Electric Power

  • Specs Summary
  • Rating Range
    40-400A
  • Transfer Type
    Open transition
  • Switch Type
    Contactor Based
  • Control Power

CTX Series Automatic Transfer Switch


Cat® CTX Series switches are built for residential and light commercial applications requiring the dependability and ease of operation found in a power contactor switch.

Voltage sensing and system control is performed via a state-of-the-art microcontroller located on the cabinet door.

Technical Summary

  • Rating Range 40-400A
  • Transfer Type Open transition
  • Switch Type Contactor Based

Electrical Ratings

Controller Specifications

Standard Equipment

The unit is available in open type, NEMA 1 or NEMA 3R enclosures. The MX-60 control panel adds a user interface and functionality, including:

  • Indicating LEDs for power availability, switch position and load energized
  • Pushbuttons for test, exercise set, timer bypass and program cancel
  • Special status annunciation of in-phase transfer and times operation
  • Selectable 7, 14, 21 or 28 day (factory set 28 days) generator exerciser timer
  • Diagnostic LED indications in logical one-line configuration

Additional options include:

  • A3/A4 Auxiliary contacts (1 each) closed in utility and generator positions
  • Special timer settings

Optional Equipment