Technique for fault isolation and transient load isolation...

Details Technique for fault isolation and transient load isolation... Technique for fault isolation and transient load isolation...

2006-01-03

2006-01-03

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

C361S111000

Reexamination Certificate

active

06982860

ABSTRACT:
A central office transceiver-installed current limiter and regulator provides fault isolation and transient load isolation in a wireline communication network, having multiple transceivers connected by respective span-powered wirelines to a common power source at the central office. Using a current-sense resistor and controlled switch in series with the wireline, the current-limiter and regulator processes input electrical power from the power source prior to coupling that power to a remote transceiver. To prevent overheating and substantial power dissipation in the current-limiting circuitry in the event of a prolonged fault condition, the controlled switch is alternately turned on and off.

REFERENCES:
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patent: 4254305 (1981-03-01), Treiber
patent: 4343971 (1982-08-01), Beene
patent: 5237606 (1993-08-01), Ziermann
patent: 6396673 (2002-05-01), Yancey et al.
patent: 6496345 (2002-12-01), Smith
patent: 6665404 (2003-12-01), Cohen
patent: 6690792 (2004-02-01), Robinson et al.

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