| 主权项 |
1. A power meter comprising:
a voltage sensor input port configured to receive one of single phase AC voltage and three phase AC voltage values; a current sensor input port configured to receive one of single phase AC current and three phase AC current values; a bus connector adapted to be coupled to a data bus; a module connector adapted to be coupled to a module bus; a timer for producing a digitizing clock; and a microprocessor configured to
phase lock the digitizing clock, to a multiple frequency of AC voltage frequency;digitize received voltage values and received current values using the digitizing clock;calculate timing data based on the frequency and the phase of the digitized voltage values;calculate power based on the digitized voltage, the digitized current, and the timing data;communicate the calculated power via the bus connector;serialize the digitized voltage and the timing data; andoutput the serialized digitized voltage and the timing data via the module connector. |
