Varistor protection cover and varistor device

Details Varistor protection cover and varistor device Varistor protection cover and varistor device

2006-12-13

2010-10-05

Lee, Kyung (Department: 2833)

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

C337S183000, C337S206000, C361S121000

Reexamination Certificate

active

07808364

ABSTRACT:
A protection cover used for avoiding the influence brought about by the temperature effect of a varistor is proposed. The protection cover is made of ceramic or refractory material, and is used to bear high temperature generated when a metal oxide varistor breaks down to catch fire and to further cover the fire therein, thereby preventing the fire from burning out application components around the metal oxide varistor. Moreover, accommodation portions and grooves for receiving temperature breakers are disposed on the protection cover to provide a better contact surface between the protection cover and the temperature breakers so that the temperature breakers can more accurately detect the temperature on the protection cover, hence reducing the occurrence of the situation of erroneous actions.

REFERENCES:
patent: 5198791 (1993-03-01), Shibayama et al.
patent: 5408379 (1995-04-01), Oguchi et al.
patent: 5502612 (1996-03-01), Osterhout et al.
patent: 5760336 (1998-06-01), Wang
patent: 5781394 (1998-07-01), Lorenz et al.
patent: 6094128 (2000-07-01), Bennett et al.

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