400ATS Service Entrance Power Transfer Switch advanced relay
Briggs & Stratton

400ATS Service Entrance Power Transfer Switch advanced relay


  • Works with Generac and Briggs Units.
  • The SERIES 300 is listed to UL 1008 standard for total system loadsand CSA standard C22.2 for automatic transfer switches.
  • Meets NFPA 110 for Emergency and Standby Power Systems..​
  • Easy-to-navigate 128x64 graphical LCD display with keypad provides LED indicators for switch position, source availability, not in auto mode, and alert condition.​


  • No danger of the SERIES 300 ATS transferring loads to a dead source because the unique ASCO single-solenoid operator derives power to operate from the source to which the load is being transferred.
  • Integrated multilingual user interface for configuration and monitoring.
  • Adjustable time-delay feature prevents switch from being activated due to momentary utility power outages and generator dips


  • Fire/Alarm/Security
  • Banking, Financial and Insurance
  • Broadcast and Entertainment
  • Construction and
  • Engineering
  • Data Center/Colocation/Hosting
  • Education
  • Government
  • Healthcare
  • Manufacturing
  • Power Generation
  • Power/Gas Transmission and Distribution
  • Retail and
  • Wholesale
  • Telecom
  • Transportation
  • Water Supply/Sewage Disposal