Controller Specifications

Source Sensing
120 - 690 VAC +/- 1% of nominal voltage (+/- .05 Hz, +/-.5 A)
Control Power
120 VAC
Communications Interface (optional)
Serial RS-485 upt to 115.2 Kbps or TCP/IP (10/100 base-T)
Undervoltage dropout for source 1 and source 2
75-99% of nominal
Undervoltage restore for source 1 and source 2
85-100% of nominal
Underfrequency dropout for source 1 and source 2
45 - 59.9 Hz
Underfrequency restore for source 1 and source 2
45 - 59.5 Hz
Overvoltage dropout for source 1 and source 2
105 - 110% of nominal
Overvoltage restore for source 1 and source 2
103 - 108% of nominal
Overfrequency dropout for source 1 and source 2
50.1 - 63 Hz
Overfrequency restore for source 1 and source 2
50 - 62.9 Hz
Voltage unbalance on dropout for source 1 and source 2
5 to 20% of nominal
Voltage unbalance for restore for source 1 and source 2
4 to 19% of nominal
Load control relay contacts
rated for 10A @ 24VDC or 120VAC
Load control relay contacts
0-259 minutes
Delay for engine cool down (U)
0-60 minutes
Delay transfer to nonpreferred source (W)
0-5 minutes
Delay NeutralTransition time delays (DT,DW)
0-10 minutes
Storage temperature
(-40˚C - 90˚C )
Operating temperature (ambient)
(-20˚C to 50˚C)

Technical Summary

Rating Range
Switch Dependent
Transfer Type
Application Dependent
Switch Type
Application Dependent
  • The Cat MX350 Controller for the CTE Series ATS
  • Status LEDS for:
    • Source 1 and 2 Availablity
    • Source 1 and 2 Connected
    • Transfer Inhibit
    • Active Alarms
    • Time Delay Active
  • Graphical Display:
    • Color graphical display with USB Calibration/programming port and Embedded Help
    • Displays 256 time-tagged events with 1 ms resolution
    • Provided detailed outage,test,and diagnostic reports
    • Monitors over/under frequency, voltage conditions, frequency imbalance, and phase rotation
  • Ranges of Controls / Metering:
    • Neutral, Engine Start, and Engine stop time delay timers
    • Contacts for Source 1 and Source 2 position indication as well as remote load test signals, and engine start delay
    • Synchroscope
    • Programmable generator exerciser
    • Source 1 and Source 2 In-phase monitor
  • Testing and Certification
    • Tested in accordance with:
      IEC 60068-2-30
      IEC 60068-2-1
      IEC 60068-2-2
      IEC 60255-22-1
      IEC 60255-22-2
      IEC 60255-22-3
      IEC 60255-22-4
      IEC 60255-22-5
      IEC 60255-22-6
      IEC 60255-25
      IEC 60529; IP54 (front),IP20(back)
      IEC 61000-4-11
    • Conforms to EN 60947-1, EN 60947-6-1, EN 60255-26 (EN 50263), EN 5502 / CISPR22 / EN 61000-6-2 / EN 61000-6-4
    • Quality System:
      Manufactured under an ISO 9001 Registered Program
  • MX350 Option Packages
  • Option Package A:
    • Full function ATS control with full sensing and control capabilities
    • Expanded diagnostics, high-speed 256 event capture, 365 days
    • Monitoring Software (local or remote), USB interface for uploading and downloading setup parameters
    • Four (4) programmable inputs and four (4) outputs assignable to additional ATS features
    • Full complement of programmable ATS control switches AUTO / MAN, Preferred Source selector,Commit / No Commit Xfer, Transition Mode Select for Closed Transition switch models)
  • Option Package B:
    • Includes Option Package A features, plus
    • Ten (10) customer programmable digital and ten (10)analog alarms.
    • Twenty (20) channel data logger, customer configurable sample period from one (1) cycle to sixty (60) minutes.
    • Waveform capture, ten (10) channels, up to 256 cycles each sixteen (16) samples / sec.
    • Auto Load Shed with voltage, frequency and kW triggers.
  • Option Package C:
    • Includes Option B features, plus
    • Four (4) additional inputs and outputs (totaling eight (8) in & eight (8) out)
  • Option Package D:
    • Includes Option Package C features, plus
    • Four (4) additional inputs and outputs (totaling twelve (12) in & twelve (12) out)
    • Customized user control logic
  • Option Package M:
    • Configuration for Manual Operation only (Non-Automatic)
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