Hall effect based electrical energy metering device with fraud detection and instantaneous voltage, current and power outputs

Hall effect devices have proven acceptance within electricity metering; specialist Hall multiplier devices having been demonstrated as being capable of meeting specification for static watthour meters. Commercial Hall devices have been available for some time at low cost that perform within specification as current sensors, and when coupled with developments in mixed analogue/digital ASIC technology can produce a cost effective energy meter with the bonus of partial fraud detection as opposed to simple reverse drive detection. The voltage and current waveforms are available prior to multiplication as requested by some countries. It has been demonstrated that a single phase 240 volt meter with a working range of 100 amps can be constructed with a basic resolution of watt seconds (joules). The current range is easily extended by conductor sizing or sensor positioning. The author describes the technology involved in a Hall effect meter