Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1976-04-27
1978-05-16
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200150E, H01H 3368
Patent
active
040900525
ABSTRACT:
A tank-type oil circuit-breaker has a pair of arc-extinguishing grid-structures disposed interiorly within the oil tank, each of said arc-extinguishing grid-structures having a pair of outwardly-directed horizontally-laterally-spaced venting ports, with the angular direction, or divergence between the two horizontally-spaced venting ports of somewhat critical angular magnitude.
The construction is such that the two spaced venting ports on each arc-extinguishing grid structure collectively produce a resultant inwardly-directed jet force, which substantially counterbalances the outwardly-directed magnetic and mechanical forces resulting from the U-shaped line-current flow passing through the circuit-interrupter.
The angular separation, or angular divergence provided between the two horizontally-laterally-spaced venting ports of each arc-extinguishing grid-structure falls within the range of angular magnitude of 80.degree. to 160.degree.. A desirable divergence range is between 100.degree. and 140.degree., and preferably, the angular divergence is desirably 120 angular degrees.
REFERENCES:
patent: 2092656 (1937-09-01), Prince et al.
patent: 2467542 (1949-04-01), Taylor
patent: 2467760 (1949-04-01), Ludwig et al.
patent: 2749411 (1956-06-01), Kelle
patent: 3900946 (1975-08-01), Jawelak
Bohinc Richard J.
Racki Francis R.
Tragesser Charles W.
Vaill Ronald E.
Crout W. R.
Macon Robert S.
Westinghouse Electric Corp.
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