Electricity: electrical systems and devices – Safety and protection of systems and devices – Automatic reclosing
Patent
1984-05-24
1987-02-17
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Automatic reclosing
361 96, H02H 307
Patent
active
046444386
ABSTRACT:
An electric current-limiting circuit breaker comprises a pair of separable contacts and a selective solid state trip unit including an actuator cooperating with a latch mechanism for actuating the contacts to a positive open position upon occurrence of an overcurrent condition. The movable contact may also be moved by electrodynamic repulsion towards the open position when the fault current exceeds a predetermined threshold to effect current limiting. A tripping control device has an electronic counter which counts successive opening and closing cycles of the contacts so as to trip mechanism after a given number of cycles. The trip unit further comprises a first time delay tripping circuit, and a second instantaneous tripping circuit which cooperates with the cycle counter so as to ensure either instantaneous tripping or tripping by counting up to a number of cycles preselected on a setting selector.
REFERENCES:
patent: 3317791 (1967-05-01), Price et al.
patent: 3328696 (1967-06-01), Schunemann
patent: 3375341 (1968-03-01), Richards
patent: 3558985 (1971-01-01), Krolski et al.
patent: 3634730 (1970-05-01), Wilson
patent: 3878436 (1975-04-01), Bogel
patent: 4084204 (1978-04-01), Jacobus, Jr.
patent: 4219790 (1980-08-01), Batteux et al.
patent: 4316230 (1982-02-01), Hansen et al.
patent: 4454556 (1984-06-01), DePuy
Pettinga et al., A Polyphase 500 KA Current Measuring System with Rogowski Coils, IEE Proc. V. 130, Pt B, No. 5, Sep. 1983, p. 360.
Carlson et al., Voltage and Current Sensors for a 1200 KV Gas Insulated Bus, 7th IEEE/Res Trans. and Distr. Conf., Apr., 1979.
"Electronics Revives the Rogowski Coil CT", Electrical Review, V. 216, No. 4, Feb. 1, 1985, p. 22.
Fraisse Didier
Puccinelli Robert
Merlin Gerin
Pellinen A. D.
Wysocki A. Jonathan
LandOfFree
Current-limiting circuit breaker having a selective solid state does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current-limiting circuit breaker having a selective solid state , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current-limiting circuit breaker having a selective solid state will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1940144