Correct and incorrect identification training evaluation system for electric energy metering device wiring

Abstract

The present invention is a training and evaluation system for correct and wrong identification of electric energy metering device wiring, which includes a correct and incorrect determination device for electric energy metering wiring, a process intelligent identification device, a secondary side terminal of a transformer, a terminal terminal for an electric energy meter, and a correct and incorrect determination device for electric energy metering wiring The shell is equipped with test output socket, polarity detection socket, RS485 detection socket, phase sequence detection socket, test diagram, 485 test indicator light, polarity test indicator light, phase sequence test indicator light, power switch, 485RST reset button , IRST polarity reset button, ITEST polarity test button, URST phase sequence reset button, UTEST phase sequence test button, the circuit of the electric energy metering wiring correctness and error determination device includes a rectification circuit, an RS485 detection circuit, a current detection circuit and a voltage detection circuit The terminal on the secondary side of the transformer is correspondingly connected to the end terminal of the electric energy meter through three-phase four-wire; the intelligent process identification device includes an electronic monitor, a wireless signal transmitter, a wireless signal receiving device and a control terminal.

Description

technical field [0001] The invention relates to a teaching and training equipment for electrician skills, in particular to a training and evaluation system for identifying correct and wrong wiring of an electric energy metering device. Background technique [0002] Today's electric power industry is developing rapidly. In order to ensure safe, reliable, accurate and economical operation of electric power industry production and electric energy measurement, we must rely on instruments and meters installed on electric power production sites that can measure voltage, current, power, electric energy and other electrical parameters. to guarantee. [0003] The electric energy metering device is the "scale" for electric energy trading, and both the power supply and the consumer attach great importance to it. The accuracy of electric energy metering is not only related to the accuracy of the electric energy metering device, but also closely related to whether the wiring of the mete...

AI Technical Summary

Problems solved by technology

[0005] ① Use instruments and meters: volt-ampere phase meter, field calibrator of electric energy meter or some smart electric energy meter calibrator and electric energy measurement fault error detector for detection; the premise of using this method is that the field has been powered and has a certain load Instruments can only be used for detection under certain circumstances, but this type of detection cannot determine whether there are problems such as reverse polarity and phase sequence mismatch.

[0006] ② Use the light: use the light to align the wires, you can determine the continuity of the wires, but you can’t judge the polarity, and it is time-consuming and laborious, requiring high technical level of personnel; therefore, most of the installers will not use it.

Therefore, based on this kind of psychology, the master may not do his best to teach his apprentices, so the growth rate of technical talents is slow

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