Fault sensor suitable for use in heterogenous power distribution

Details Fault sensor suitable for use in heterogenous power distribution Fault sensor suitable for use in heterogenous power distribution

1997-09-23

1999-12-14

Do, Diep N.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

324509, 361 65, 36452821, G01R 3108

Patent

active

060022604

ABSTRACT:
A fault sensor suitable for use in a heterogenous power distribution system executes a stored program and causes sufficient information to be collected to distinguish a source of fault current as being from a public utility portion of the power distribution network or from a distributed generator. Short circuit current and magnetizing current are reliably distinguished based on differences in VI "signatures." In addition, the fault sensor periodically senses a condition of a battery of the fault sensor. When the condition of the battery indicates the battery power is low, the fault sensor sends a digital data signal including a low battery indication to a remote location. Subsequent to occurrence of a sustained power outage, the sensor detects that power has been restored and sends to a remote location a digital data signal including an indication that power has been restored. The sensor periodically measures peak line voltage and peak line current and reports peak values to the remote location.

REFERENCES:
patent: 5517423 (1996-05-01), Pomatto
patent: 5547514 (1996-08-01), Ward et al.
patent: 5550476 (1996-08-01), Lau et al.
patent: 5565783 (1996-10-01), Lau et al.
patent: 5656931 (1997-08-01), Lau et al.
patent: 5839093 (1998-11-01), Novosel et al.

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