Method and apparatus for triggering a fuse

Details Method and apparatus for triggering a fuse Method and apparatus for triggering a fuse

1999-08-09

2000-10-31

Picard, Leo P.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361102, 361 87, 361 93, 361104, 361160, 337 5, 337157, 337 6, 337 143, H02H 308, H02H 300, H01H 7112, H01H 8500

Patent

active

061412023

ABSTRACT:
The response time of a melting fuse is controlled or influenced by temporarily boosting a threshold level from a first constant value (I.sub.1) to a second dynamic value (I.sub.2) which is then caused to decay in a controlled manner during a fixed time between (t.sub.1) and (t.sub.2) and in accordance with a selectable decay function. If a current (m) flowing through the fuse exceeds the decaying threshold value a fuse blowing current is generated and supplied to the fuse, whereby the fuse blows sooner than it would have, if the excess current had prevailed for a long enough time between (t.sub.1) and (t.sub.X). On the other hand, the fuse does not blow in response to short duration transient excess currents that occur, for example at starting an engine. The engine start impulse which may be used to temporarily raise the threshold value from (I.sub.1) to (I.sub.2) and then cause said controlled decay.

REFERENCES:
patent: 3202836 (1965-08-01), Nyberg
patent: 3317791 (1967-05-01), Price et al.
patent: 3555354 (1971-01-01), Kotos
patent: 3614533 (1971-10-01), Douglas et al.
patent: 3684923 (1972-08-01), Keeler, II
patent: 3689801 (1972-09-01), Engel et al.
patent: 3713005 (1973-01-01), Engel
patent: 3728583 (1973-04-01), Wickson
patent: 3868552 (1975-02-01), Wickson
patent: 3958206 (1976-05-01), Klint
patent: 4000446 (1976-12-01), Vandevier et al.
patent: 4004201 (1977-01-01), DePuy
patent: 4149210 (1979-04-01), Wilson
patent: 4203142 (1980-05-01), Lee
patent: 4218718 (1980-08-01), Sun
patent: 4258403 (1981-03-01), Shimp
patent: 4345292 (1982-08-01), Jaeschke et al.
patent: 4442472 (1984-04-01), Pang et al.
patent: 4538133 (1985-08-01), Pflanz
patent: 4573032 (1986-02-01), Hickey
patent: 4661807 (1987-04-01), Panaro
patent: 4752852 (1988-06-01), Ahl et al.
patent: 4920446 (1990-04-01), Pflanz
patent: 4920448 (1990-04-01), Bonhomme
patent: 5038246 (1991-08-01), Durivage, III
patent: 5093657 (1992-03-01), Bishop et al.
patent: 5195012 (1993-03-01), Tripodi
patent: 5307230 (1994-04-01), MacKenzie
patent: 5311392 (1994-05-01), Kinney et al.
patent: 5617078 (1997-04-01), Durif et al.
patent: 5740027 (1998-04-01), Akers et al.
patent: 5841618 (1998-11-01), Dilkes et al.
patent: 5875087 (1999-02-01), Spencer et al.
"Commutating Current-Limiters-an Effective Alternative for High Current Protection" by John S. Schaffer, 1996.
Schaffer, "Neta World", pp. 7-18, 1997.
Electronic Fuse Provides Improved Protection and Coordination on In-Plant Distribution, 1996.
Systems, by Carey J. Cook, "Neta World", pp. 43-48, 1997.
Handbook entitled "Hilfsbuch der Elektrotechnik", published by AEG Telefunken vol. 2, pp. 293 to 391.

Affiliated with

Also associated with

Rating

Method and apparatus for triggering a fuse 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 apparatus for triggering a fuse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for triggering a fuse will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2060232