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The most complete line of rugged 480 VAC 30-cycle and 3-cycle UL tested switches available.
Russelectric, A Siemens Business, highlights the Russelectric RTS-30 Series of automatic transfer switches for data centers and other critical facilities. The RTS Series represents the most rugged and complete line of 480 VAC 3-cycle and 30-cycle UL-tested switches available in the market today. All Russelectric RTS-30 Series automatic transfer switches have been fully tested, listed, and labeled for 30-cycle and 3-cycle closing and withstand ratings under UL-1008. These 30-cycle ratings help simplify selective coordination in compliance with National Electrical Code (NEC) requirements for emergency and legally required standby systems, supporting the high availability demands of data center infrastructure.
The RTS-30 Series of transfer switches feature preloaded springs and an over-center mechanism driven by an electric operator for opening and closing the power contacts. During an open-transition transfer, the contact mechanism is securely locked in position until the over-center position is reached. The preloaded springs then instantaneously open the closed contacts (quick-break) and instantaneously close the open contacts (quick-make) with a momentary break in between. The quick-break feature provides for rapid full arc interruption, under maximum voltage and amperage, reducing contact erosion and increasing useful life. This robust design supports the increased mechanical and thermal demands associated with extended fault durations up to 30 cycles.
Control components and wiring can be replaced without removing the RTS-30 transfer switch from its enclosure. The neatly arranged, front-connected, flame retardant, 600-volt SIS rated switchboard wiring simplifies electrical circuitry tracing. Heavy-duty control components and contacts ensure switching requirements are easily handled. All wiring connections are labeled with sleeve-type markers, easily visible from the front of the cabinet.
RTS-30 Series open-transition transfer switches are ideal for basic transfer applications and for high inductive load transfer applications. Featuring a quick-break, quick-make, high-speed transfer mechanism, they provide positive mechanical interlocking and simple electrical operators. The switches offer rapid arc quenching. The safe external manual operator provides the same quick-break, quick-make operation as an electrical operator. They are available in both 3- and 4-pole configurations and feature front accessible wiring. With 30-cycle withstand capability, these switches accommodate the full range of short-time overcurrent protective device settings, helping engineers and operators simplify coordination studies and reduce system design complexity in high-density electrical environments.
Also available are RTS-30 Series closed-transition transfer switches, which offer rapid closed-transition retransfer to the preferred source and for testing – with zero power interruption. This switch provides high-speed quick-break, quick-make, open-transition transfer upon the loss of the preferred power source. These switches also feature simple electrical operators and rapid arc quenching. They are available in 2-, 3-, and 4-pole configurations and feature front accessible wiring. The enhanced durability of 30-cycle rated designs ensures continued performance even after exposure to fault conditions, supporting uninterrupted operation of servers, cooling systems, and critical IT infrastructure.
By enabling coordination with a wide range of circuit breakers, including those with extended trip delays, RTS-30 Series switches provide greater flexibility for future system modifications and expansions, while minimizing the risk of downtime that could impact data integrity, uptime commitments, and service level agreements.
More information about the Russelectric RTS-30 Series of automatic transfer switches for data centers
RTS-30 Series of automatic transfer switches brochure