Reduced-size thermal overload relay

Details Reduced-size thermal overload relay Reduced-size thermal overload relay

H - Electricity

01

H

306/174

H01H 61/02 (2006.01) H01H 83/22 (2006.01) H01H 71/16 (2006.01) H01H 71/74 (2006.01)

Patent

CA 1228103

Abstract of the Disclosure A reduced-size thermal overload relay having a housing that includes three narrow compartments in which are mounted three connector brackets supporting three flat bimetal members. Three narrow casette heaters are mounted at the upper part of the housing and held in by a snap-in hold-down device that engages pairs of hooks at the lower portions of the heaters. A pushbutton on the hold-down device extends through a hole in the front wall of the housing for manual depression to release the heaters for removal. Each bracket is H-shaped having legs for mount- ing it in a housing compartment and arms connected by a platform to which the upper terminal clip is clamped with a screw, the small angles of this platform and terminal clip automatically drawing the flat heater element into desired spacing with the bimetal member. The current flow down the arms prevents loss of heat through the terminal lead. A switch mounted at the side of the housing is tripped by a joint or differential operating mechanism mounted below the three compartments and actuated by the three deflecting bimetal members.

479356

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