Automatic Transfer Switches

  • Ensure uninterrupted power when utility outages strike. Our Automatic Transfer Switches (ATS) collection at Portlandia Electric Supply delivers reliable, automatic switching between power sources—ideal for homeowners, businesses, and industrial facilities requiring instant power continuity. 

    Why Choose ATS from Portlandia Electric Supply?

    We offer a wide variety of ATS units from trusted brands such as:

    • Generac — Service-rated switches with ampacity ranging from 100 A to 400 A in single-phase, and three-phase options up to 400 A. They are UL 1008 compliant and rated for NEMA 3R enclosures. 

    • Cummins — Reliable models like the RA 100 A NSE (240 V, single-phase) and RA 150 A SE (240 V, single-phase), designed for robust residential and light commercial backup systems. 

    • Champion — Compact, user-friendly switches such as the 50 A 10-circuit NEMA 3R or whole-house 150 A model, both optimized for general residential use. 

    Key Features at a Glance

    • Automatic Detection & Switching — Load transitions occur instantly between utility and generator, safeguarding sensitive equipment and essential circuits. 

    • Amp Range & Configuration Options

      • Single-phase: 100 A, 150 A, up to 400 A

      • Three-phase: 200 A and above

      • NEMA 3R outdoor enclosures ensure weather-resistance. 

    Best for These Installations

    • Residential Homes — Maintain lighting, HVAC, and appliances during outages with models like 50 A to 150 A single-phase switches.

    • Light Commercial & Small Businesses — Ideal for 100–400 A systems powering retail, offices, or clinics using Generac or Cummins ATS.

    • Critical Infrastructure — Hospitals, data centers, and facilities relying on rapid, dependable switching under load.

    Quick Benefits

    • Uninterrupted Power Flow — Automatic transitions protect against downtime and potential damage.

    • Quality Assurance — Products from leading brands like Generac, Cummins, and Champion offer durability and compliance with standards.

    • Flexibility & Scale — A variety of amperage ratings and configurations (single/three-phase) meet diverse system needs.

    At Portlandia Electric Supply, our ATS collection simplifies backup power planning. From single-family homes to mission-critical facilities, we offer the equipment you need—paired with fast delivery, bulk pricing, and expert B2B support.