SYSTEME POUR ISOLER UN RECEPTEUR D'AVEC UNE SOURCE DE TENSION CONTINUE

摘要

A protective circuit arrangement is provided for disconnecting a consumer requiring different potentials at different input terminals from a direct current power source having two output terminals supplying the different potentials in the event of a short-circuit between the potential terminals. The protective circuit includes a pair of mechanical circuit breakers located respectively in the connection lines extending between the power output and consumer input terminals which are each equipped with current overload contact release mechanisms and an electronic circuit responsive upon the occurrence of a short-circuit between the potential terminals serves to establish a current flow path from one of the connection lines to ground and short-circuit the input terminals of the consumer until one of the circuit breakers functions through its current overload release mechanism to open its contacts. The contacts of the two circuit breakers are mechanically coupled by an insulating coupling so that an opening movement of the contacts of one circuit breaker causes the contacts of the other circuit breaker to open also.