Method for retaining a movable contact in a circuit interrupter

Details Method for retaining a movable contact in a circuit interrupter Method for retaining a movable contact in a circuit interrupter

1997-06-02

2000-01-11

Donovan, Lincoln

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Magnetic blowout

218 51, 218 52, 218 59, 335 16, H01H 3318, H01H 944

Patent

active

060138890

ABSTRACT:
A method for retaining a movable contact in a circuit interrupter is applicable to interrupters including first and second contacts, at least one of the contacts being movable. A movable element supporting the movable contact is displaceable between a conducting position wherein the movable contact abuts a cooperating contact to complete a current carrying path through the device, and a non-conducting position wherein the movable contact is electrically separated from the cooperating contact. In accordance with the method, the movable contact is displaced by an interrupt initiation device, and a carrier or retainer is displaced by gas pressure resulting from arcs generated by movement of the contact. The carrier is guided in its displacement within the device housing from a normal operating position to a retaining position. The carrier includes an abutment element that physically contacts the movable element to prevent it from rebounding into contact with the cooperating contact.

REFERENCES:
patent: 4748305 (1988-05-01), Luginbuehl
patent: 5164693 (1992-11-01), Yokoyama et al.
patent: 5406440 (1995-04-01), Wieloch
patent: 5466903 (1995-11-01), Faber et al.
patent: 5579198 (1996-11-01), Wieloch et al.
patent: 5587861 (1996-12-01), Wieloch et al.
patent: 5635886 (1997-06-01), Pichard
patent: 5717370 (1998-02-01), Haas

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