CTG Series Automatic Transfer Switch

CTG Series Automatic Transfer Switch

The Cat® CTG Series Automatic Transfer Switches (ATS) are pre-configured for applications requiring the dependability and ease of operation found in a full feature power contactor type transfer ...
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Technical Summary

Rating Range
40-3000A
Transfer Type
Open transition
Switch Type
Contactor based

Features

  • Ratings 40 to 3000 amps (2, 3 or 4 poles)
  • UL 1008 listed at 480 VAC
  • CSA certified at 600 VAC (200-225 amp - 480V)
  • IEC listed at 480 V
  • Double throw, mechanically interlocked contactor mechanism
  • Electrically operated, mechanically held
  • Designed for emergency and standby applications
  • Available in standard open transition (CTG)or delayed transition (CTGD) models
  • Ringing wave immunity per IEEE 472 (ANSI C37.90A
  • Conducted and Radiated Emissions per EN55022 Class B (CISPR 11) (Exceeds EN55011 & MILSTD 461 Class 3)
  • ESD immunity test per EN61000-4-2 (Level 4)
  • Radiated RF, electromagnetic field immunity test per EN61000-4-3 (ENV50140) 10v/m
  • Electrical fast transient/burst immunity test per EN61000-4-4
  • Radiated RF, electromagnetic field immunity
  • Surge immunity test per EN61000-4-5 IEEE C62.41 (1.2 X 50 ms, 5 & 8 kV)
  • Conducted immunity test per EN61000-4-6 (ENV50141)
  • Voltage dips and interruption immunity EN61000-4-11
  • Seismic Compliance to IEEE-693-2005 and IBC-2003

Design and Construction Features

  • Close differential 3 phase under-voltage sensing of the normal source - factory standard setting 90% pickup, 80% dropout (adjustable);under frequency sensing of the normal source factory setting 95% pickup (adjustable)
  • Voltage and frequency sensing of the emergency source - factory standard setting 90% pickup voltage, 95% pickup frequency (adjustable)
  • Test switch (fast test/load/no load) to simulate normal source failure - automatically bypassed should the emergency source fail
  • Type 1 enclosure is standard - also available in open style or Types 3R, 4, 4X, or 12
  • Standard Equipment:

    Optional Equipment:

      Options
      • Plant Exerciser, clock type (load/no load): Allows the generator to start and run unloaded or to simulate a power failure, start generator and run under load (7-14-28-365 days, user selectable)
      • Space heater and thermostat
      • Network communications interface card (LonWorks / ModBus)
      • Maintained Test Switch
      • Maintained Test Switch w/Keypad
      • Service entrance configuration
      • Auxiliary Contact, operates on Source 1 line failure
      • Auxiliary Contact, operates on Source 2 availability
      • Auxiliary Contacts: Closed when the transfer switch is in Source 2 position
      • Auxiliary Contacts: Closed when the transfer switch is in Source 1 position
      • Disconnect Switch: Permits transfer in “AUTO” position and inhibits transfer in “INHIBIT” position. (Standard 800A and above)
      • Elevator Pre-Signal Auxiliary Contacts: Open 0-60 seconds prior to transfer to either direction, re-closes after transfer
      • Universal Motor Load Disconnect Circuit: Auxiliary Contact opens 0-60 seconds prior to transfer in either direction, re-closes after transfer. Can be configured by end user for Pre-transfer, Post-transfer, or both.
      • Voltage Imbalance Monitor (Three Phase)
      • Lockable, see-through cover for ATS controller
      • Power Measurement Meters
      • Note:For applications requiring additional options or other configurations, see the CTS Series fully configurable transfer switch.