For maximum availability applications, Liebert STS2 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 Liebert Static Transfer Switch 2 (STS2) is available in 100A, 250A, 400A, 600A, 800A and 1000A sizes, 60Hz or 50Hz field selectable. Multiple input voltages are available. The system provides an automatic, seamless transfer between the outputs of two independent UPS systems and the input of a critical load in a dual-bus power system.
The solid-state bus transfer switch is the enabling technology behind dual-bus power systems. These devices are connected between your critical load and the outputs of two independent UPS systems. If the primary UPS should fail, the switch will automatically transfer the loads to the surviving UPS.
The STS 2 has triple-redundant logic. Each DSP controller is capable of working independently, and each helps monitor the other two. If one malfunctions, the other two lock it out. Each controller has power feeds from both power supplies. Available in 100 to 1000 Amps.
