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The MX250 microprocessor is standard with the entire CTS product family. The MX250 Series includes all the standard features of the MX150 Controller while offering expanded programmability and field adaptability. The high reliability and ease of unattended operation makes it ideal to use in a wide range of mission critical applications.

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Technical Summary
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Rating Range Switch Dependent Switch Dependent
Transfer Type Application Dependent Application Dependent
Switch Type Application Dependent Application Dependent

Features and Benefits

  • Available to support ALL transfer modes:
    –Open, Delayed and Closed Transition
  • User-friendly programmable engine exerciser,with or without load, at ANY interval in a one-year period
  • A wide variety of operating voltages available in a single controller for most domestic and international applications
  • Real-time display of ATS status, including active timer(s)
  • Multiple levels of user-defined password protection
  • Serial communications allowing connectivity with other ATS's, Caterpillar® Switchgear, and SCADA systems
  • Time-tested synchronous logic automatically measures phase angle and frequency allowing disturbance-free transfer
  • Unsurpassed statistical ATS/System monitoring available in real-time
  • Elevator pre-signal contacts automatically bypassed if the selected source fails, minimizing time an elevator is without power
  • Universal Motor Disconnect (UMD) sends a pre-signal, post-signal or both to any motor control center. Not bypassed in an outage,the UMD ensures safety in the event of a single phase loss
  • Voltage unbalance detection standard
  • Also includes all standard MX150 features
  • Back-lit/temperature compensated LCD display (includes the display of source voltage and frequency, exercise time, delay options and source condition)
  • Close differential 3-phase under-voltage sensing of source 1, factory standard setting 90% pickup, 80% dropout; under-frequency sensing of source 1 factory setting 95% pickup;voltage and frequency sensing of source 2,factory standard setting 90% pickup voltage,95% pickup frequency.
    All factory settings are operator adjustable.
  • LED indicators for ATS position and source availability
  • Plant exerciser clock (configured for 1, 7, 14 or 28 day run selections)
  • Built-in time delays with count-down display
  • Push button to bypass time delay transfer/retransfer
  • Transfer/commit/no commit selection In-phase monitor
  • Event logging (last 16 events)
  • A test is standard (fast test/load/no load) to simulate source 1 failure – automatically bypassed should source 2 fail.

MX250 Microprocessor Controller Standard Equipment

Performance
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  • ESD immunity test per EN61000-4-2 Class B(Level 4)
  • Electrical fast transient/burst immunity test perEN61000-4-4
  • Conducted and Radiated Emissions per EN55022Class B (CISPR11) (Exceeds EN55011 & MILSTD461 Class 3)
  • Voltage dips and interruption immunity EN61000-4-11
  • Conducted immunity test per EN61000-4-6(ENV50141)
  • Ringing wave immunity per IEEE 472(ANSIC37.90A)
  • Surge immunity test per EN61000-4-5 IEEE C62.41
  • UL, CSA and IEC listed
  • Radiated RF, electromagnetic field immunitytest per EN61000-4-3 (ENV50140) 10v/m