Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1998-04-02
2000-02-01
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335 35, 335 23, 335 43, H01H 900
Patent
active
060208023
ABSTRACT:
A circuit breaker for interrupting the flow of electric current in a line includes a switch connected in series with the line, the switch having an open position and a closed position. At least one positive temperature coefficient resistivity element (PTC element) is connected in series with the line. A first magnetic coil is positioned around a yoke, for example, an iron core, and connected in parallel with the PTC element and a second magnetic coil is positioned around the yoke and connected in series with the line and the switch. A voltage limiting device, such as a metal oxide varistor, is connected in parallel with the at least one PTC element. An armature is pivotally mounted in relation to the yoke wherein the yoke and the armature form a magnetic circuit with the first magnetic coil and the second magnetic coil. A trip lever is connected to the armature and the switch, the trip lever effecting movement of the switch from a closed position to an open position wherein the flow of electric current in the line is interrupted. When the first magnetic coil or the second magnetic coil reaches a predetermined current value, the armature is pulled to trip by the magnetic circuit wherein the trip lever is pulled to a tripped position to effect the movement of the switch to an open position wherein the flow of electric current in the line is interrupted.
REFERENCES:
patent: 3401363 (1968-09-01), Vyskocil et al.
patent: 3760310 (1973-09-01), Carson
patent: 3973233 (1976-08-01), Miyamoto et al.
patent: 4070641 (1978-01-01), Khalid
patent: 4288769 (1981-09-01), Howell
patent: 4562323 (1985-12-01), Belbel et al.
patent: 4596911 (1986-06-01), Guery et al.
patent: 4677266 (1987-06-01), Belbel et al.
patent: 4801772 (1989-01-01), Bratkowski et al.
patent: 5119054 (1992-06-01), Grunert et al.
patent: 5195013 (1993-03-01), Jacobs et al.
patent: 5214405 (1993-05-01), Glas
patent: 5254816 (1993-10-01), Shutoh et al.
patent: 5303115 (1994-04-01), Nayar et al.
patent: 5345126 (1994-09-01), Bunch
patent: 5378938 (1995-01-01), Chandler et al.
patent: 5382938 (1995-01-01), Hansson et al.
patent: 5414403 (1995-05-01), Grueter et al.
patent: 5424504 (1995-06-01), Tanaka et al.
patent: 5428195 (1995-06-01), Arnold
patent: 5428493 (1995-06-01), Takeuchi et al.
patent: 5436609 (1995-07-01), Bauer
patent: 5473495 (1995-12-01), Bauer
patent: 5495083 (1996-02-01), Aymami-Pala et al.
patent: 5530613 (1996-06-01), Bauer et al.
patent: 5539370 (1996-07-01), Arnold
patent: 5629658 (1997-05-01), Chen
patent: 5667711 (1997-09-01), Mody et al.
Chen William W.
Larson Brett E.
Donovan Lincoln
Golden Larry I.
Irfan Kareem M.
Nguyen Tuyen T.
Square D Company
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