Assignee:
General Electric Company - New York NY
International Classification:
G01R 1154
Abstract:
A method of generating electrical energy metering quantities in a multi-channel load profile recorder includes the steps of sensing a line quantity such as a line current and/or a line voltage, during a load profile time interval. Non-derived electrical energy metering quantities such as watt-hours, var-hours, volt. sup. 2 -hours, ampere. sup. 2 -hours, etc. , are then generated upon completion of the load profile time interval. The non-derived quantities are determined from the sensed line quantities and are preferably stored in non-volatile programmable read-only memory (PROM) in the recorder. These steps are then repeated for each of the subsequent consecutive time intervals so that a load profile record or "database" of non-derived metering quantities can be established in the memory. This record can then be retrieved on a periodic basis by a utility field operator, preferably using a hand-held or portable programming unit such as a computer. At the time of retrieval, the internal load profile record is supplemented by the generation and transfer of derived electrical energy metering quantities, such as volt-ampere-hours (VAh) and power factor (PF).