OLD 1/3 HP MOTOR RUN CAPACITOR

Discussion in 'General Electronics Chat' started by macke, Feb 5, 2016.

  1. macke

    Thread Starter Member

    Oct 12, 2014
    65
    2
    Hi I have an old motor marked as THE BRITISH THOMSON HOUSTON CO LTD RUGBY ENGLAND CAPACITOR MOTOR TYPE BKC 2412
    It is 240v 1/3 HP. Unfortunately the rubber insulation on the wires to the capacitor have disintegrated leaving the two leads bare. As it is a sealed metal cap I cannot rewire it. There is nothing written on the cap so how can I determine a replacement value?

    MACKE
     
  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,789
    945
    It is not critical that the value be exact. Close will work.

    See pages 8 and 9 to start with.
     
  3. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
    2,785
    1,233
    Is the capacitor defective? -- If the problem is merely the lead insulation, you may measure the capactance (with, for instance, an LCR indicator) the working EMF rating will likely = 330V)

    Best regards
    HP
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,546
    2,370
    An old BTH 1/3hp I would guess it would be around 2μ to 5μ.
    Max.
     
  5. macke

    Thread Starter Member

    Oct 12, 2014
    65
    2
    Thank you most informative
    Macke
     
  6. macke

    Thread Starter Member

    Oct 12, 2014
    65
    2
    Hi I think it's defective
    Macke
     
  7. macke

    Thread Starter Member

    Oct 12, 2014
    65
    2
    Hi I'll give it a go at 4uF
    Macke
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,546
    2,370
    I may have spoke in haste, I checked my old motor reference tome and it could be 10μf -20μf.
    Sorry about that.
    Max.
     
Loading...