Front Operated Switch Fuses, OS Series

Reliability and performance
OS switch fuses are the optimal solution for motor protection. They can be installed next to transformers in heavy industry. The contact design combined with the fuse link enables rapid fault clearance and maintains protection level even after a fault occurs. Our motorized switch fuses protect motors from overcurrent and can be operated both remotely and manually.

Safe maintenance and operation
OS switch fuses are designed for personal safety as well as for reliable process protection. When in the ON position, the interlocked fuse protection covers cannot be removed. When in the OFF position, the fuse link is fully isolated from both ends. Also, the handle is padlockable with three separate padlocks for ensured safety.

Proven and practical
Test proven type 2 coordination tables for the OS switch fuses are available online 24/7. From there you can easily select the appropriate ABB components for motor starting and protection.These motor starting solutions also help minimize the time needed for sizing all the starter components and ensure reliable operation after a fault occurs.