Method of making a stable high voltage DC varistor

Details Method of making a stable high voltage DC varistor Method of making a stable high voltage DC varistor

1981-06-15

1983-10-18

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29621, 427101, H01C 1702

Patent

active

044097280

ABSTRACT:
A high voltage varistor for DC operation is manufactured by applying a glass collar to the perimeter of a sintered zinc oxide disc and heat treated between about 750.degree. C. and 400.degree. C. for several cycles in air. After heat treating, an organic resin or ceramic coating is applied to the glass collar to further insulate the varistor for high voltage application.

REFERENCES:
patent: 3959543 (1976-05-01), Ellis
patent: 4046847 (1977-09-01), Kresge
patent: 4148135 (1979-04-01), Sakshaug et al.

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