They are used for industrial applications requiring a high breaking capacity.They perform the disconnector function and must not be used as switches (Utilization category: AC-20).They can be equipped with an indicator light indicating blowing of the fuse cartridge.They meet IEC/EN 60947-3 standard requirements.Disconnection of all poles is guaranteed for the 2P, 3P, and 3P+N versions during factory assembly.Fuse cartridges:
STI can use both gG and aM fuse cartridges without strikergG fuses: used to provide both overload and short-circuit protectionaM fuses: used to provide only short-circuit protection of loads with high peak current such as motors, transformers primaries, etc.)Available in both 8.5 x 31.5 mm and 10.3 x 38 mm diametersFuse cartridges meet IEC/EN 60269-1/2 (NFC 60-200).AccessoriesComb busbar:used to quickly bridge several STI of the same kind.Busbar connectors:Used to supply the busbarFor 25 mm2 cable230 V neon indicator lightIndicates fuse blowing (off in normal operation and lit red after fuse blowing).400 V maxi.Padlocking device Locks the toggle in the "open" or "closed" position. Used with an 8 mm max. diameter padlock (not supplied).Clip-on markers (C60 type): used to identify:either on the front face of the device or on the downstream terminals.