ADI Metering ICs Improve Smart-Meter Accuracy

Analog Devices has introduced four energy-metering ICs (integrated circuits), designed to improve the accuracy and performance of commercial, industrial and residential smart meters. A smart meter accurately measures how much electricity is consumed or generated and communicates with the local utility for power monitoring, billing and other purposes. ADI's energy metering ICs enable smart electricity meters to deliver improved customer-billing accuracy, advanced power-quality monitoring and reduced operating costs for utility companies.

Ronn Kliger, energy group director, ADI, said: 'They are able to measure total active and reactive energy with accuracy and dynamic range exceeding Class 0.2 specifications for energy meters. 'One device also offers capabilities to measure fundamental-only energies, which is critical for power-quality measurements,' he added. ADI has formed a dedicated energy group to address the growing technology needs for electric metering, substation automation and emerging applications such as solar/wind generation and energy storage.

The company offers radio frequency, power-line-carrier communication, power management and digital-signal processing in support of smart-grid applications. ADI's ADE7878, ADE7868, ADE7858 and ADE7854 high-accuracy energy-metering ICs are designed for poly-phase configurations, including three- and four-wire wye and delta services. The ICs feature 0.1 per cent accuracy for active and reactive energy measurements over a dynamic range of 1,000 and 0.2 per cent accuracy for active and reactive energy measurements over a dynamic range of 3,000:1.

The products also deliver 0.1 per cent accuracy over 1,000:1 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. The ADE7868 and ADE7878 are able to detect various tamper conditions and are housed in a 40-lead LFCSP (lead-frame chip-scale package).

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