Hello.
1 phase. voltage, current and Power.
-The voltage range is 220v AC.
-The current range is 0 to 20A.
1. Use MSP430FE42x MCU with shunt resistor.
http://focus.ti.com/docs/prod/folders/print/msp430fe4272.html
2.Analog Devices ADE7569 MCU with shunt resistor.
http://www.analog.com/en/analog-to-digital-converters/energy-measurement/ade7569/products/product.html
3.Analog Devices ADE7763 IC + simple MCU with shunt resistor.
http://www.analog.com/en/analog-to-digital-converters/energy-measurement/ade7763/products/product.html
Thanks Help...