Method of generating electrical energy metering quantities in a

Details Method of generating electrical energy metering quantities in a Method of generating electrical energy metering quantities in a

1994-12-16

1996-08-13

Voeltz, Emanuel T.

Boots, shoes, and leggings

364481, 34087002, G01R 1154

Patent

active

055463185

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). These derived quantities are determined from the respective non-derived electrical energy metering quantities, for each of the recorded load profile time intervals. The generation and transfer of the derived electrical energy metering quantities preferably takes place at the time the non-derived quantities are downloaded from internal memory and transferred to the programming unit.

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