star delta

star delta

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  1. G

    Star delta issue (driving me insane)

    Heeelp! I have an 11kW/21A motor which is attached to a hydraulic power pack. I have replaced the old panels with new, using the same star delta starting. When connected to a 415V outlet protected by a C32 breaker, the breaker will periodically trip. This has only manifested since the new...
  2. mxj262

    Star Delta Starter 400KW Crane Motor

    Hello Dear friends, I am going to check a start delta starter for a motor(400KW) which is used for crane and lately it has been causing some issues (Voltage Drop) not sure if the voltage drop is always there once this is started or it goes back to normal this information was not provided. Will...
  3. U

    Star delta Pump motor - Doesn't work clockwise but Works anticlockwise

    Hi I'm having a problem with a 20 HP pump motor from a hydraulic press to try molds. When we energized the machine, it starts with star correctly but when it changes to delta, pump motor stops. The breaker doesn't strip and fuses were ok. Video (clockwise rotation)...
  4. S

    Star Delta Starter, Blowing Contactor

    Hi there, I got a call to a job, table saw (wood) tripping C/B straight away. 4kW motor on Star Delta Starter. So I get to the job, after some investigation I find that the main contactor is welded shut and there is a phase to phase short circuit, I find that the motor tails to the windings...
  5. T

    Control Panel Star Delta Starter

    Hello all. I’m after a bit of advice. Daft question I’m sure but when wiring a star delta starter in a panel is it necessary to use the electrical interlocks, i.e for the coil of the delta contactor, would you take the wire through the N/C of the Star contactor first?
  6. G

    Star delta fan wiring help please

    Hello there have been asked to fault find on a clients 3 phase star delta fain in a grain store. the client purchased the fan second hand and I have power across the contractors but no power on the out going side. no wiring diagrams either. Can anybody give me some in what to check for and...
  7. M

    star delta

    Hello folks I have been asked to wire a star delta motor auger feeder ,it is in a farm yard and the customer has asked for it to be wired via a waterproof plug and socket , so that it can be put out of the way during winter,etc.has any one a steer on how people get around the issues of doing...
  8. S

    Star delta starters

    I have some stock that I'm trying to get rid off, due to customers changing their minds as well as materials being wrongly specked for some jobs. I'll give some examples of some of the equipment and if anyone is interested they can e mail me for a full list and photos. 4-20 signal isolators...
  9. Brightspark2

    Star Delta Starter, Remote stop start

    I have a star delta starter that I'm wiring a remote start stop too. Now there is a spare 3 wire swa cable running from next to the starter to the location that the remote start stop is needed. My question is can I use a 3 wire start stop on this star delta starter, as I see it its not possible...
  10. Amp David

    Star Delta Starter

    Can anyone advise of a good reliable supplier off star delta starters please. Local places don't do this sort of stuff and not driving miles to somewhere that will, so online is preferred. Thanks for suggestions.
  11. C

    Star Delta Theory

    Hi All. Firstly would like to say thanks to everyone who reads this and provides any useful information. I have used the search button and have read through previous posts/ stickys before posting this. Basically I would like to understand the voltages clearer in star and delta, I know...
  12. L

    Which source drive the star delta contactor

    Hi sorry for my newbie question, I've a question about a star delta starter. What exactly drive the mechanical contact in contactor, is't AC 240/220V separate source from L1,L2,L3? thanks.
  13. W

    How to know whether to wire as star or delta?

    Hi All, When connecting a motor, how do you know whether it needs to be wired as star or delta? Thanks
  14. S

    Help with a 3 phase star delta motor

    I have been called out to replace a DOL starter that somebody fitted last year, It controls a 3 phase motor on an extraction unit. The customer has said that the fan used to start slow and then after 10 secounds it would speed up to full speed. The electrician that changed the starter replaced...
  15. E

    How to 'size' contactors for star delta circuit ?

    Hi All , How do i size the main , star and delta contactors for a motor control circuit using a 50Kw motor ? Do i just rate all contactors at 50 kW ? Any help appreciated. Thanks :)
  16. E

    Anyone got a detailed control wiring circuit for star delta ?

    As above , has anyone got a good drawing for a star delta control circuit wiring (just the control wiring) that is easy to understand and wire directly from ?:)
  17. D

    star delta starter

    Hi. There is a 60 amp 3 phase supply and a company has said they will to put in a star delta motor starter (55kw) which will run a gear box(55kw) that needs to be tested i do not know if the gearbox runs at 55kw continuosly , is this possible or would it be better to run a new supply? thanks
  18. R

    Star delta motor help

    Right guys, apologies in advance for lack of detail etc but I've only had a very brief look at this one today and I'm expected to work miracles tomoro. A three phase 13kw motor for an AHU extract fan was running very noisy and they sent it away to be refurbd It has come back and been put back...
  19. G

    star and star delta help!

    hi, this is my first post on the site, i am currently studying c& g 2330 and we have reached the star and star delta section of the course. for whatever reason i am struggling to get my head around the subject and was hoping someone could shed some light on it as simply as possible. any help...
  20. M

    Star Delta connections regarding motors

    Hope someone can help, Basically i'm just getting into heavy industrial and when i have been opening various panel's and motors i can't get my head around the actual terminating of star,delta from the panel to the motor as they seem to move L1,L2,L3 to L2,L3,L1. Any ideas?

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