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US 4,855,671 AGranted
Electrical power line and substation monitoring apparatus
OwnerRoosevelt A. Fernandesinventor
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OwnerRoosevelt A. Fernandesinventor
Estimating the term…
Disclosed herein are individual sensor modules for mounting directly upon energized electrical power conductors and systems employing such modules, with principal emphasis upon the provision of both data transmitting and receiving means in each sensor module and at an associated ground station. The modules sense the instantaneous values of all parameters necessary to perform complete metering functions and, in one embodiment, are synchronized by a signal transmitted from the ground station and received by all modules so that the values are measured simultaneously on all conductors at a substation. The signals are transmitted by the modules in a time-synchronized manner and are in a condition for use directly by the ground station microprocessor. In another embodiment, data transmissions by a plurality of modules is synchronized to avoid data collisions by self-contained electronic apparatus within each module, requiring no synchronizing signal from the ground station. Also disclosed is a reliable battery back-up system, requiring essentially no removal and/or replacement of batteries for recharging, for providing power to the module electronics when there is little or no current flowing through the associated conductor.
A system for monitoring a plurality of parameters associated with each of a plurality of energized electrical power conductors, on power system circuits operable over a load range between predetermined minimum and maximum conductor currents in either direction, said system comprising:
Dependencies are inferred from the claim text.