Power supply protection system applied to optical subscriber net

Details Power supply protection system applied to optical subscriber net Power supply protection system applied to optical subscriber net

1993-04-20

1994-09-13

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 84, 361 63, 361 62, H02H 330

Patent

active

053474171

ABSTRACT:
A system for protecting a remote power supply for supplying power to an optical subscriber network, via a pair of power supply lines, from a remote power supply apparatus, being provided with power supply branch apparatuses inserted into the power supply lines in correspondence with each power receiving circuit respectively mounted in subscriber transmission nodes. Each of the power supply branch apparatuses comprises relay contacts inserted into its own power supply branch lines connected between the power supply lines and its own power receiving circuit, and a relay energized by an overcurrent detector or first and second communication units to change over the relay contacts. The relay contacts are opened and closed subscriber by subscriber sequentially to detect a faulty portion, and thereafter, the power is fed again selectively to the subscribers which have not experienced the fault.

REFERENCES:
patent: 4538196 (1985-08-01), Sun et al.
patent: 4996646 (1991-02-01), Farrington

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