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Caterpillar

ATC Molded Case Circuit Breaker & Molded 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 breaker-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 Open Transition MCCB & MCS types of ATS also permits periodic testing of the emergency source without interrupting power to the loads and are available from 30 to 1000 amperes.

Photos

  • ATC Molded Case Circuit Breaker & Molded Case Switch Automatic Transfer Switch
    ATC Molded Case Circuit Breaker & Molded Case Switch Automatic Transfer Switch

Documents

Features

Product Features

Product Features

  • ATC-100, ATC-300+ or ATC-800 microprocessor-based controller
  • Mechanical (cable) and electrical interlocking to prevent paralleling of sources
  • Voltage and frequency sensing
  • Multiple field programmable time delays
  • Switch position indication
  • Source availability indication
  • Safe manual transfer under load
  • Source 1 and Source 2 auxiliary contacts
  • Programmable plant exerciser
  • System test pushbutton
  • Load Shed from emergency (ATC-800 only)
  • Mimic diagram
  • Mechanical (cable) and electrical interlocking to prevent paralleling of sources
  • Safe manual operation under full load with permanently affixed operating handle
  • Ambient temperature range: -40C to 40C (-40F to 104F)
  • Operating temperature range: -20C to 70C (-4F to 158F)
  • Operating humidity: up to 90%
  • Relative humidity (non-condensing)
  • Frequency sensing on Source 1 and 2
  • True RMS three phase voltage sensing on Source 1, Source 2 and load

Product Features

  • ATC-100, ATC-300+ or ATC-800 microprocessor-based controller
  • Mechanical (cable) and electrical interlocking to prevent paralleling of sources
  • Voltage and frequency sensing
  • Multiple field programmable time delays
  • Switch position indication
  • Source availability indication
  • Safe manual transfer under load
  • Source 1 and Source 2 auxiliary contacts
  • Programmable plant exerciser
  • System test pushbutton
  • Load Shed from emergency (ATC-800 only)
  • Mimic diagram
  • Mechanical (cable) and electrical interlocking to prevent paralleling of sources
  • Safe manual operation under full load with permanently affixed operating handle
  • Ambient temperature range: -40C to 40C (-40F to 104F)
  • Operating temperature range: -20C to 70C (-4F to 158F)
  • Operating humidity: up to 90%
  • Relative humidity (non-condensing)
  • Frequency sensing on Source 1 and 2
  • True RMS three phase voltage sensing on Source 1, Source 2 and load

Specifications

  • Technical Summary
    Spec Value
    Rating Range 30-1000A
    Transfer Type Open transition
    Switch Type Molded Case
  • Ratings
    Spec Value
    Control Power 30-1000A 2, 3, or 4 Pole, 100% Rated
    System Voltage Application 120 - 600 Vac, 50/60 Hz
    Withstand 100,000 amps withstand/closing/ interrupting at480 Vac
    Applicable Testing CSA C22.2 No. 178 certified
    IBC 2006, CBC 2007 and OSHPD

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, NEMA 3R and NEMA 12 are available with ATC-100 and ATC-300+ controllers. NEMA 4 is only available with the ATC-800 controller. The enclosures are Seismic Qualified (BOCA, CBC, IBC, UBC). The hinges have removable hinge pins to facilitate door removal for easy wall mounting or service and are supplied with pad-lockable latches.

Optional Equipment

Available Options

  • Suitable for service entrance
  • Load sequencing contacts
  • Selectable automatic or non-automatic operation
  • Controller availability: ATC-100, ATC-300+,and ATC-800
  • Field selectable, multi ratio, control voltage transformer 50/60 Hz
  • Surge suppression
  • Multi-meter options available
  • Integral overcurrent protection
  • Space heaters
  • Remote communications
  • Communications for the ATC-300+ Controller via RS-232 or Modbus through an integrated RS-485 port
  • 2- or 4-position test switch

Optional Delayed Transition includes:

  • Pre-transfer signal with 1 N.O. and 1 N.C. contacts
  • Time delay neutral