Multiphase fault protection circuitry with variable functional l

Details Multiphase fault protection circuitry with variable functional l Multiphase fault protection circuitry with variable functional l

1979-06-01

1981-10-20

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361111, H02H 726, H02H 338

Patent

active

042964520

ABSTRACT:
In circuitry for generating tripping and blocking signals for the protection of electrical components in an electrical power supply network as a result of the occurrence of faults therein, respective tripping and blocking outputs for each phase of an electrical power supply network are generated such that double or triple pole tripping is prevented unless the presence of an actual second tripping signal is detected subsequent to the detection of a first tripping signal. The respective tripping signals and blocking signals for each phase of the electrical power supply network are generated in dependence on whether the fault lies ahead or behind the electrical component to be protected, respectively, in response to measurement of the voltage and current associated with transient waves generated by faults in each electrical power supply network phase. The presence of a tripping signal resulting from the occurrence of a single phase fault, and the presence of a second tripping signal resulting from the occurrence of a fault in another phase are detected. The functional level of detecting the second tripping signal is modified or adjusted upon detection of the first tripping signal.

REFERENCES:
patent: 3878460 (1975-04-01), Nimmersjo
patent: 3956671 (1976-05-01), Nimmersjo
patent: 4053816 (1977-10-01), Nimmersjo
patent: 4092691 (1978-05-01), Williams

Affiliated with

Also associated with

Rating

Multiphase fault protection circuitry with variable functional l does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiphase fault protection circuitry with variable functional l, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiphase fault protection circuitry with variable functional l will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1494279