Electricity: electrothermally or thermally actuated switches – With separate distinct diverse art-type switching device – Fusible element device with other
Patent
1980-03-21
1982-04-06
Broome, Harold
Electricity: electrothermally or thermally actuated switches
With separate distinct diverse art-type switching device
Fusible element device with other
337 70, 337144, H01H 8500
Patent
active
043238718
ABSTRACT:
A current-responsive, resettable, violence-free low fault range vacuum-type switch interrupter is disclosed which is especially designed for series connection with a high fault range current limiting fuse (CLF) to achieve an improved, full range circuit protecting device adapted for use in padmounted, oil filled switch gear apparatus or the like. The resettable switch includes a spring-loaded, over center toggle motive assembly along with a current-responsive, temperature sensitive, bimetallic U-shaped latching element; in the event of a fault, the element deforms and releases the motive assembly to quickly open the vacuum contacts without the violence or oil contamination associated with fuse links. Manual opening of the contacts, and resetting thereof after either manual or fault-induced contact opening, is achieved through appropriate manipulation of an external, trip-free operating handle. The switch further includes a weighted, shock-absorbing element for slowing the contacts just prior to engagement thereof during the switch closing sequence, and a novel, high-impact hammer arrangement for breaking any contact welds during the fault-induced operation of the switch. The resettable switch-CLF combination is synergistically coordinated such that the switch is operated when it experiences the characteristic let through current incident to the operation of the CLF, so as to enhance the overall protective result. In three-phase systems where each phase conductor is separately protected, the respective switches may be advantageously gang coupled to operate together, even if only one conductor experiences a fault.
REFERENCES:
patent: 3077525 (1963-02-01), Dyer
patent: 3147353 (1964-09-01), Leonard
patent: 3240901 (1966-03-01), Rodeseike et al.
patent: 3597713 (1971-08-01), McClain
patent: 3863187 (1975-01-01), Mahieu et al.
patent: 3920941 (1975-11-01), Hundstad
patent: 4032875 (1977-06-01), Belttary
patent: 4083028 (1978-04-01), Haubein et al.
patent: 4158119 (1979-06-01), Krakik
patent: 4168414 (1979-09-01), Kumbera et al.
Bruning Armin M.
Kamp Eugene L.
Popeck Charles A.
A. B. Chance Company
Broome Harold
LandOfFree
Circuit protecting apparatus including resettable vacuum fuse an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit protecting apparatus including resettable vacuum fuse an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit protecting apparatus including resettable vacuum fuse an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-595431