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ATC Service Entrance Rated MCCB & Power Breaker Based ATS

Cat® Service Entrance Rated (SER) automatic transfer switches (ATS) are designed to provide standby power emergency power to entire installation loads to protect against utility power interruption; yet allow the ATS to be as close as possible to the point of service entrance. By safely and in code compliance, integrating the necessary overcurrent protection and service disconnecting means into the automatic transfer switch, a single installation can be made at the service entrance. This design eliminates the need for a separate upstream fault protection and respective interconnections, which in turn reduces installation space, time, and cost. Breaker-based Service Entrance Rated transfer switches are available from 30A to 5000A.

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    Product Specs

    Technical Summary

    Rating Range 30-5000A
    Transfer Type Open / Closed / Delayed
    Switch Type Molded Case and Power Breaker


    MCCB 30-1000A 2, 3, or 4 Pole
    Fixed Mount Power Breaker 200-3200A 2, 3, 4-Pole
    Drawout Power Breaker 200-5000A 2, 3, or 4-Pole
    System Voltage Application 120-600 Vac 50/60 Hz
    Withstand (Power Breaker) Up to 100 kAIC at 600V 3 cycles
    Applicable Testing
    UL 1008 listed up to 3200A

    4000A, and 5000A UL 891 listed