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ATC Contactor Based Bypass Isolation Automatic Transfer Switch

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ATC Contactor Based Bypass Isolation Automatic Transfer Switch 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.

Enclosure
  • 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.

ATC Contactor Based Bypass Isolation Automatic Transfer Switch Optional Equipment

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

Optional Delayed Transition includes:
  • Time delay neutral
  • Pre-transfer signal with 1 N.O. and 1 N.C. contacts

Overview

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.

Technical Summary

Units:
Rating Range 100 to 1200A 100 to 1200A Less
Transfer Type Bypass Isolation Bypass Isolation Less
Switch Type Contactor Based Contactor Based Less

Ratings

Control Power 100-1200A 2-, 3-, 4-pole 100-1200A 2-, 3-, 4-pole Less
System Voltage Application 120 - 600 Vac, 50/60 Hz 120 - 600 Vac, 50/60 Hz Less
Withstand Up to 65 kAIC withstand Up to 65 kAIC withstand Less
Applicable Testing CSA C22.2 No. 178 certified
IBC 2006, CBC 2007 and OSHPD
CSA C22.2 No. 178 certified
IBC 2006, CBC 2007 and OSHPD
Less

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

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