capacitor burn out

Discussion in 'Electrical Forum discussion & Blog' started by dragnuts, Oct 20, 2009.

  1. dragnuts

    dragnuts New Member

    Messages:
    5
    Location:
    australia
    have just put in new bore pump (grundfos 1.5kw) and new control box. Ran for 20 minutes then noticed fluid dripping out of control box.one of the 2 capacitors was hot so i stopped pump but will not start again so i replaced the capacitor and it done the same thing.What would cause this?
  2. Lakee911

    Lakee911 I&C Engineer (mostly WWTP)

    Messages:
    1,328
    Location:
    Columbus, OH
    If the pump is brand new and the control box is brand new, then most likely you have something wired incorrectly.

    Rather than trying to fix brand-new equipment, I would have contacted the manufacturer(s) immediately if equipment self-destructed when energized.

    Can you tell us how it's wired?
  3. dragnuts

    dragnuts New Member

    Messages:
    5
    Location:
    australia
    motor is single phase 3wire 1.5 kw 240v. not sure what you mean by how it is wired? thanks
  4. Billy_Bob

    Billy_Bob In the Trades

    Messages:
    422
    It is common with electronics for one thing to be bad and cause another component to fail.

    If alternating current gets through to an electrolytic capacitor, the capacitor will fail for example. The circuit should only allow DC to get through to these types of capacitors.

    I would send it back. They are going to need factory schematics and an oscilloscope to "see" what is going on with the circuit.
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