KR940022094A - Power Supply Complex Instrument - Google Patents

Abstract

The present invention relates to a power supply complex meter, and converts the current value measured in the current transformer, and measure the effective pulse using the voltage value and the voltage value modulated pulse width measured by the voltage transformer and instrument transformer, the abnormality in the instrument transformer Outputs a phase value at a voltage value via a circuit and a pulse width modulation circuit, and outputs an invalid pulse at the voltage value converted from the current value and the voltage value via the pulse width modulation circuit, thereby providing the effective pulse and phase. It displays the operation status, total power, power for power factor measurement, reactive power for power factor measurement, maximum demand power, current demand power, local time, etc. It is designed to be compatible with the device.

Description

Power Supply Complex Instrument

Since this is an open matter, no full text was included.

1 is a block diagram showing a schematic configuration of the present invention, (a) shows the configuration of analog circuits for power measurement, (b) shows the configuration of digital circuits for analysis and display of power,

2 is an external front view showing the display portions of the present invention, (a) shows the current display state, and (b) shows the display state of the meter reading day.

Claims (3)

In the electric power supply / complex instrument, the first to third current-voltage converters 2a to 2c for converting and outputting current values from the first to third current transformers 1a to 1c, respectively, to voltage values, The first to third pulse width modulators 4a to 4c for pulse width modulating the voltage values from the first to third instrument transformers 3a to 3c and outputting the pulse pole duty cycle, and the above voltages. The voltage values are input from the first to third multipliers 5a to 5c and time-division multiplication is performed according to the pulse width modulation duty cycle, and the first to third multipliers 5a to 5c are instantaneously received. A first integrator 6 for outputting a voltage proportional to the power, a first voltage-frequency converter 7 for outputting an effective pulse with respect to the voltage of the first integrator 6, and the first to the second First to third abnormalities 8a to 8c which phase change voltage values from the three-mechanical transformers 3a to 3c to output an invalid voltage difference, and the first to Fourth to sixth pulse width modulators 9a to 9c for pulse width modulating the reactive voltage values from the third abnormalities 8a to 8c and outputting the pulse width duty cycle, and the first to sixth parts. An imaging detector 10 for detecting a phase of the pulse width duty cycle from the pulse width modulators 9a to 9c and outputting a phase value according to a short circuit or a ground fault, and the first to third current-voltage converters; The fourth to sixth multipliers 11a to perform time division multiplication according to the pulse width duty cycles from the fourth to sixth pulse width modulators 9a to 9c, from (2a) to (2c). (11c), a second integrator (12) for converting and outputting a voltage proportional to instantaneous reactive power with respect to the voltage values from the fourth to sixth multipliers (11a) to (11c), and the second integrator (12). A second voltage-frequency converter 14 for outputting an invalid pulse with respect to the voltage from < RTI ID = 0.0 >), < / RTI > The control unit 16 outputs a power pulse signal, an invalid pulse compensation signal, and an effective pulse compensation signal while receiving the input signal, and a clock generator while receiving the power pulse signals of the effective power amount and the reactive power amount from the central control processor 16. 21, the first to ninth display parts 24, 26, 28, 30, 32, 34, and the switch operation signal are inputted from the time setting pulse and the switch operation part 22. First to ninth display drivers 23, 25, 27, 29, 31, 33, 35, and 37 to 36, 38, and 40, respectively. (39) Operation (Kwh, Kvarh) and state (discrete, blackout), total power, power factor measurement power, reactive power for power factor measurement, no display / read, maximum demand power, cumulative maximum power demand, meter reading The power supply and supply complex meter, characterized in that consists of hardware control processing unit 20 for displaying the power factor and the meter reading date of. The meter control display according to claim 1, wherein the hardware control processing unit 20 displays the elapsed time of the current demand time in two digits (00 to 14) during the current display on the eighth display unit 38 through the eighth display driver 37. The power supply and demand composite meter, characterized in that the power factor of the meter reading date is represented by two digits. The method of claim 1, wherein the hardware control processing unit 20 displays the current time (OO: ××) during the current display on the ninth display unit 40 through the ninth display driver 39, and during the meter reading month / day A power supply and demand multi-function instrument characterized by displaying (OO: ××). ※ Note: The disclosure is based on the initial application.