RU184834U1 - Electrical energy quality control device - Google Patents

Abstract

The utility model relates to instrumentation, in particular, to devices designed to control the quality of electrical energy. The proposed device is supplemented with a galvanic isolation unit in each measuring module, which allows you to artificially limit the transfer of energy from electrical circuits in which measurement is made to the measuring circuit of the device quality control of electrical energy, thereby eliminating the possibility of damage to the device from electrical signals. atom in implementing the claimed solution is to increase the reliability of the device. 1 ill.

Description

The invention relates to a measurement technique, in particular, to devices designed to control the quality of electrical energy.

A device for controlling the quality of electric energy containing a storage device, a liquid crystal indicator, a central processor, a network interface, and from one to fifteen measuring modules, consisting of a scale conversion unit, an analog-to-digital converter unit, an information processing unit, is known to control the values of three-phase voltages and currents. (utility model patent No. 65654).

It is also known a device for controlling the quality of electric energy, containing a storage device, a liquid crystal indicator, a central processor, a network interface, and from one to fifteen measuring modules, consisting of a block of scale transformations, a block of analog-to-digital converters, and a processing unit for measuring information on the quality of electric energy , as well as measure the value of constant voltage (patent for utility model No. 74715).

Closest to the proposed device is a device for monitoring the quality of electric energy containing a storage device, a liquid crystal display, a central processor, an embedded modem, an embedded bridge, a network interface, and from one to fifteen measuring modules, consisting of a scale conversion unit, an analog-to-digital conversion unit, and a unit information processing (patent for utility model No. 81158).

The disadvantages of these devices is that they do not have sufficient protection against overvoltage of input circuits.

Without galvanic isolation, the maximum current flowing between the circuits is limited only by relatively small electrical resistances, which can lead to leaking equalizing currents that can harm both the components of the circuit and personnel touching unprotected equipment. The decoupling device specifically limits the transfer of energy from one circuit to another.

The purpose of the utility model is to increase the reliability of the device by eliminating the possibility of damage to it upon receipt of a high signal level at the inputs and the influence on the controlled device from the device for monitoring the quality of electric energy.

This goal is achieved by the fact that in the device of quality control of electric energy, containing a storage device, a liquid crystal display, a central processor, a built-in modem, a built-in bridge, a network interface and from one to fifteen measuring modules, consisting of a scale conversion unit, an analog-to-digital conversion unit and an information processing unit, wherein a scale conversion unit, an analog-to-digital conversion unit, and an information processing unit of each measurement unit о are connected in series, information processing units of the measuring modules are connected to the central processor via a network interface, the central processor is connected to a storage device, an integrated bridge and an integrated modem, which is connected to the integrated bridge, and the input of the liquid crystal indicator is connected to the output of the central processor, into each measuring module In addition, a galvanic isolation unit was introduced, and in each measuring module I receive the values of the measured voltages and currents the inputs of the block of galvanic isolation, the outputs of which are connected to the inputs of block scaling transforms.

In FIG. 1 shows a block diagram of the proposed device.

The device operates as follows.

Each measuring module (I) is connected to a three-phase electric network and to a constant voltage source. In the galvanic isolation unit (1), the electrical circuits in which the measurement is carried out are galvanically isolated from the measuring circuits of the electric energy quality control device. In the scale conversion unit (2), three-phase voltages and currents, as well as direct voltage, are scaled to the level corresponding to the value of the voltage and current measurement range. The instantaneous values of the signals are converted into digital codes using the block of analog-to-digital conversions (3) and transmitted to the information processing unit (4). Received data arrays via the network interface (5) are sent to the central processor (6). The central processor (6) controls a system in which there is a storage device (7), a liquid crystal display (8), an embedded modem (9) and an embedded bridge (10). Also, the central processor (6) adapts the operating mode of the built-in bridge (10) and the built-in modem (9) to the parameters of the communication channel, taking into account external electromagnetic influences. Data from the measuring modules (I) through the central processor (6), the built-in bridge (10) and the built-in modem (9) are transmitted to the communication channel.

The proposed utility model is connected to a communication line and allows you to transmit information about the measured indicators of the quality of electric energy from remote objects.

The use of galvanic isolation blocks in each measuring module makes it possible to artificially limit the transfer of energy from the electrical circuits in which the measurement is made to the measuring circuits of the electric energy quality control device, thereby eliminating the possibility of damage to the utility model from electrical signals.

Claims (1)

An electric energy quality control device comprising a storage device, a liquid crystal indicator, a central processor, a built-in modem, a built-in bridge, a network interface, and from one to fifteen measuring modules, consisting of a scale conversion unit, an analog-to-digital conversion unit, and an information processing unit, large-scale transformations, the block of analog-to-digital transformations and the information processing unit of each measuring module are connected in series, the blocks the information processing of the measuring modules is connected to the central processor via a network interface, the central processor is connected to a storage device, an integrated bridge and an integrated modem, which is connected to the integrated bridge, the input of the liquid crystal indicator is connected to the output of the central processor, characterized in that each measuring module is additionally introduced galvanic isolation unit, and in each measuring module the values of the measured voltages and currents are fed to the inputs of the unit g lvanicheskoy junctions, the outputs of which are connected to the inputs of block scaling transforms.

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