Document Type and Number:
Japanese Patent JPS5177866
Kind Code:
A
Abstract:
A vacuum-type circuit interrupter rated to interrupt currents of 30,000 amperes r.m.s. and highercomprises a pair of separable contacts having arcing portions between which arcs are formed upon disengagement of said contacts. These arcing portions are of a material consisting essentially of beryllium formed from a vacuum-cast ingot that has been subjected to hot working by extrusion to produce a microstructure characterized by grains much smaller on the average than the grains of the as-cast ingot.
Inventors:
DONARUDO RII KURUTSU
KAARU USHIMIA HOPADEITSUKU
JOSEFU KAARU SOFUIANETSUKU
JOSEFU ROORENSU TARENTO
KAARU USHIMIA HOPADEITSUKU
JOSEFU KAARU SOFUIANETSUKU
JOSEFU ROORENSU TARENTO
Application Number:
JP14243075A
Publication Date:
July 06, 1976
Filing Date:
December 02, 1975
Export Citation:
Assignee:
GEN ELECTRIC
International Classes:
H01H1/02; H01H1/06; H01H33/66; (IPC1-7): H01H1/02; H01H1/06; H01H33/66