Eaton Static Auto Tie

Eaton's Static Auto Tie (SAT) system enhances reliability even further so full load transfers can be made autonomously. The Eaton SAT system adds a wrap-around static switch to the tie breaker in a Hot-Tie system, then adds intelligent controls so a power protection system made up of two or more separate UPS systems can automatically transfer entire loads in the event of traumatic, catastrophic failure of one system--a rare but costly circumstance.

In the Static Auto Tie configuration displayed in the diagram below, there is a "hot-tie" circuit between the outputs of the two UPS modules that automatically transfers the loads from one to the other as necessary. This less complex, dual-path architecture streamlines the distribution system to eliminate series switching and reduce the potential downtime of single power cord loads by up to 50 percent. As a result, the Static Auto Tie architecture offers a number of benefits, including:

  • Reduced capital expenses
  • Eliminates the need for traditional downstream static transfer switches
  • Reduced installation costs
  • Increased reliability
  • Increased efficiency
  • Decreased maintenance requirements
  • Reduced raised-floor space requirements
Fully Deployed Diagram - Data Center Dynamics

Static Auto Tie is available for the Eaton 9315 and 9395 UPS models. Please read our brochure for additional information. Also available is a technical white paper discussing the mean time between failure calculations.