Replacing 8uf capacitor on electric gates

Discussion in 'General Electronics Chat' started by oldebulldog, Dec 28, 2009.

  1. oldebulldog

    Thread Starter New Member

    Dec 28, 2009
    1
    0
    I have just moved into a house with electric gates and one wasn't opening properly. The previous owner said I needed to change the capacitor.

    I could only get one from Maplins which has 4 connectors on the top, the original was prewired with 2 (blue and brown wires).

    Can I use this 4 pole, if so, how would I wire it up?

    Thanks
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    Do you have a link to the specs of the new capacitor?
    Are the pins marked?

    Greetings,
    Bertus
     
  3. VoodooMojo

    Active Member

    Nov 28, 2009
    503
    53
  4. Sam Braidley

    New Member

    Jan 19, 2010
    1
    0
    You can discharge a capacitor by taking an insulated screwdriver and putting the blade against the metal of the cabinet and the contacts of the capacitor. Make sure the power to the unit is off first. Also, sometimes you can see of a capacitor is open by looking at the top, terminal end, it will bulge out where normally it is flat or concave.
    If you were able to get the motor turning last night and it didn't may any grinding or whining noises, it may be good. Excessive attempt's to get it going using a defective capacitor will overheat the windings of the motor and eventually short the motor.
    The capacitor ratings should be 5 or 7.5 Mfd/370V depending on the specific motor.

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