Automatic Transfer Switches (63 to 1600AMP) VERSO is not only a changeover switch but it also features integrated mains detection and enables automatic start-up and operation of the generator set in the event of a mains power cut. To increase the reliability and safety of our changeover system, VERSO now enables switch changeover. TSI is perfectly suited to applications where the transfer of a main source to a replacement source is crucial for the running of your installations. A special feature of this module is that it is automatically configured when voltage is provided from the grid side.