Thermally-sensitive overcurrent protective relay including wire

Details Thermally-sensitive overcurrent protective relay including wire Thermally-sensitive overcurrent protective relay including wire

1987-10-16

1988-11-29

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337 45, H01H 7116, H01H 3770

Patent

active

047885181

ABSTRACT:
A thermally-sensitive overcurrent protective relay includes a housing case, a bimetal strip bendable in response to an operating current flowing through a control circuit of the overcurrent protective relay, and a movable contact biased by a spring to form a toggle mechanism operable in response to the bending action of the bimetal. A lever supporting bracket mechanically supports the movable contact at a fulcrum portion and electrically connects the movable contact to a terminal. The terminal is mounted in the housing case to conduct current to the control circuit through a contact spring for electrically connecting the lever supporting bracket. This lever supporting member includes a trip current adjusting mechanism adapted to be rotated at its end portion by turning an adjusting screw for adjustment of the operation current.

REFERENCES:
patent: 4635020 (1987-01-01), Sako
patent: 4652847 (1987-03-01), Sako

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