Thermal release

H - Electricity – 01 – H

Patent

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H01H 71/16 (2006.01)

Patent

CA 2582251

The invention relates to a thermal tripping device which is heated indirectly by means of a heating winding (10) and which comprises a release strip made of thermostatic bimetal (30), a form memory alloy or similar. An insulating intermediate layer (31) is arranged between the heating winding and the release strip and one of the ends of the heating winding is connected to a supply conductor. The heating winding is embodied in an identically meandering manner for all current intensities and is folded about the insulating intermediate layer. In order to modify the resistance of the heating winding for other current intensities, the discharge (34) is connected to a wiring point between the ends of the heating windings.

L'invention concerne un déclencheur thermique de surintensité chauffé indirectement au moyen d'un enroulement chauffant (10), ce déclencheur comprenant une lame de déclenchement réalisée dans un matériau thermique bimétallique (30), un alliage à mémoire de forme ou similaire. Une couche intermédiaire isolante (31) est placée entre l'enroulement chauffant et la lame de déclenchement et une des extrémités de l'enroulement chauffant est reliée à un conducteur d'alimentation. L'enroulement chauffant se présente en forme de méandre de façon identique pour toutes les intensités de courant et il est plié autour de la couche intermédiaire isolante. Pour modifier la résistance de l'enroulement chauffant pour d'autres intensités de courant, la dérivation (34) est raccordée à un point de prise entre les extrémités de l'enroulement chauffant.

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