METHOD OF PROTECTING ELECTRICAL EQUIPMENT, IN PARTICULAR DIRECT CURRENT EQUIPMENT, E.G. PHOTO-VOLTAIC EQUIPMENT, AND A DETECTION UNIT FOR SAID EQUIPMENT

摘要

In a method of protecting electrical equipment, in particular direct current equipment, e.g. photo-voltaic equipment having at least one solar module, electromagnetic radiation emitted by an arc accompanying a short circuit and/or a current path interruption is detected. An alarm is then triggered and/or the circuit section experiencing the short-circuit or current path interruption is switched off. Detection is carried out by a detection unit (15) which is disposed in the equipment and which comprises at least one electrical oscillating circuit (25, 26) which is activated by the electromagnetic radiation emitted by an in particular pulsating direct current arc. The detection unit (15) is preferably connected to leads which are in turn connected voltaically to the location of the arc. The detection unit (15) can also be used for monitoring and/or protecting alternating current equipment, in particular low-voltage equipment.