Automatic Transfer Switches (ATS) are produced according to IEC/EN 60947-2 and CE standards and fulfill transfering functions between network and Generator. ATS s are consisted of 2 pcs 4 poles MCB and automatic control unit. When the Network Voltage is interrupted, ATS put the Generator MCB into the service and provides the feeding of the system through Generator. When the Network Voltage comes back, ATS deactivates the Generator MCB and put the Network MCB into service.