PVSEC Firefighter Switch

The term firefighter switch indicates a device where the DC side of a photovoltaic system in proximity of the modules (or directly below the cable outlet) can be de-energised. It is intended to reduce or eliminate all difficulties or risks connected with fire fighting, high water or technical aid. De-energisation of the strings will occur immediately after shutdown of the supply voltage. An automatic restart ensures smooth and undisturbed operation of the photovoltaic system even in the event of voltage interruption unless there is a manual switching operation. The restart also allows reliable and safe operation of more than one, even hardly accessible firefighter switches.