Method and device for protecting starters from fault currents

Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

361 31, 361 99, 361 93, 318789, H02H 902

Patent

active

049910507

ABSTRACT:
An apparatus for protecting the fault current intolerant elements of a motor starter circuit or the like is comprised of a protective shunt which bypasses the fault current intolerant elements in response to the detection of high fault currents. The protective shunt is formed of a "U" shaped conductor which flexes in response to the magnetic field created by the flow of the high fault currents through the "U" shaped conductor. Electrical contacts place on one leg of the "U" shaped conductor and on a stationary conductor form a shunting switch which conducts high fault currents around the starter circuitry. In a second embodiment, the stationary conductor is replaced with a flexible conductor which carries an armature. The magnetic armature is attracted by a focussed magnetic field from a magnetic yoke positioned around one leg of the "U" shaped conductor.

REFERENCES:
patent: 1762604 (1930-06-01), Ainsworth
patent: 1958159 (1934-05-01), Bresson
patent: 2821594 (1958-01-01), Latour
patent: 3092699 (1963-06-01), Latour
patent: 3238326 (1966-03-01), Frey
patent: 3558910 (1971-01-01), Dale
patent: 3783305 (1974-01-01), Lefferts
patent: 3868549 (1975-02-01), Schaefer et al.
patent: 3887888 (1975-06-01), Bayles et al.
patent: 4001738 (1977-01-01), Terracol et al.
patent: 4445079 (1979-04-01), DeFilippis et al.
patent: 4467301 (1984-08-01), Goodrich
patent: 4511774 (1985-04-01), Forsell
patent: 4513267 (1985-04-01), McClellan et al.
patent: 4630014 (1986-12-01), McClellan et al.
patent: 4633207 (1986-12-01), McClellan et al.
patent: 4745511 (1988-05-01), Kugelman et al.
patent: 4760483 (1989-07-01), Kugelman et al.
patent: 4788415 (1988-11-01), Whipple, Jr.
Asco Controls Bulletin, Automatic Switch Co., "Withstand Circuit Ratings for Asco Transfer Switches", p. 3, 1982.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and device for protecting starters from fault currents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for protecting starters from fault currents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for protecting starters from fault currents will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-15899

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.