US Patent 10067168 Modular power metering system

A power meter includes a voltage sensor input port configured to receive one of single phase AC voltage and three phase AC voltage values. The power meter further includes a current sensor input port configured to receive one of single phase AC current and three phase AC current values. The power meter further includes a bus connector adapted to be coupled to a data bus. The power meter further includes a module connector adapted to be coupled to a module bus. The power meter further includes a timer for producing a digitizing clock. The power meter further includes a microprocessor.