The design of SDF units type IN1 is based on the innovative QUAD BREAK’ principle. This design enables a drastic reduction in the intensity of arc, which is produced at the time of breaking. During breaking the current path is broken at four places in series, thus the arc is reduced. This leads to less strain on the contacts and the life of the switch is increased.The moving contacts are designed to make two parallel current paths, which produce high electro-magnetic attraction forces during high faults and increase the contact pressure, this eliminates chance of arcing at the contacts and allows the fuse to safely clear the fault. The self-cleaning contacts ensure wiping of deposits during each operation and increase the life of the contacts. Telescopic shaft feature enables the operating shaft extension up to 25mm.
The isolating switch is intended for outdoor usage and suitable for TNB road lighting system especially during service and maintenance. This mini isolator is designed with prewired connecting cord load and line with capability of IP66.
