Power Electronics / Power Management


Three-phase single chip metering IC

23 October 2002 Power Electronics / Power Management

Analog Devices' ADE7752 is a three-phase electrical energy metering IC with watt-hour output. Compatible with a wide range of three-phase grid configurations including direct connect and transformer operated, 3-wire and 4-wire distribution - it can be used in three-phase commercial and industrial revenue meters or submeters, three-phase motors or generators, and industrial control and utility automation applications. It has less than 0,1% linearity error over a dynamic range of 500 to 1, and operates with a single 5 V power supply. Built-in analog front end is optimised for direct interface with a current transformer. Also, average real power in the form of two selectable frequency pulses can directly register energy consumption on a stepper motor counter display. A low start-up current of 0,04% of basic current - 10 times better than IEC standards - eliminates any creep effect during a no-load condition.





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