Distribution power line communication system including a messeng

Details Distribution power line communication system including a messeng Distribution power line communication system including a messeng

1975-10-16

1977-03-15

Caldwell, John W.

Communications: electrical

Systems

Selsyn type

179 25R, 340310R, H04M 1104

Patent

active

040127338

ABSTRACT:
A distribution power line communication system wherein communication signals are transferred between a communication terminal at a substation and communication terminals at customer locations. The communication signals are transferred between the terminals by using a two-conductor line, with one of the conductors effectively grounded and with the other of the conductors effectively isolated from ground. The conductor which is isolated from ground provides a conduction path which travels along the primary distribution line to a distribution transformer location. At this location, the conduction path is transferred to a messenger wire which supports other transmission lines between various distribution transformer locations. The messenger wire is suitably isolated from ground and the conduction path is transferred to separate secondary distribution lines adjacent to the messenger wire. The final portion of the ground-isolated conduction path which directs signals to the communication terminals at the customer locations is provided by the secondary distribution lines and by the service lines extending to the customer locations.

REFERENCES:
patent: 1062083 (1913-05-01), Creighton
patent: 1518683 (1924-12-01), Baker
patent: 1657248 (1928-01-01), Dubilier
patent: 1859066 (1932-05-01), Baker
patent: 3942168 (1976-03-01), Whyte

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