Overcurrent protection device

Details Overcurrent protection device Overcurrent protection device

1993-03-16

1994-11-22

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337107, 361 23, 361 32, 361105, H01H 6102, H01H 7116

Patent

active

053672798

ABSTRACT:
An overcurrent protection device 10 has a fixed 26 and a movable 32 contact electrically connected to a pair of terminals 14, 16 and a snap acting bimetallic member 34 which is responsive to a thermally resistive element 28, connected in series with the contacts between the terminals to cause the contacts to move from an engaged position to a disengaged position. The device further includes a current bypass path 24 adapted to be connected in parallel with the thermally resistive element 28 and a second thermally responsive bimetal member 24 b to cause the electrical connection. Additionally, a heater block 18 can be provided between the terminals 14, 16 which has a resistance significantly higher than that of the thermal resistive element 28.

REFERENCES:
patent: 4295114 (1981-10-01), Pohl
patent: 4319126 (1982-03-01), Lujie
patent: 4472705 (1984-09-01), Carlson
patent: 4580123 (1986-04-01), Roller et al.
patent: 4876523 (1989-10-01), Kushida et al.
patent: 5039843 (1991-08-01), Muller

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