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ATC Contactor-Based Automatic Transfer Switch

Cat® transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. The open and delayed transition contactor-based Automatic Transfer Switch (ATS) provides fully functioning transfer in Applications where a momentary loss of power is acceptable during transfer and retransfers between normal and emergency power supply.

The closed transition contactor-based ATS is designed to Meet application requirements where emergency back up power is required with no momentary loss of power by connecting both sources before the transfer occurs. Closed transition also permits periodic testing of the emergency power source without interrupting power to the loads.

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    Product Specs

    Technical Summary

    Rating Range 40-1600A
    Transfer Type Open / Closed Transition
    Switch Type Contactor Based


    Control Power Wall Mount 40-600A 2 or 3 Pole
    Floor Standing 600A 4 Pole & 800-1200A 2, 3, or 4 Pole
    Two-Position Contactors Two-position contactors 40-400A
    Three-Position Contactors Three-position contactors 40-1200A
    System Voltage Application Up to 600 Vac, 50/60 Hz
    Applicable Testing UL 1008 listed, CSA C22.2 No. 178 certified, IBC 2006, CBC 2007 and OSHPD