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ATC Power Breaker & Case Switch Automatic Transfer Switch

ATC Power Breaker & Case Switch 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 transition power case switch-based Automatic Transfer Switch (ATS) will provide fully functioning transfer in applications where a momentary loss of power is acceptable on retransfer from emergency to normal power supply. The Cat power case switch-based ATS also permits periodic testing of the emergency source without interrupting power to the loads and are available from 200 to 5000.

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Rating Range200 to 5000A

Transfer TypeOpen Transition

Switch TypePower Breaker

Control PowerFixed Mount 200-3200A 2, 3, or 4 Pole
Drawout 200-5000A 2-, 3-, 4-pole

System Voltage Application120 - 600 Vac, 50/60 Hz

Time Withstand85,000 for 30 cycles

Withstand100,000 amps withstand/closing/ interrupting at 600 Vac

Applicable Testing
CSA C22.2 No. 178 certified

IBC 2006, CBC 2007 and OSHPD


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.


Load sequencing contacts

Multi-meter options available

Controller availability: ATC-100, ATC-300+,and ATC-800

2- or 4-position test switch

Remote communications

Integral overcurrent protection

Field selectable, multi ratio, control voltage transformer 50/60 Hz

Suitable for service entrance

Space heaters

Open or closed transition

Surge suppression

Selectable automatic or non-automatic operation


Time delay neutral

In-phase transition

Pre-transfer signal with 1 N.O. and 1 N.C. contacts



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