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Contactor with auxillary contacts

  1. Jan 25, 2010 #1

    i want to make automatic on/off the 3 phase pump with float switch and 3 phase contactor(with auxillary contacts) for my tank.

    i have,
    1. contactor with auxillary contacts(3 phase contactor , a1,a2 coil voltage 220volts, no and nc)
    2. Float switch(single phase)
    3. with this i want to put Manual On/Off switch for pump(no , nc)

    i want the connection details, can anyone help?
  2. jcsd
  3. Jan 25, 2010 #2


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    Last edited by a moderator: Apr 24, 2017
  4. Jan 26, 2010 #3
    Please refer to attached page and following descriptions.

    F1: Fuses
    Q11:Contactor or automatic star-delta starter
    F2: Overload relay with reclosing lockout
    F8: Float switch 1-pole (circuit: pump full)
    S1: Changeover switch (MANUAL-OFF-AUTO)
    F9: Float switch 1-pole (circuit: pump full)
    M1: Pump motor a Cable with float, counterweight, pulleys and clamps
    b :Storage tank
    c: Pressure pipe
    d :Centrifugal (or reciprocating) pump
    e :Outlet
    f :Suction pipe with filter
    g: Water-failure monitoring by means of a float switch
    h: Well

    Creative thinking is enjoyable, Then think about your surrounding things and other thought products. http://electrical-riddles.com

    Attached Files:

    • pump.GIF
      File size:
      14.5 KB
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