PROTECTION RELAY SYSTEM AGAINST SINGLE-PHASE FAULTS FOR MEDIUM-VOLTAGE DISTRIBUTION NETWORKS
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United States of America Patent
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Issued Date -
Apr 10, 2014
app pub date -
Oct 4, 2013
filing date -
Oct 5, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The electrical power distribution network comprises a medium-voltage feeder having an upstream end intended to be connected to a power source. The feeder includes at least first and second consecutive protection relays positioned along the feeder and defining the ends of a first element to be monitored. The first protection relay includes a search module configured to trip a breaker to interrupt the electrical power distribution:
- after a first time delay when the search module detects a single-phase permanent fault in a monitoring area of the first element; andafter a second time delay longer than the first time delay when the search module detects a single-phase permanent fault in an additional monitoring area located downstream of the area.
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