The SIK comes with adequate air cooling systems. It is having one knob control to select the output current. Separate knob provided for coarse control. The SIK is generally called as Relay test set when used for testing of relays .This can be utilized for current injections during commissioning of protection Relay systems, testing of equipments like Ammeters, voltmeters , transducers, energy meters in power sub stations.25A with 3ph AC output with provision of DC output model is also available.