Semiconductor manufacturer Renesas Electronics Europe has launched a smart meter reference platform that aims to save time during the design phase of a billing polyphase meter.
Bill it!-Smart Meter RX21A claims to allow engineers to save time by eliminating the need to design their own metrology and calibration routines while complying with Cenelec standards for EMC and safety.
The meter reference platform is based on Renesas’ RX21A group of microcontrollers (MCUs), which integrate the metrology front end and the application processor in a single chip.
The platform can accommodate single-phase, split-phase and three-phase plus neutral billing electricity meters due to group devices being equipped with three, four or seven independent 24-bit delta-sigma analogue-digital converters.
How it works
The solution includes a PC graphical user interface (GUI) allowing developers to analyse data measured by the analogue-digital channels.
This covers both graphical feedback from the ADC data as well as prepared data after the calibration steps, frequency analysis and separation of active/reactive energy use.
Each kit contains the Bill It! Polyphase Meter, a CD-ROM including the embedded metrology and calibration software source code, the PC GUI, the board schematics, the bill of materials, Gerber files, user manual, quick start guide and the electrical connection setup needed to use the electricity meter.
The analogue-digital channels include a programmable gain amplifier (PGA), which allows the target meter to cover a dynamic range between 10mA and 100A at enhanced temperature range.
By storing calibration data in the flash, the RX21A devices cover applications better than Class 0.2S, thus exceeding the most stringent IEC metering requirement presently available, the IEC62053-22.
Launching at EUW14
Renesas will showcase the “Bill It!” kit on its stand at the European Utility Week 2014 show, taking place in Amsterdam from November 4 to 6 in Hall A6, Stand 243, as part of the ‘Connect with Tomorrow’.
The company first launched its full reference platform for the RX21A group of 32-bit microcontrollers (MCUs) for smart electricity meters in May 2013.