초록 ▼

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 re

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.

대표청구항 ▼

[ What is claimed is:] [1.] A system for determining the service type to which an energy meter having at least one meter element is connected, comprising:storage means for storing reference information reflective of at least one service type;means for determining which of said meter elements of said

[ What is claimed is:] [1.] A system for determining the service type to which an energy meter having at least one meter element is connected, comprising:storage means for storing reference information reflective of at least one service type;means for determining which of said meter elements of said energy meter are active;means for determining a plurality of relative phase angles of said active meter elements;means for determining a plurality of phase voltages of said active meter elements; andmeans for retrieving said reference information from said storage means and comparing said relative phase angles and said phase voltages with said reference information to determine the service type.