Digital input electric power system panel meter
AssigneeSchweitzer Engineering Laboratories, Inc.
InventorsEdmund O. Schweitzer, III, Krishnanjan Gubba Ravikumar, Austin Edward Wade
Life of this patent
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Abstract
Systems and methods for displaying electric power system metering information in a panel may use digitized signals from primary protection relays. The system may include multiple panel meters. One or more of the panel meters may receive the digitized signals using an electrically non-conductive communication media. In various embodiments, the panel may be electrically isolated from the primary protection relay. The panel may be hot swappable and may be connected to a primary protection relay while the relay is in continuous operation.
Claims18
An electric power system panel meter, comprising:
- a digital input to receive a plurality of digitized signals from at least one primary protection relay;
- a non-transitory computer-readable storage medium comprising computer instructions for electric power system metering based on the digitized signals from the primary protection relay;
- a processor to execute the computer instruction stored on the non-transitory computer-readable storage medium;
- a display in communication with the processor to provide a human-readable visual indication of a plurality of values related to the electric power system metering;
- and
- a communications port to communicate information from the primary protection relay to an external device;
- wherein the electric power system panel meter is electrically isolated from the primary protection relay;
- and
- wherein the digital input comprises a unidirectional digital input to receive the plurality of digitized signals from the primary protection relay and to restrict transmission of a signal to the primary protection relay from the panel meter.
An electric power system panel meter, comprising:
- a digital input to receive a plurality of digitized signals from at least one primary protection relay;
- a non-transitory computer readable storage medium comprising computer instructions for electric power system metering based on the digitized signals from the primary protection relay;
- a processor to execute the computer instruction stored on the non-transitory computer readable storage medium;
- a display in communication with the processor to provide a human-readable visual indication of a plurality of values related to the electric power system metering;
- a communications port to communicate information from the primary protection relay to an external device;
- and
- an output to communicate with another electric power system panel meter in a cascaded configuration;
- wherein the electric power system panel meter is connectable to the primary protection relay while the primary protection relay is in continuous operation.
An electric power system panel meter, comprising:
- a digital input to receive a plurality of digitized signals from at least one primary protection relay;
- a non-transitory computer readable storage medium comprising computer instructions for electric power system metering based on the digitized signals from the primary protection relay;
- a processor to execute the computer instruction stored on the non-transitory computer readable storage medium;
- a display in communication with the processor to provide a human-readable visual indication of a plurality of values related to the electric power system metering;
- and
- a communications port to communicate information from the primary protection relay to an external device;
- wherein the electric power system panel meter is connectable to the primary protection relay while the primary protection relay is in continuous operation;
- and
- wherein the digital input comprises a fiberoptic communication medium.
Dependencies are inferred from the claim text.