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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. Contactor -based Bypass Isolation ATS are available from 100A to 1200A.

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Technical Summary
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Rating Range 100 to 1200A 100 to 1200A
Transfer Type Bypass Isolation Bypass Isolation
Switch Type Contactor Based Contactor Based

Product Features

  • ATC-300+ or ATC-800 microprocessor-based controller
  • True RMS voltage and frequency sensing
  • Maintains fully automatic capability while in bypass mode (optional)
  • Single motion rack-out with the door closed
  • 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
  • Ability to test power switching isolated components

ATC Contactor Based Bypass Isolation Automatic Transfer Switch Standard Equipment

Controls and Wiring
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  • 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.

ATC Contactor Based Bypass Isolation Automatic Transfer Switch Optional Equipment

Available Options
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  • Space heaters
  • 2- or 4-position test switch
  • Multi-meter options available
  • Open, closed or delayed transition
  • Drawout capabilities on both ATS bypass portions and power switching devices completely interchangeable between ATS and bypass units
  • Load sequencing contacts
  • Dual drawout type is field configurable for top or bottom conduit entry
  • Field selectable, multi ratio, control voltage transformer 50/60 Hz
  • Seismic Zone 4 Qualified (BOCA, CBC, IBC, UBC and OSHPD)
  • Remote communications
  • Surge suppression
  • Selectable automatic or non-automatic operation