Sectionalizer for spur lines

Details Sectionalizer for spur lines Sectionalizer for spur lines

1986-01-08

1988-07-19

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 67, 361 87, 361 93, 361114, 361 42, H02H 305, H02H 308

Patent

active

047589191

ABSTRACT:
Fault currents in the phases of a three-phase supply are detected by transformers 28 in respective phase links 14 and are counted by associated circuits 24 when any one of the circuits 24 reaches a predetermined count level, or when there is a fault condition, a low VA trip coil 42 is energized so as to release latches which hold the phase links 14 in their operative positions and thereby cause all three links 14 to drop out together.

REFERENCES:
patent: 2574801 (1951-11-01), Thompson et al.
patent: 4038695 (1977-07-01), DePuy
patent: 4181922 (1980-01-01), Matsko
patent: 4259706 (1981-03-01), Zocholl
patent: 4316230 (1982-02-01), Hansen
patent: 4423459 (1983-12-01), Stich
patent: 4553188 (1985-11-01), Aubrey et al.
patent: 4642724 (1987-02-01), Ruta

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