Download BrochureAB Switch & Isolators MCCB & Switch Fuse Units
Isolator is a manually operated mechanical switch that isolates the faulty section of substation. It is used to separate faulty section for repair from a healthy section in order to avoid the occurrence of severe faults. It is also called disconnector or disconnecting switch.
Air break switches are used in overhead power transmission lines. Here, these switches are mainly used to perform on/off switching by connecting the power system of a part of the overhead line to the main distribution line or by disconnecting it from the main distribution line.
Switch fuse unit is compact combination, generally metal enclosed of a switch and a fuse. It is very widely used for low and medium voltages. The ratings of switch fuse units are in the range of 30,60,100,200, 400, 600 and 800 amperes. Switch fuse units are available as 3 pole and 4 pole units.
The difference between an air break switch and an isolator includes the following. This is an electrical switch, used to break the circuit within the air. An isolator is a mechanical switch that allows input and output isolation for a device within the open position.