Energy metering ICs
3 February 2010
Power Electronics / Power Management
Four new energy metering ICs from Analog Devices are targeted at improving the accuracy and performance of commercial, industrial and residential smart meters.
The ADE7878, ADE7868, ADE7858 and ADE7854 are designed for polyphase configurations, including three and four wire, wye and delta services. The ICs feature 0,1% accuracy for both active and reactive energy measurements over a dynamic range of 1000:1 and 0,2% accuracy for both active and reactive energy measurements over a dynamic range of 3000:1. The new products also deliver 0,1% accuracy over 1000:1 dynamic range for RMS (root-mean square) current and voltage measurements.
In addition to per-phase and neutral-energy measurements, the ADE7868 and ADE7878 are able to monitor energy quality parameters such as sag, peak, period, angle measurements and phase sequence. They are also able to detect various tamper conditions while continuing to operate properly, thereby reducing field calls and meter troubleshooting time.
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