Differential thermal tripping device with bimetallic strips

Details Differential thermal tripping device with bimetallic strips Differential thermal tripping device with bimetallic strips

1997-03-18

1998-10-20

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 62, 337 82, H01H 6100

Patent

active

058252738

ABSTRACT:
Differential thermal tripping device with bimetallic strips for electrical protection appliance such as a circuit breaker. The circuit breaker includes a tripping assembly with two contact strips 30, 40 free to move along the X direction, and for each bimetallic strip, a single adjustment part 15 fixed to a free inclined edge 19 of the bimetallic strip head 13, adjustable along the X direction, in the position obtained after heating of the bimetallic strips for calibration. The assembly 30, 40 may consist of a frame supporting adjustment parts until they are fixed and provided with separable areas 36, 46 to generate two contact strips following cutting.

REFERENCES:
patent: 4528539 (1985-07-01), Forsell et al.
patent: 4691184 (1987-09-01), Wulff
patent: 4859979 (1989-08-01), Jacqet

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