Audio bandwidth interface apparatus for pilot wire relays

Details Audio bandwidth interface apparatus for pilot wire relays Audio bandwidth interface apparatus for pilot wire relays

1993-03-03

1995-06-20

Hoff, Marc S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 66, 361 68, H02H 300

Patent

active

054265541

ABSTRACT:
In a pilot wire relay electrical power distribution protection system, an audio band interface apparatus acquires a Hz pilot wire signal from the pilot wire relay and produces signals having frequencies within the frequency band pass of fibre optic communication channels. The apparatus enables pilot relays, which previously communicated over hard wire connections such as dedicated telephone lines, to communicate through a fibre optic communication channel without the necessity for extensive modifications to the pilot wire relay.

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