Stable high voltage DC varistor

Details Stable high voltage DC varistor Stable high voltage DC varistor

1980-10-27

1982-02-23

Albritton, C. L.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

29621, H01C 710

Patent

active

043171010

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: 4148135 (1979-04-01), Sakshaug et al.
patent: 4218721 (1980-08-01), Stetson

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