Three-phase high-efficient great-error electric energy detecting and calculating apparatus

Abstract

The invention discloses a three-phase high-efficient great-error electric energy detecting and calculating apparatus which comprises a three-phase electric meter check meter and a referential signal input module, wherein the three-phase electric meter check meter comprises a voltage locking module, a detecting and calculating module, a determination module and an output display module. The referential signal input module is connected with the voltage locking module, the voltage locking module is connected with the detecting and calculating module, the detecting and calculating module is respectively connected with an electric meter to be checked and the determination module, and the determination module is connected with the output display module. Only one-time prediction amount of a hand-operated input module or voltage prediction module of the referential signal input module is needed to input referential voltage signal data to the voltage locking module and to lock the data. The electric meter to be checked can be checked by using the data, and no real-time voltage value is needed during calculation. Original verification function is retained, wiring means is simplified to realize rapid measurement, and the work efficiency is greatly improved. Connecting a voltage wire is not needed, which means no connecting a bare part of a power supply. The safety level is greatly improved.

Description

technical field [0001] The invention relates to the field of calibration of electric energy metering devices, in particular to a three-phase fast detection and calculation high-error electric energy meter device. Background technique [0002] The traditional energy meter measurement and verification device needs to collect voltage and current, and compare and verify the measurement accuracy of the energy meter measurement device by comparing the energy measurement with the pulse and revolution number of the energy meter measurement device. [0003] The reason for the high error metering device: man-made electricity theft, the purpose of which is to measure less or even not measure the energy meter, so the method of changing the secondary wiring of the metering circuit is generally used. The main methods are: [0004] a. Loss of voltage: that is, a certain phase or all phases of the metering circuit, voltage leads, etc. are removed, so that the meter only has current and no v...

AI Technical Summary

Problems solved by technology

[0014] see figure 1 and figure 2 , which are the wiring diagrams of the three-phase three-wire watt-hour meter 2' and the three-phase four-wire watt-hour meter 3' and the three-phase watt-hour meter calibrator 1' during calibration. It can be seen from the figure that in the calibration At this time, the three-phase watt-hour meter calibrator 1' needs to be connected to the voltage line for calibration, which is time-consuming on the one hand, and on the other hand, because it needs to be connected to the voltage line and needs to touch the naked part of the power supply, there is a great potential safety hazard

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