System and method for automatically determining the electrical energy service type to which an energy meter is connected

摘要

A system for determining the service type to which an energy meter having meter elements is connected. The system includes a memory for storing reference information relating to different service types. The system determines which meter elements of the energy meter are active, and then determines relative phase angles and phase voltages of the meter elements. The relative phase angles are determined in to be in an ABC or a CBA rotation. Power quality monitoring is used in determining the phase voltages. The relative phase angles and phase voltages are compared to the reference information to determine the service type. The reference information includes services and scaling information, a nominal service voltage, a programmable potential indicator threshold, and a maximum and a minimum tolerance with respect to the nominal service voltage.