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    • 201-575-AU-OT
  • Littelfuse-Symcom 201-575-AU-OT Voltage Monitor Relays
  • Littelfuse-Symcom 201-575-AU-OT Voltage Monitor Relays

    201-575-AU-OT

    Symcom / Littelfuse

    MSRP:
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    Technical Help

    Product Description

    Description: 3-Ph Plug-in VM/475-600V/adj. VUB, TD & RD/ w/skt

          Product Information       Resources
    ManufacturerLittelfuse - Symcom
    Product Category Monitors
    Product Sub Category Voltage Monitor Relays
    Series201A-AU Series
     
      Download Datasheet
          Specifications
    Product Attribute
    Attribute Value
    Input Voltage (V)475 - 600 Vac
    Maximum Input Power5
    Input AC Line Frequency (Hz)50 / 60
    Output FormForm C
    Output Load Rating (VA)Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac
    Restart Delay RangeManual; 1 - 500 s adjustable
    Trip Delay RangeUnder/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed
    Trip Point Accuracy (%)±1%
    Overvoltage Trip Voltage (%)1.1
    Overvoltage Reset Voltage (%)1.07
    Undervoltage Trip Voltage0.9
    Undervoltage Reset Voltage (%)0.93
    Voltage Unbalance Trip Point (%)2 - 8% adjustable
    Voltage Unbalance Reset (%)Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%)
    Mounting MethodDIN rail or surface mount (plug into OT08-PC socket)
    Operating Temperature-40° to 70°C (-40° to 158°F)
    Storage Temperature (F/C)-40° to 80°C (-40° to 176°F)
    Humidity10 - 95% non-condensing per IEC 68-2-3
    Dimensions1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)
          Series Features
    201A-AU Series - 3-Phase Voltage/Phase Monitor
    Series Description: The 201A-AU series is a three-phase, auto-ranging, dual-range voltage monitor that protects 190–480 V ac, 50/60 Hz motors regardless of their size. This monitor provides a user-selectable nominal voltage setpoint and will automatically select between the 200 V and 400 V range. Additional adjustment knobs allow the user to set a 1–30 second trip delay, a manual restart or 1–500 second restart delay, and a 2–8% voltage unbalance trip point. It includes advanced, single LED diagnostics where color and light patterns distinguish between faults and normal conditions. This unique microcontroller- based voltage and phase-sensing unit constantly monitors the three-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels for a specified restart delay time (or manual reset).
    Series Applications: Fan motors, Air conditioners, Compressors, Heat, well, and sump pumps, Small conveyer motors
    • Proprietary microcontroller-based circuitry: Constant monitoring of loss of any phase, low-voltage, high-voltage, voltage unbalance, phase reversal, harmful power line conditions
    • Auto-sensing wide voltage range: Automatically senses system voltage between 190–480 V ac. Saves setup time
    • Advanced LED diagnostics: Quick visual indicator for cause of trip
    • Compact design for 8-pin; DIN-rail or surface mount: Allows flexibility in panel installation
    • Adjustable voltage unbalance trip setting: Allows compatibility with a variety of motors and reduces nuisance tripping
    • Adjustable trip and restart delay settings: Prevents nuisance tripping due to rapidly fluctuating power line conditions.

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