ADE7878 - Polyphase Multifunction Energy Metering
The ADE7878 from Analog Devices is a polyphase multifunction energy metering IC with per phase active and reactive powers. ADE7878 is a high accuracy, 3-phase electrical energy measurement IC with serial interfaces and three flexible pulse outputs.
The ADE7878 incorporates second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs), a digital integrator, reference circuitry, and all the signal processing required to perform total (fundamental and harmonic) active, reactive, and apparent energy measurement and rms calculations, as well as fundamental only active and reactive energy measurement and rms calculations.
A fixed function digital signal processor (DSP) executes this signal processing. The DSP program is stored into internal ROM memory.
ADE7878 Key Features
- Highly accurate; supports EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22 and IEC 62053-23 standards
- Compatible with 3-phase, 3 or 4 wire (delta or wye) and other 3-phase services
- Supplies total (fundamental and harmonic) active/reactive/apparent energy and fundamental active/reactive energy on each phase and on the overall system
- Less than 0.1 % error in active and reactive energy over a dynamic range of 1000 to 1 at TA = 25° C
- Less than 0.2 % error in active and reactive energy over a dynamic range of 3000 to 1 at TA = 25° C
- Supports current transformer and di/dt current sensors
ADE7878 Key Application
- Energy Metering Systems
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