Device and method for testing equipotential closed loop electrical energy meter

Abstract

The invention provides an equipotential closed-loop electrical energy meter testing device, which includes a program controlled three phase power source, a three phase multifunction standard meter, a meter hanging rack, an error calculation / display apparatus, a control system equipped with control software, and a precision current mutual inductor CT insulating the current of the electric energy meter connected to the meter hanging rack, wherein, the program controlled three phase power source outputs voltage to the three phase multifunction standard meter and the electrical energy meter to be tested connected to the meter hanging rack; the program controlled three phase power source outputs current to the three phase multifunction standard meter and the electrical energy meter to be tested through the precision current mutual inductor CT; the error calculation / display apparatus is connected with the three phase multifunction standard meter and the electrical energy meter to be tested; the control system is connected with the program controlled three phase power source, the three phase multifunction standard meter, the electrical energy meter to be tested and the error calculation / display apparatus. The equipotential closed-loop electrical energy meter testing device provided by the invention can verify more electrical energy meters at one time, thereby improving work efficiency of the measurement department and reducing error.

Description

【Technical field】 [0001] The invention relates to a testing device for three-phase potential and closed-loop electric energy meters, in particular to a device for simultaneously testing multiple meters through a precision current transformer CT. 【Background technique】 [0002] In the power system, all kinds of electric energy meters need to verify their electric energy measurement errors before they are connected to the grid. Only those electric energy meters with qualified electric energy errors are allowed to be connected to the network, because the usage of electric energy meters is large. For the three-phase potential and closed-loop electric energy meter, because the voltage high-end terminal and the current terminal cannot be separated, the general inspection device can only inspect one three-phase electric potential and closed-loop electric energy meter during inspection, but when inspecting multiple three-phase electric potential, When the closed-loop electric energy...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a testing device for an equipotential closed-loop electric energy meter, which solves the problems in the prior art that there is a large influence between epitopes and a large error in electric energy when multi-meter detection is performed.

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