Fuse-isolator - actuator

Electricity: electrothermally or thermally actuated switches – With separate distinct diverse art-type switching device – Fusible element device with other

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337 2, 337150, H01H 8500, H01H 7120

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active

049490605

ABSTRACT:
The invention provides an isolating fusible link, in series with a transformer primary circuit breaker device, for producing an isolating gap after an occurrence of a primary fault condition. More particularly, the invention provides an apparatus comprising a power transformer primary circuit breaker device adapted to be electrically connected in a circuit and including a first contact, and a second contact movable out of engagement with the first contact to open the circuit and movable into engagement with the first contact to close the circuit; and a fuse device including a fusible link connected in electrical series with the breaker device, and adapted to fuse upon an overcurrent condition in the circuit, and structure for moving and maintaining the second current out of engagement with the first contact in response to fusing of the fusible link.

REFERENCES:
patent: 1130485 (1915-03-01), Davis
patent: 1740307 (1929-12-01), Jones
patent: 1887489 (1932-11-01), Hoffer
patent: 3043934 (1962-07-01), Bodenschatz
patent: 3166894 (1965-01-01), Zmuda et al.
patent: 3544942 (1970-12-01), Johnson et al.
patent: 3985988 (1976-10-01), Korner et al.
patent: 4380001 (1983-04-01), Kassmatsu
patent: 4435690 (1984-03-01), Link et al.
patent: 4550298 (1985-10-01), Mikulecky
patent: 4611189 (1986-09-01), Mikulecky

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