D converter 19 RAM 20 CPU 23 Terminal block 34 Circuit selection button

Claims (1)

[Scope of utility model registration request] 1. An analog data such as a current value and a voltage value of a system is sampled, digitally calculated by a microcomputer, various measured values are calculated and displayed, and a failure / alarm is displayed to display a circuit breaker. In a digital measurement / monitoring control device that automatically outputs control signals, a terminal block that has the number of terminals that can input analog data for multiple circuits in the system, and a memory that stores the digitally converted data input through the terminal block , Has a circuit selection button for manually selecting a circuit to be measured / monitored, and reads out the data of the line related to the selection from the memory according to the selection state of the circuit selection button. A digital measurement / monitoring control device characterized by performing measurement / monitoring processing based on data.