The MULTIBLOC 00.RST9 product range includes NH fuse switch-disconnectors for NH fuse-links according to IEC / EN 60 269-2, VDE 0636-2, size 00 to 160A. The products are available in 3-pole versions and are suitable for 40mm and 60mm busbar systems. MULTIBLOC NH fuse switch-disconnectors of different sizes can be brought to one level with suitable covers, which enables a common, flat central cover. The system is a modular system in which the various products can be optimally combined. MULTIBLOC allow the user a quick and easy installation option as well as a high level of safety during installation and maintenance. It is suitable for use in house junction boxes, meter distributors, measurement transformer cabinets and telecommunications transmission stations. This signaling switch is used to signal the switch position open or closed.