Varistor fuse element

Details Varistor fuse element Varistor fuse element

1984-05-21

1987-03-24

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

337 15, 361 56, H02H 320, H01H 8310, H01H 8504

Patent

active

046529640

ABSTRACT:
Varistor fuse element for protecting an electric circuit against overvoltages, including a thermal fuse, a varistor combined with the thermal fuse for for tripping the thermal fuse with joulean or ohmic heat losses of the varistor, first and second conductors for supplying current to the fuse element, and first and second switch contacts each being connected to a respective one of the conductors for bridging the varistor, the contacts being closed when the thermal fuse is tripped by the varistor.

REFERENCES:
patent: 3213345 (1965-10-01), Loftus
patent: 3345482 (1967-10-01), Lou
patent: 4096464 (1978-06-01), Dennis et al.
patent: 4249224 (1981-02-01), Baumbach
patent: 4288833 (1981-09-01), Howell

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