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Contactor type automatic transfer switches

Eaton’s contactor type automatic transfer switches (ATS) are designed to quickly and reliably transition critical loads between preferred and alternate/generator power sources. Ideal for use in NFPA 70 emergency, legally required, optional standby, and critical operations systems that demand reliable performance.

Contactor type automatic transfer switches
Continuous Current Rating
Up to 3000 A
System Voltage Rating
Up to 600 Vac
System Frequency Rating
50/60 Hz

Core features

  • Available in open delayed, open in-phase, and closed transition types
  • Automatic and non-automatic modes of operation 
  • Includes an interlocked, double-throw power switch driven by a robust solenoid operating mechanism
  • Service entrance rated option available with Eaton’s Arcflash Reduction Maintenance System to reduce the incident energy levels for downstream equipment during periods of maintenance
  • Indoor and outdoor enclosure types
  • Listed to UL 1008 and CSA 22.2 No. 178

Automatic transfer switches

Reliable, rugged, versatile and compact assemblies for transferring essential loads and electrical distribution systems from one power source to another.

Watch the following videos to learn more:

  • What is WCR in automatic transfer switches?
  • Choosing a transfer switch
  • Recent change to National Electric code
  • UL1008 Short-circuit WCRs

    Finding the right ATS has never been easier

    Learn about the broadest range of ATSs available in today’s critical power market

    Transfer switch 101

    Read our introductory guide to picking the right transfer switch for your environment

    Intelligent monitoring and control

    Discover the reliability, intelligence, and programming benefits of Eaton’s ATS controllers

    Built with experience

    With more than 100 years of experience, Eaton can engineer reliable solutions to meet the specific demands of your application—completely designed and customized to your needs