DETECTION DEVICE OF AN INTERNAL ARC IN A METALCLAD ELECTRICAL INSTALLATION

摘要

DETECTION DEVICE OF AN INTERNAL ARC IN A METALCLAD ELECTRICAL INSTALLATION An optic sensor comprises a transparent rod passing through the wall of a sealed enclosure of a gas-insulated electrical installation. The internally protruding end of the rod comprises frustum-shaped reflecting faces of a light ray parallel to the wall. This ray is reflected perpendicularly to the optic conductor which transmits the signal to an alarm device. Refer to figure 2.