Interlock assembly for a manually operated multi-phase fusible s

Details Interlock assembly for a manually operated multi-phase fusible s Interlock assembly for a manually operated multi-phase fusible s

1997-04-25

1998-11-10

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337 6, 337174, 337241, 337210, H01H 7120, H01H 7110, H01H 7112

Patent

active

058350020

ABSTRACT:
An interlock assembly is provided for use in a manually operated multi-phase fusible switch having a fuse in series with a blade for each phase and a handle for simultaneously controlling the position of the blades. Each fuse is CONDUCTIVE when it allows current to flow therethrough and is BLOWN when it does not allow current to flow therethrough. The handle is coupled to a drive rod and is movable between an OPEN position and a CLOSED position wherein the blades conduct current therethrough when the handle is in the CLOSED position and do not conduct current therethrough when the handle is in the OPEN position. The interlock assembly includes an interlock mechanism for preventing the handle from being moved from the OPEN position to the CLOSED position when one or more of the fuses are BLOWN or missing, thereby preventing the blade for each phase from moving into the CLOSED position when one or more of the fuses are BLOWN or missing.

REFERENCES:
patent: 3777084 (1973-12-01), Rys
patent: 3842380 (1974-10-01), Granson et al.
patent: 3909762 (1975-09-01), Wilks et al.
patent: 5587570 (1996-12-01), Kelaita, Jr. et al.
patent: 5633619 (1997-05-01), Oetjen et al.

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