ATC Power Breaker Bypass Isolation Open/Closed Transition ATS

ATC Power Breaker Bypass Isolation Open/Closed Transition 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. 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.

Product Features

  • ATC-800 microprocessor-based controller
  • True RMS voltage and frequency sensing
  • Full 30-cycle short time withstand capability
  • 30-cycle, 85 kA short-time rating on power circuit breaker
  • Multiple field programmable time delays
  • Switch position indication
  • Source availability indication
  • Source 1 and 2 auxiliary contacts
  • Programmable plant exerciser
  • System test pushbutton
  • Load shed from emergency
  • Mimic diagram
  • Safe manual operation under full load with permanently affixed operating handle
  • Drawout capabilities on both ATS, bypass portions and power switching devices completely interchangeable between ATS and bypass units

Standard Equipment

Controls and Wiring
  • 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.

Additional information

Offering Type

Technical Summary - Rating Range


Technical Summary - Transfer Type

Bypass isolation, Closed transition

Technical Summary - Switch Type

Power Breaker

Ratings - Control Power

200-5000A, 2-, 3-, 4-pole<br>100% rated Short

Ratings - System Voltage Application

120-600 Vac 50/60 Hz

Ratings - Time Withstand

85,000 for 30 cycles

Ratings - Withstand

100 kAIC at 600V, 3 cycles

Ratings - Applicable Testing

CSA C22.2 No. 178 certified<br> UL 1008 listed up to 3200A<br>4000A, and 5000A UL 891 listed

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