ICs tackle accuracy in multiphase-metering applications

Addressing the need for accuracy in multiphase metering, Analog Devices recently announced four energy-metering chips that focus on improving the accuracy and performance of commercial, industrial, and residential smart meters. The ADE7878, ADE7868, ADE7858, and ADE7854 chips target use in polyphase configurations, including three- and four-wire wye and delta services. The devices measure both reactive and active energy with 0.1 percent accuracy. The ADE7878 can measure fundamental-only energies that power-quality measurements use. The ICs feature 0.1 percent accuracy for both active- and reactive-energy measurements over a dynamic range of 1000 to 1 and 0.2 percent accuracy over a dynamic range of 3000 to 1. Prices range from $5.34 (1000) for the most basic version to $7.47 for the ADE7878.

Analog Devices

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Analog Devices’ ADE78XX family of smart-meter chips measures both reactive and active energy with 0.1 percent accuracy.