Process and apparatus for the short-circuit protection of A.C. c

Details Process and apparatus for the short-circuit protection of A.C. c Process and apparatus for the short-circuit protection of A.C. c

1982-09-03

1984-01-17

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

361 80, 361 85, 361111, H02H 318

Patent

active

044266715

ABSTRACT:
A process and device useful in the protection of AC current circuits, particularly of parallel lines supplied at both ends, provided with protection relays at both ends of the line against susceptibility to false triggering as a result of transient signal components and signals disturbances, and particularly useful in providing stepped protection upon initial disconnection at one side of a line after occurrence of a short circuit against the change of energy direction with reversal of the fault direction detected in the protection relay of the sound line on crossing the triggering range of the appropriate characteristics curve, which also leads to false triggerings in multi-system protection relays because of transient switching inaccuracies. On the transition of a protection relay from the blocked to the triggering condition, the process and device maintains the blocking condition for a limited time interval of at least a half period for the phase angle measuring systems with coincidence and anticoincidence signals (k and ak respectively) by means of an interlocking circuit connected to an anticoincidence channel of one measuring system and released for triggering after a predetermined time.

REFERENCES:
patent: 2147842 (1939-02-01), Hunt
patent: 4222085 (1980-09-01), De Mesmaeker
patent: 4237511 (1980-12-01), De Mesmaeker

Affiliated with

Also associated with

Rating

Process and apparatus for the short-circuit protection of A.C. c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for the short-circuit protection of A.C. c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for the short-circuit protection of A.C. c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-703120