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EMI and EMC considerations for energy meters

Posted: 18 Jul 2014  Print Version  Bookmark and Share

Keywords:FXAS21000  FXAS21002  application schematic  software migration  register map 

Energy meters are often tampered with by malicious noise sources to manipulate the energy consumption readings. Thus it becomes a requirement for an energy meter to be fully-functional in challenging noisy electromagnetic environments. Because of this, different type-tests are provided in the IEC metering standards. Meter manufacturers must comply with these tests before supplying their product to the market.

It is a joint responsibility of microcontroller designers and PCB designers to provide protection within the metering system, so that the meters are not affected by a noisy environment.

Freescale introduced the MKM34 series of microcontrollers for the single-phase and three-phase metering markets. This series of microcontrollers has a higher immunity against electrostatic discharge (ESD) and high-frequency noise tampers. The MKM34 series of devices produce good results when integrated within a good PCB design.

View the PDF document for more information.

Originally published by Freescale Semiconductor at www.freescale.com as "EMI EMC Considerations for Energy Meters".





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