A Development of Real-Time-Piecewise Meter for Three-Phase Power

Baida Qu

Modern Applied Science, 2008, vol. 2, issue 5, 53

Abstract: Aiming at realising a whole range precision metering for both ultra-lower load power circumstance and normal one, this paper proposed a device for the piecewise real-time metering in terms of load power. The design, at the measuring entrance, took a piecewise inputting real-time load signal from the entrance according to the ratio of its three-phase power; through controlled switching, the load signal measured under different ratio was processed by ATT7022B-type metering chip, and calculated by AT89S52-type MCU under different range; and then was processed to satisfy the output required for the multi-function electrical power metering device. The result of the experiments has demonstrated that the design has realized an error equilibrium over whole range, precise metering and other functions.

Date: 2008
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