Protection circuit against flashing-light corruption

摘要

In order to prevent flashing-light corruptions resulting from disturbances which are coupled onto supply lines (B) to the loads (L3 to L5) conductively, inductively or capacitively, a switch (GBI) which operates in the opposite sense to the actual flash transmitter (BI) short-circuits the loads in the flash pauses. If a fuse element (KS) which is provided to protect this switch triggers, the supply circuit current to the loads is permanently disconnected. The disturbance which has occurred can be identified on an alarm module (M) which is connected in parallel with the fuse element. The protection circuit is provided especially for the flashing-light supply in signalling devices. <IMAGE>