ATS ATC Breaker / Contactor


Automatic Transfer Switches (ATS) are an integral component in Caterpillar® Generator systems and are responsible for transferring power between utility and generator. Today every standby generator set that is sold can utilize at least one ATS, and in some cases multiple units.

Caterpillar offers one of the broadest ranges of transfer switch products in the marketplace and incorporates a solutions-based approach for CSA/UL/IEC listed applications. Cat ATS products offer differentiated features that simplify installation, operation, and system integration, yet are suitable for a wide array of environments from residential, industrial, commercial, and governmental to critical process and life-safety applications.

Cat® ATS products utilize three transfer switch technologies to meet customer needs:

  • Molded case switch or circuit breaker
  • Power circuit breaker
  • Contactor based

Cat ATS features include:

  • Mechanically and electrically operated contactor and/or breaker
  • Availability in 2, 3, and 4 pole versions
  • UL, IEC, and CSA listed
  • NEMA 1, 3R, 4, 4X and 12 enclosures
  • Meet the requirements of NFPA 110, 99, and 70
  • IBC certification