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Electric Power Generation

ATC Power Breaker & Case Switch Automatic Transfer Switch

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Overview

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.

Technical Summary

Units:
Rating Range 200 to 5000A 200 to 5000A Less
Transfer Type Open Transition Open Transition Less
Switch Type Power Breaker Power Breaker Less

Ratings

Control Power Fixed Mount 200-3200A 2, 3, or 4 Pole
Drawout 200-5000A 2-, 3-, 4-pole Fixed Mount 200-3200A 2, 3, or 4 Pole
Drawout 200-5000A 2-, 3-, 4-pole		 Less
System Voltage Application 120 - 600 Vac, 50/60 Hz 120 - 600 Vac, 50/60 Hz Less
Time Withstand 85,000 for 30 cycles 85,000 for 30 cycles Less
Withstand 100,000 amps withstand/closing/ interrupting at 600 Vac 100,000 amps withstand/closing/ interrupting at 600 Vac 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-800 microprocessor-based controller
  • Voltage and frequency sensing
  • Fastest switching times available (<3 cycles)
  • Full 60-cycle short time withstand capability
  • Multiple field programmable time delays
  • Switch position indication
  • Source availability indication
  • Safe manual transfer under load
  • Source 1 and 2 auxiliary contacts
  • Programmable plant exerciser
  • System test pushbutton
  • Load shed from emergency
  • Mimic diagram
  • True RMS three phase voltage sensing on Source 1, Source 2 and Load
  • Frequency sensing on Source 1 and Source 2
  • Mechanical (cable) and electrical interlocking to prevent paralleling of sources
  • Safe manual operation under full load with permanently affixed operating handle
  • Ambient temperature range: -40°C to 40°C (-40°F to 104°F)
  • Operating temperature range: -20°C to 70°C (-4°F to 158°F)
  • Operating humidity: up to 90%
  • Relative humidity (non-condensing)
  • Source paralleling duration is limited to 100 msec or less
  • Source availability indication

ATC Power Breaker & Case Switch 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 Power Breaker & Case Switch Automatic Transfer Switch Optional Equipment

Available Options
  • 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

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

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