MX250 Microprocessor Controller

Photos

Rating Range
Switch Dependent
Transfer Type
Application Dependent
Switch Type
Application Dependent
Undervoltage Dropout for Source 1 and Source 2
75-98% of nominal

Specs

Technical Summary

Rating Range
Switch Dependent
Transfer Type
Application Dependent
Switch Type
Application Dependent

Controller Specifications

Undervoltage Dropout for Source 1 and Source 2
75-98% of nominal
Undervoltage Restore for Source 1 and Source 2
85-100% of nominal
Underfrequency Dropout for Source 1 and Source 2
90-100% of nominal
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
(-30˚C - 75˚C ), -22˚F - 167˚F
Operating Temperature Ambient
40 - 400 amp molded shell (-20˚C to 65˚C) , -4˚F to 149˚F
40 - 4000 amp all others (-20˚C to 60˚C), -4˚F to 149˚F

Features

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.
  • 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.

Standard Equipment

  • Performance
    • 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
  • User Friendly Operation
    • Weather and tamper resistant touchpad
    • Through-the-door programming and display
    • Multipurpose display: LEDs for continuous monitoring of switch position and source availability; a four line by twenty character LCD display for settings, functions, programming and annunciation
    • Simplified keypad entry – menu-driven system is designed for ease of use
    • Built-in diagnosis with displays for ease of troubleshooting
  • Additional Features
    • User settings are unaffected by power outages
    • Built-in programmable exerciser uses separate microcontroller with independent battery back-up to serve as clock/calendar – battery failure will not affect switch operation
    • Built-in electrical operator protection
    • Inputs are optoisolated for high electrical immunity to transients and noise
    • Source connection and transfer data logging
    • Separate line voltage components for controller isolation
    • Watchdog circuit for microprocessor operation

Optional Equipment