P PT Bank BCA Tbk has prepared a data center that refers to the standards andcertifications set by the Uptime Institute, there are four criteria that we know,namely the term TIER.To supporting the needs of the data center, electrical panelsare needed which include Low Voltage Distribution Panel (LVDP) to the PanelDistribution Unit Server (PDU-IT) Panel to supply the server needs in the datacenter. Therefore it is important to know how to design and how to test theAutomatic Transfer Switch (ATS) control system and bus transfer manually orautomatically on the LVDP-A1-1 panel. Tier 4 (Fault Tolerant Site Infrastructure),which only has a downtime tolerance of 30 minutes a year, with an uptime rate of99.995%. It has a raised floor, UPS and backup generator and has a path system forhot and cold air exhaust. The security level is high because it has a 24-hour securitysystem, and is not vulnerable to planned or unplanned disturbances. Low VoltageDistribution Panel (LVDP) is a panel that receives electrical power fromtransformers and diesel generators and then divides the electrical power to sub-subpanels Sub Distribution Panel (SDP). Before designing a data center system, it isnecessary to determine the protection components and component specifications,after the components have been selected, the next step is to start the system designin terms of panel shape to system logic.