This ATS product is equipped with two independent power inputs to supply the load with power via a primary power source. Should the primary power source fail, the secondary automatically takes over the supply to the connected devices without interruption. The switchover time from one line to the other is seamless for the connected devices. After switching to a secondary power source, the ATS can also switch the power supply back to the primary input as soon as the power supply to the primary input is restored. In Switzerland, the connection and commissioning of a UPS with > 3.5 kVA must be clarified in advance with the local electricity provider. The connection must be carried out by an electrician.