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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 as "EMI EMC Considerations for Energy Meters".

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