Electromagnetic relay for low-voltage circuit breaker

Details Electromagnetic relay for low-voltage circuit breaker Electromagnetic relay for low-voltage circuit breaker

2005-08-16

2005-08-16

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

C335S035000, C335S176000

Reexamination Certificate

active

06930575

ABSTRACT:
An electromagnetic relay with adjustable tripping threshold for a low-voltage circuit breaker, comprising a magnetic circuit that has a fixed part,, which comprises a fixed element made of ferromagnetic material, a core, and at least one winding coil, and a moving part, which has a moving plate made of ferromagnetic material and arranged so as to face at least partially the fixed element with the coil interposed between the moving plate and the fixed element, the moving plate being functionally connected to means for adjusting the tripping threshold; its particularity consisting of the fact that the moving plate and/or the fixed element have a contoured body that allows, by acting on the adjustment means, to set the tripping threshold by simultaneously varying the gap between the moving plate and the fixed element and the magnetic coupling between the moving plate and the core.

REFERENCES:
patent: 3421123 (1969-01-01), Johnson et al.
patent: 4706054 (1987-11-01), Hampton et al.
patent: 295 15 254 (1995-12-01), None
patent: 0 326 449 (1989-08-01), None
patent: 0 369 899 (1990-05-01), None

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