Abstract
A new concept of two-way automatic communication for distribution systems, henceforth abbreviated as TWACS™, is introduced in this paper. This paper restricts itself to the discussion of inbound signalling from the, remote transponder units at the customer's premises to, the receiver located at the substation. Inbound signalling uses current pulses, precisely generated and limited to only a small segment of a half cycle of the 60 Hz wave. The inbound signal is detected in the neutral or phase bus conductor at the substation. Bit coding, multi-channel assignment, detection algorithms and propagation characteristics are explained and discussed and the paper concludes with field results obtained at many different utilities.
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