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    • Relays
    • 50R-400-ALT
  • Littelfuse-Symcom 50R-400-ALT Alternating Sequencing Relay
  • Littelfuse-Symcom 50R-400-ALT Alternating Sequencing Relay

    50R-400-ALT

    Symcom / Littelfuse

    MSRP:
    Now: $244.27
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    Technical Help

    Product Description

    Description: Alternating Relay/380-480V/surface

          Product Information       Resources
    ManufacturerLittelfuse - Symcom
    Product Category Relays
    Product Sub Category Alternating Sequencing Relay
    Series50R-400-ALT Series
     
      Download Datasheet
          Specifications
    Product Attribute
    Attribute Value
    Input Voltage (V)432 - 528 Vac
    Input Current Range (A)0.04
    Input Impedance (Ohms)1000000
    Output Load Rating (VA)Pilot Duty: 470 VA @ 600 Vac; General Purpose: 10 A
    Debounce Time Delay (s)1
    Termination Type7 in.-lbs. 12 - 18 AWG
    Mounting Method#8 screws
    Dimensions2.93 H x 5.27 W x 2.95 D in. (74.4 x 133.9 x 74.9 mm)
          Series Features
    50R-400-ALT - 480 V ac application, panel mount
    Series Description: The 50R-400-ALT alternating relays are used to alternate between two loads, most commonly in duplex pumping and compressor applications to balance the runtime of both loads.

    When used in single float applications, the alternating relay changes state after the float switch opens*, forcing the other pump to run the next time the float closes. When used in dual float applications, the alternating relay will allow both pumps to run simultaneously when the lead and lag floats are both closed.

    An adjustment knob provides the option to force one pump to run every time the float switch is closed. This is helpful when one pump has been removed for repair or for test purposes.

    A built-in debounce feature prevents the alternating relay from changing state if the float contact bounces momentarily.
    • Debounce time delay: Prevents rapid cycling caused by waves or splashing in the tank
    • LED indicators: Visual indication of load operation in duplex application
    • Built-in manual switch to force load operation: Helpful to control load operation when performing periodic maintenance or pump repair
    • Operates from 380–480 V ac: No transformer required to provide 120–240 V for control circuit

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