ATS MX Contactor

CTG Series Automatic Transfer Switch

CTG Series Automatic Transfer Switch

Features At A Glance

Design and Construction Features

Product Specifications for CTG Series Automatic Transfer Switch

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Technical Summary

CTG Series Automatic Transfer Switch Standard Equipment

Standard Features

  • Auxiliary Contact:
    Closed when the switch is in the normal position
    (Additional contacts optional)
  • Time Delay to Engine Start: Standard setting 3 seconds, adjustable 0-10 seconds
  • Peak Shave/Remote Load Test: Input for peak shave or remote load test; includes automatic return to normal if emergency source fails and normal is present; 120 VAC
  • Indicating LED Pilot Lights:
    -Switch in emergency position
    -Switch in normal position
    - Normal source available
    -Emergency source available
  • When specified for use with a CTGD Series delayed transition switch, the control panel also includes the following:
  • Event Log OD 16 Event that track date, time, reason and action taken
  • Time Delay on Retransfer to Normal: To delay retransfer to normal source (immediate retransfer on generator set failure); standard setting 30 minutes, adjustable 0-60 minutes
  • 7, 14, 28 day interval timed exerciser, pushbutton/timer operation
  • Test Switch - Momentary
  • In-Phase Monitor, self-adjusting (Not available on CTGD models)
  • Auxiliary Contact:
    Closed when the switch is in the emergency position
    (Additional contacts optional)
  • Push button Bypass of time delay and normal emergency
  • Voltage and Frequency Indication for S1 and S2
  • Engine Start Contact

MX150 Control Panel

  • LED/LCD indicators for ease of viewing and long life
  • Time Delay for Engine Cool Down: Allows engine to run unloaded after switch retransfer to normal; standard setting 5 minutes, adjustable 0-60 minutes
  • Inputs opto-isolated for high electrical immunity to transients and noise
  • Built-in diagnostics with LCD display for immediate troubleshooting
  • Nonvolatile memory (exerciser battery backup not required for standard operation)
  • Processor and digital circuitry isolated from line voltage
  • Communications header for network interface
  • Time Delay on Transfer to Emergency: To delay transfer to emergency after verifying emergency source available; standard setting 1 second, adjustable 0-5 minutes
  • Timer and voltage/frequency settings adjustable without disconnection from power sources

CTG Series Automatic Transfer Switch Optional Equipment


  • Service entrance configuration
  • Auxiliary Contacts: Closed when the transfer switch is in Source 1 position
  • Elevator Pre-Signal Auxiliary Contacts: Open 0-60 seconds prior to transfer to either direction, re-closes after transfer
  • Space heater and thermostat
  • Auxiliary Contact, operates on Source 1 line failure
  • Note:For applications requiring additional options or other configurations, see the CTS Series fully configurable transfer switch.
  • Auxiliary Contact, operates on Source 2 availability
  • 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)
  • Network communications interface card (LonWorks / ModBus)
  • 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.
  • Auxiliary Contacts: Closed when the transfer switch is in Source 2 position
  • Power Measurement Meters
  • Maintained Test Switch
  • Disconnect Switch: Permits transfer in “AUTO” position and inhibits transfer in “INHIBIT” position. (Standard 800A and above)
  • Lockable, see-through cover for ATS controller
  • Voltage Imbalance Monitor (Three Phase)
  • Maintained Test Switch w/Keypad

See how CTG Series Automatic Transfer Switch compares against frequently compared products.

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