A transfer switch's main function is to redistribute power from a grid to a backup source of power.
Generally, normal power is provided by a utility company. When the primary power source stops working or fails to deliver required load, load is automatically transferred to generator through ATS panel
In the data center, it is vitally important to have uninterrupted power. To achieve this goal, the systems in the power path must be properly maintained and tested. To ensure reliability in the event of a power outage, data center administrators need to routinely monitor the ATS. ATS units can channel considerable amounts of energy, which can put heavy stress on the electrical contacts involved, so regular maintenance is critical.