Electromagnetic trip for an electrical apparatus for protection

Details Electromagnetic trip for an electrical apparatus for protection Electromagnetic trip for an electrical apparatus for protection

1997-09-19

1999-04-13

Gellner, Michael L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

335255, 335251, 335174, H01H 900

Patent

active

058942572

ABSTRACT:
An electromagnetic trip for an electrical switch apparatus for protecting against short circuits, including a magnetic yoke (20), a tubular non-magnetic coil form (40) with axis X-X', open at both ends (42, 43), a control coil (50) wound around the form (40), a fixed core (60) and a movable core (70) which are housed in the respective ends (42, 43) of the form (40), the movable core (70) having an upper end (72) projecting outside the form (40), characterized in that the form (40), the coil (50), the fixed core (60) and the movable core (70) constitute a pre-assembled electromagnetic sub-assembly (10) intended to be introduced into the magnetic yoke (20).

REFERENCES:
patent: 3509505 (1970-04-01), Zagrzjewski
patent: 4677409 (1987-06-01), Kozuka et al.
patent: 4698609 (1987-10-01), Goehle et al.

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