RDMK30XSPEM: MK30X Single-Phase Electricity Meter Reference Design

Overview

The NXP^® MK30X single-phase electricity meter reference design provides a high-performance solution for power measurement in single phase two wire installations targeted towards residential metering.

The reference design has the ability to connect to a ZigBee^® network through the I²C interface and can easily become part of the smart grid network
Firmware for this reference design is based on the MQX^™ real-time operating system and is designed for use in advanced markets
All standard metering values are displayed on a built-in LCD

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Features

Kinetis^® MK30X256 MCU built on the Arm^® Cortex^®-M4 core
5 (60) A current range, nominal current is 5 A, peak current is 60 A
120/230 V AC, 50/60 Hz operational range
Active and reactive power (energy) measurement
Accurate metering function for active and reactive energy: IEC50470-3 class B, 1%
Meter constants (imp/kWh, imp/kVArh): 500, 1000, 2000, 5000, 10000
Four-quadrant measurement
Line frequency measurement (for precision zero-cross detection)
Cost-effective shunt-resistor sensing circuit implementation
Voltage sensing is executed by an inexpensive resistor divider
Cost-effective bill of materials (BOM)
Low-power modes effectively implemented, including the use of built-in RTC
3 V internal battery for proper RTC function
4 x 40 segment LCD, including charge pump (values shown on LCD: V,A,W,Var,VA,kWh, kVarh, cos φ, Hz, time, date)
OBIS identifier on the LCD
Tamper detection via two hidden buttons or digital magnetometer (optional only)
Built-in user push-button
LED pulse outputs (kWh,kVarh)
Optically isolated open-collector pulse output
IEC1107 infrared hardware interface
Optically isolated RS232 interface
JTAG debug interface (non-optically isolated)
2.4 GHz RF interface through a 1322x-LPN daughter card
Powered by 3.3 V SMPS open-frame module (3-rd party solution)
EMC proven design (EN61000-4-2, EN610004-4)
Mechanical dimension — 110 x 190 x 55 mm (w x l x h)
Weight — 370 g approximately

MoreLess

Features

Kinetis^® MK30X256 MCU built on the Arm^® Cortex^®-M4 core
5 (60) A current range, nominal current is 5 A, peak current is 60 A
120/230 V AC, 50/60 Hz operational range
Active and reactive power (energy) measurement
Accurate metering function for active and reactive energy: IEC50470-3 class B, 1%
Meter constants (imp/kWh, imp/kVArh): 500, 1000, 2000, 5000, 10000
Four-quadrant measurement
Line frequency measurement (for precision zero-cross detection)
Cost-effective shunt-resistor sensing circuit implementation
Voltage sensing is executed by an inexpensive resistor divider
Cost-effective bill of materials (BOM)
Low-power modes effectively implemented, including the use of built-in RTC
3 V internal battery for proper RTC function
4 x 40 segment LCD, including charge pump (values shown on LCD: V,A,W,Var,VA,kWh, kVarh, cos φ, Hz, time, date)
OBIS identifier on the LCD
Tamper detection via two hidden buttons or digital magnetometer (optional only)
Built-in user push-button
LED pulse outputs (kWh,kVarh)
Optically isolated open-collector pulse output
IEC1107 infrared hardware interface
Optically isolated RS232 interface
JTAG debug interface (non-optically isolated)
2.4 GHz RF interface through a 1322x-LPN daughter card
Powered by 3.3 V SMPS open-frame module (3-rd party solution)
EMC proven design (EN61000-4-2, EN610004-4)
Mechanical dimension — 110 x 190 x 55 mm (w x l x h)
Weight — 370 g approximately