Concorde Solutions Rack mounted Static Transfer Switches (STS) are designed to enhance advanced backup power management solutions, adding an increased level of power quality, flexibility, availability and reliability. The purpose of a static switch in an uninterruptible power is to provide power to the load under all conditions. During normal operation the inverter is connected to the load through the static switch. However, during abnormal modes the static switch will transfer the load from the inverter (or preferred source) to the bypass (or some alternate) source of power. This configuration is referred to as a single UPS with bypass and transfer switch If two UPS is connected to load through the static transfer switch and during abnormal modes the static switch will transfer the UPS source to the other UPS source (alternate) source of power. For maximum availability applications, Concorde Solutions static transfer switch provides an automatic, seamless transfer between your critical load and the outputs of two independent UPS systems in a dual-bus power configuration. If the primary UPS should fail, the switch will automatically transfer the loads to the alternate UPS. The Concorde Solutions Static Transfer Switch is available in 16A, and 32 A 50Hz or 60 Hz rack mount models.