Low-voltage circuit-breaker and corresponding...

Details Low-voltage circuit-breaker and corresponding... Low-voltage circuit-breaker and corresponding...

2006-05-16

2006-05-16

Lee, K (Department: 2832)

Electricity: circuit makers and breakers

Contact moved by sudden release of stored energy,

C200S401000, C218S154000, C335S167000, C335S172000

Reexamination Certificate

active

07045733

ABSTRACT:
Described herein is a low-voltage circuit-breaker, which comprises at least one mobile contact and a corresponding fixed contact, and a positive-opening-operation device. The positive-opening-operation device in turn comprises: a moving element associated to the mobile contact; a first kinematic chain, operatively associated to said mobile contact and to an actuating device; and a second kinematic chain, associated to said moving element and to said first kinematic chain. A first lever is associated to the first kinematic chain and a second lever is associated to the second kinematic chain, said first and second levers interacting with one another during the opening operation and being equipped with blocking devices in the event of welding of the contacts together.

REFERENCES:
patent: 3921109 (1975-11-01), Hodgson
patent: 5250918 (1993-10-01), Edds et al.
patent: 5260533 (1993-11-01), Livesey et al.
patent: 6316742 (2001-11-01), Rostron et al.

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