Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1994-03-07
1995-10-24
Kincaid, Kristine L.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
H01H 3366
Patent
active
054612055
ABSTRACT:
An axial magnetic field vacuum interrupter includes electrode stems each having a member made of a highly conductive material, such as high conductivity copper. The conducting member has a plurality of angularly spaced, longitudinally extending slots that can be left open or filled with a material of lower conductivity. The member can by surrounded by an annulus of a lower conductivity material for added structural support. An axial core fabricated of a lower conductivity material can also be used. The slots and the lower conductivity materials reduce the production of eddy currents in the stems by the axial magnetic field, and thereby serve to reduce the phase delay between the field and the current and improve the quality of the field in the intercontact region.
REFERENCES:
patent: 3158722 (1964-11-01), Porter
patent: 3825789 (1974-07-01), Harris
patent: 3946179 (1974-09-01), Murano et al.
patent: 4516004 (1985-05-01), Bany et al.
patent: 4871888 (1988-06-01), Bestel
patent: 4935588 (1987-03-01), Hess et al.
The Vacuum Interrupter Contact, P. G. Slade, IEEE Trans. on Components, Hybrids, and Mfg. Tech., v. MHT-7, No. 1, pp. 25-32, Mar. 1984.
Eaton Corporation
Friedhofer Michael A.
Kincaid Kristine L.
Moran Martin J.
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