Instrument switch having integrated overcurrent protection

Details Instrument switch having integrated overcurrent protection Instrument switch having integrated overcurrent protection

H - Electricity

01

H

H01H 3/02 (2006.01) H01H 73/26 (2006.01) H01H 77/04 (2006.01) H01H 1/58 (2006.01) H01H 23/20 (2006.01) H01H 71/04 (2006.01) H01H 71/18 (2006.01)

Patent

CA 2119211

An electrical instrument switch includes a rocker switch for manual on-and-off switching and that is seated in an insulation housing. Depending on the pivot position, the rocker switch moves, with a working end that dips into the housing interior, a contact bridge between the closed position of its contact and the closed position of its contact. The contact bridge is electrically connected in series with a contact spring that can be triggered thermally and hence acts as an overcurrent protection. The contact spring can move between its contact position and its open position. The contact spring is mechanically prestressed in the direction of its open position. When overcurrent occurs, it is transferred out of its contact position into its open position by means of a thermal triggering element. A pivot of the rocker switch counter to the mechanical prestress, in the tipping direction of the contact spring, guides the contact spring from its open position back into its contact position.

nterrupteur d'instrument électrique comprenant un interrupteur à bascule pour une mise sous tension manuelle et qui est logé dans un boîtier d'isolation. Selon la position du pivot, l'interrupteur à bascule bouge, au moyen d'une extrémité qui s'abaisse à l'intérieur du boîtier, un pont de contact entre la position fermée et la position ouverte du contact. Le pont de contact est relié en série à un ressort de contact qui peut être déclenché thermiquement et agir ainsi comme une protection contre les surintensités. Le ressort de contact est précontraint de façon mécanique dans le sens de la position ouverte. S'il y a surintensité, le ressort est déplacé de la position de contact vers la position ouverte au moyen d'un déclencheur thermique. Un pivot de l'interrupteur à bascule opposé à la pression de contrainte mécanique, dans le sens de bascule du ressort de contact, guide ce dernier de la position ouverte à la position de contact.

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