Manual operated switch fuses Designed for extreme conditions OS switch fuses from 20 to 1250 Amperes have been designed for superior level of protection even in the most demanding applications. Reduced testing and design costs Tested type 2 co-ordination tables for motor protection are available. This enables a fast and easy selection of motor control devices. Save installation time and cost Thanks to a modular structure the mechanism and poles can be located according to installation requirements. The length of the shaft is adjustable. Optimal use of space OS switch fuses are compact, allowing installation in smaller enclosures. High performance and reliability The contact design that in combination with the fuse link enables rapid fault clearance and maintains protection level even after fault occurs. OS switches are the optimal solution for motor protection. They can be installed next to transformers in heavy industry.