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ATC Power Breaker Bypass Isolation Open/Closed Transition Automatic Transfer Switch

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Cat transfer switches are designed for a variety of standby power applications. They provide flexibility, reliability and value in a compact package. A Bypass Isolation Automatic Transfer Switch (ATS) provides fully functioning transfer in applications where emergency power to critical loads must be maintained at all times with no interruption. This type of design allows for inspection, maintenance or replacement of the power switching mechanisms with no interruption in electrical service. Breaker based Bypass isolation ATS are available from 200A to 5,000A.

Pricing: Contact for Pricing Why we quote: Cat® machines are often configured to your job (attachments, hydraulics, cab options) and freight/taxes can vary by location. Request a quote to get accurate pricing based on your exact setup—typically within 1–2 business days.

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    Rating Range 200-5000A
    Switch Type Power Breaker
    Transfer Type Bypass isolation, Closed transition
    Applicable Testing CSA C22.2 No. 178 certified
    UL 1008 listed up to 3200A
    4000A, and 5000A UL 891 listed
    Control Power 200-5000A, 2-, 3-, 4-pole
    100% rated Short
    System Voltage Application 120-600 Vac 50/60 Hz
    Time Withstand 85,000 for 30 cycles
    Withstand 100 kAIC at 600V, 3 cycles

    Standard Equipment:

    • All controls relays and industrial grade relays are totally encapsulated to minimize exposure to dust and dirt. Lugs are 90º rated and all control wire is #16 AWG, type XLPE with a 125º temperature rating.
    • Durable powder-coated steel NEMA 1, 3R or 12 enclosures with three door hinges to ensure proper support of the door and door mounted devices. The hinges have removable hinge pins to facilitate door removal for easy wall mounting or service and are supplied with pad-lockable latches.

    Optional Equipment:

    • Surge suppression
    • Field selectable, multi ratio, control voltage transformer 50/60 Hz
    • Integrated service entrance
    • Space heaters
    • Remote communications
    • Multi-meter options available
    • 2- or 4-position test switch
    • Selectable automatic or non-automatic operation
    • Open or closed transition
    • Load sequencing contacts
    • Integral overcurrent protection
    • Seismic Zone 4 Qualified (BOCA, CBC, IBC, UBC and OSHPD)
    • Pre-transfer signal with 1 N.O. and 1 N.C. contacts
    • Time delay neutral
    • In-phase transition

    What Our Customers Are Saying About Us

    Gregory Poole Equipment Company place picture
    4.0
    Based on 58 reviews
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    Tom Corona profile picture
    Tom Corona
    21:51 06 May 26
    Rich Stidd profile picture
    Rich Stidd
    22:10 02 May 26
    John Karpathian profile picture
    John Karpathian
    16:21 24 Jan 26
    Clean store and great employees
    Hunter Flaugher profile picture
    Hunter Flaugher
    12:56 06 Aug 25
    Hydraulic pump shop is unmatched. I made the mistake of going somewhere else before bringing my pump here. These guys were more than helpful and friendly. Went out of their way to help me find a solution for my problem even when it didn’t benefit them. This is how businesses should be run. I won’t go anywhere else.
    Brian Hrudka profile picture
    Brian Hrudka
    16:45 12 Feb 25
    Too bad Poole Cat Field Service is better at invoicing than actually getting my machines moving.

    A prompt and courteous technician arrived, and correctly diagnosed two problems with my mini Ex. Thank you. I corrected those problems, but machine still did not work.

    He diagnosed a fuel problem as a clogged filter, rather than a bad fuel pump which I managed to diagnose. I also figured out, via help on the internet, that the fuel shut-off solenoid was bad.

    Machine runs fine now. So my advice is to check the internet, before letting Poole charge you $870 for a two hour field visit. And you can find a perfectly fine aftermarket fuel pump for $20 rather than the $250 that Poole charges... and it arrives faster,
    Jacey Price profile picture
    Jacey Price
    21:04 05 Dec 24
    Need to teach a tech how to drive a service truck. Around 2:48 on highway 40 east, the truck pictured (plate ending in 8236) flew across 3 lanes of traffic to meet the Cleveland rd exit. Almost hit a semi and caused me to swerve with my children in the car. Glad making the exit was more important than children’s lives.
    David Lawrence profile picture
    David Lawrence
    13:04 22 Feb 24
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    Brandon Pierce
    22:00 18 Feb 24
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    Darin Noe
    01:17 16 Feb 24
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    Jose Soto
    15:26 23 Sep 23
    Hunter Elliott profile picture
    Hunter Elliott
    16:17 07 Sep 23
    Rick Kelly-Crapse profile picture
    Rick Kelly-Crapse
    21:06 25 Aug 23
    They had all my parts for my 3208 Cat.
    Friendly folks at parts counter.