Mains phase determination
AssigneeRemote Metering Systems Ltd.
InventorsRobert J. Allison, Stephen D. Farnsworth, Edward J. D. Fisher, David R. Scholefield
Life of this patent
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Abstract
An apparatus and method for remotely determining the phase of a single phase load on a multi-phase power distribution system, including powerline communications and repeaters. The phase determination being based upon comparison of message receipt times.
Claims12
A remote metering system comprising a multi-phase mains supply system (10) having a control unit (CS) and a plurality of single-phase consumer meter units (M1-M3) with messages passing between the meter units and the control unit, characterized by phase determining means comprising synchronizing means (CTR1, FIGS. 3 and 4) in the units for synchronizing their message processing to specific phases of the mains supply, and means (17) for determining the relative phases of the control unit and a meter unit from the timing (SYN-CT) of a message passing between them relative to the phases to which those units are synchronized.
Dependencies are inferred from the claim text.