capacitors

capacitors

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  1. M

    Is anything special about motor start capacitors?

    My dishwasher was failing, and I quickly found the problem was a failing capacitor on the circulation pump. Marked as 2.5uF 400V. No problem, except not easily found locally. So I rummage around and find an old fluorescent lamp with a power-factor correction capacitor of the right value. Well...
  2. F

    Motor wiring help - single phase reversing

    I posted a month ago regarding a single phase motor + panel I have been given to try and sort following water damage to the panel. The assembly is a single phase 110v brick hoisting motor and so needs wiring to allow reversing. There is nothing to work back from as it was all disconnected but...
  3. James

    Motor capacitors

    I have been given a compressor motor and asked if I can make it work. It is missing its capacitors, anyone fancy guiding me through specifying the correct ones and how to wire them? Pretty please. P.s. it’s a favour for someone, if it was a chargeable job, it would be off to the rewind shop!
  4. dlt27

    Capacitors in motors

    Hi All, Had a farmer I’ve done some install work for call yesterday saying overload was tripping on his vac pump and could I get some new capacitors ( thought it would be simple enough as changing like for like). When I got there to have a look he said the guy who looks after parlour (...
  5. Pete999

    Capacitors and how they work

  6. C

    Need some advice. - 12V to 240V

    Hello! I've just joined the forum and am looking for a little advice. - As what I am attempting to do will never be attached to the electrical grid (and why this is relevant will be obvious in a second) it should bypass any laws around such. (and if it doesn't, I have a licensed mate who will...
  7. Tiny Spark

    Checking PFC capacitors.

    Hey guys, Hoping someone can point me in the right direction here. So I have aquired the responsibility of looking after the PFC units on site, Problem being nobody knows anything about testing the caps including me! So basicly they are 3 phase units with anywhere between 5 and 12 stages...
  8. D

    How dangerous are HV Capacitors in microwaves?

    Hello, I'm thinking of repairing my microwave but I've gotten a lot of advice that its unwise. I know HV capacitors can store lethal amounts of energy but what would happen if you were to touch it accidentally with the microwave running vs off?
  9. T

    Capacitors

    What size of capacitor should I use for a 125w single 8ft fluorescent fitting?is there an equation to work it out?
  10. D

    start and run Capacitors (again)

    Hello.After my last posts about wiring of the two caps on my metal buffing/pollishing machine its been working great doing sterling service nearly every day or a few hours on an off per day..until yesterday when I noticed it felt slightly underpowered.no overheating or burning smells...(just...
  11. the pict

    Capacitors

    I have installed a 3 Phase 12Kw twin tank fryer in a restuarant, nothing unusual there but, whilst I had the terminal cover off it was easier to undo the terminal bar and pull it out the way to get the cable into the stupidly small space attached in parallel to each phase terminals was a 0.6mf...
  12. O

    capacitors in light fittings

    guys, as i understand it, light fittings with magnetic type ballast (fluro, SON) have capacitors to correct power factor. What I dont fully get is why?? (other than correct power factor LOL) as I have seen fittings without them and they work perfectly fine. I've asked a couple of people and the...
  13. B

    Does anyone why power tools have small capacitors?

    i noticed while trying to repair a rotary hammer there's a small circuit board linked in with the switch with 2 5v capacitors (i think they're capacitors). are these used to give the motor a boost on starting?
  14. G

    Power Factor Correction Capacitors

    Hi, i am looking to correct the p.f. on a number of individual motors. I hope to use a small capacitor bank position locally to each motor. Can anyone recommend a brand/shop where I can get hold of these? Thanks,
  15. A

    PIR switching and use of capacitors

    Hi guys, looking for some help and advice and wondered if any of you guys can give me some which would be much appreciated. Im replacing switches in a stairwell in a block of flats for 2 wire PIR switches that dont need a neutral. I have replaced the switches that were simple push to make a...
  16. L

    Capacitors and uF values...

    Hi. I have taked out a Tesla capacitor control box from a lake, it had totally melted! The control panel is underated for the pump it controls. Anyway I can get the correct rating control box but the capacitor uF value is different. The original one is 35uF and the new one would be 60uF. Is...
  17. S

    selection of power capacitors

    Will someone give links(or charts) to download the sizes of power capacitors required for induction motors of various hp,rpm,design code for the purpose of a)reducing starting current b)power factor correction
  18. E

    Help with capacitors

    Hi guys. I am currently working in a large warehouse doing some investigating after originally doing an energy survey. When I first got here I isolated every submain but still got 30a on each phase. I originally thought someone was illegally tapping off but now think it could be something else...
  19. I

    capacitors Calc's

    Four capacitors of 5, 6,10, and 12 microfarads respectively are connected in series. What is the combined capacitance? Show your working The capacitances in the previous question are now connected in parallel. What is the combined capacitance? Show your working Any help would be...
  20. R

    capacitors

    how do i check to see if a capacitor has died?

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