Acti9 STI isolatable fuse-carriers provide overload and short-circuit protection:

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 striker
gG fuses: used to provide both overload and short-circuit protection
aM 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 diameters
Fuse cartridges meet IEC/EN 60269-1/2 (NFC 60-200).

Accessories:

Comb busbar:
- used to quickly bridge several STI of the same kind
Busbar connectors:
- Used to supply the busbar
- For 25 mm2 cable
230 V neon indicator light
- Indicates 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.

Acti9 STI

Fuse-carrier disconnector