delta

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  1. T

    Calculation of capacitor value for conversion from star to delta

    Hi does anyone have a notion of how to calculate the capacitance value for the above?
    • The Ghost
    • Thread
    • calculation capacitor conversion delta value
    • Replies: 30
    • Forum: UK Electrical Forum
  2. dlt27

    Motors and Star Delta Question

    Hi and thanks for any replies. I am predominantly an install electrician and don't have a lot of experience dealing with motors so any help would be greatly appreciated. I have been asked to connect a CNC machine, a dust extractor and a pump. The CNC is straight forward as it is just connected...
  3. 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?
  4. M

    How to on & off the dol or star delta motor with timer?

    Hey guys...... I am new to this forum. I looking for a solution since a week but i am not able to get it. I want to switch on & switch off the dol or star delta motor with timer (Please note: here i am not talking about a timer switch which is used to switch the motor from star to delta). I...
    • Mohammeed Aziz
    • Thread
    • delta dol how to motor off star delta timer
    • Replies: 22
    • Forum: The Welcome Forum
  5. J

    Help with 3 phase star delta motor

    Hi, I've been sent on a job to investigate a fan not working correctly. After investigation found that the fan doesn't run in 'Auto' or 'High speed' and just shows 'trip' on the control panel. The fan will run in low speed. I've replaced the belts on the fan as they were frayed. Opened the...
  6. Pete999

    One more Star Delta video for those still learning and for those who have forgoten

  7. S

    3ph star delta starter motor drawing high amps

    Star delta starter / motor problem. Starter starts runs as should on bench with no motor connected. Getting 230v to e on all 6 uvw 1s and uvw2. 415 u1 to v2 etc etc. But nothing 1 to 2s. As expected. When motor connected up. (Single speed) it takes 3a in start on all . Drops into run fine but...
    • Simon-0116
    • Thread
    • amps delta drawing motor star delta starter
    • Replies: 37
    • Forum: Electrician Forum
  8. A

    Question regarding 400V three phase lighting connected in Delta, without Neutral.

    I am in the process of designing the electrical installation of a community centre, and have a question about the provision of three phase lighting for a large function room containing 18 36W LED fittings. All of the light fittings are to be switched simultaneously. Would it be possible to...
    • AReynolds
    • Thread
    • connected delta lighting neutral phase question regarding three three phase without
    • Replies: 39
    • Forum: Commercial Electrical Advice
  9. K

    Star delta testing help needed

    Hi I need some help I haven't work on star delta motors since my 1st year apprenticeship. How do you test the motor from the panel i.e check that the windings are balanced? Any help much appreciated
    • Kj14
    • Thread
    • delta needed star delta testing
    • Replies: 32
    • Forum: Electrician Forum
  10. S

    Delta-Wye Transformers

    Hi Guys, I'm looking for some information or diagrams on Delta-Wye transformers. Most diagrams that I have got, give me information for 3 lines to a Delta configuration then on the secondary side you get the Star configuration. I am really happy with the above concept, I would like to...
    • saspm
    • Thread
    • attach delta phase secondary transformers
    • Replies: 6
    • Forum: The Welcome Forum
  11. G

    Dd0

    Where would a Dd0 transformer be used in the UK? Or an IT supply outside of medical for that matter?
  12. T

    Star Delta motor into DOL starter?

    Hello everyone. I have a new star delta pump (7 core flying lead) that has to be made off into a DOL single contactor starter. Is this possible and does anyone know how?
    • TomS
    • Thread
    • connect connected delta dol motor star delta starter together
    • Replies: 18
    • Forum: Electrician Forum
  13. E

    20 Kva Magnetek Jefferson 60Hz 3 Phase, 460y/260 Dry type transformer

    Hi. Have back fed this transformer trying to achieve 400 volts from a 250 volt 50Hz 3 phase 20Kva diesel powered generator. Have linked the high voltage Delta connected side to include all the windings, and connected the generator to the star connected low voltage windings, leaving the neutral...
    • emlyn
    • Thread
    • 3 phase connected delta kva phase transformer type voltage
    • Replies: 8
    • Forum: UK Electrical Forum
  14. UKMeterman

    HV phase lost, strange voltages on LV side

    Hi, Storme Katie dislodged one of the HV jumpers on the DNO 11 KV network, so the local 11KV 415 transformer was single phasing. I expected to get 240, or 120V but there were some people getting 150V and I got about 70 volts and it was indepenent of load. I am trying to work out why not 120V? Thanks
  15. C

    Star/ Delta Connections

    Hi guys, Anyone got any basic notes on star or delta connections that would help out to get my head around it and understand it a bit more haha. voltages, current and calculations? cheers
  16. L

    Star and delta phase voltages

    I came across a question today in my paper asking me to draw out star connection and a delta connection and draw out phase voltages on star from phase to phase and write in the voltage and I don't understand it at all can somebody help please. Star carrying 240/400v delta 400v Sorry I'm not...
    • Lee Gold
    • Thread
    • delta phase voltage voltages volts
    • Replies: 3
    • Forum: UK Electrical Forum
  17. I

    3 Phase presentation

    HiForum Thisall came about as I am looking to use a 3 phase motor with variablefrequency drive/VFD and started to get confused with 3 phasevoltage. MyVFD uses one phase and neutral on the input and presents 3 phases onthe output in Delta (no neutral). At first I though I could simulate400V 3...
  18. 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...
  19. S

    Star/delta motor trips on Delta

    Hi, I have a 90KW 3phase electrical motor. It is set up on the star/delta configuration for high current start ups. The problem comes when I start the motor. It is fine in star but when it switches into delta it will trip. It won't trip every time and when it does stay on it will run fine. But...
  20. T

    A strange fault and a interesting days fault finding....

    Ive had a amusing days fault finding today, Found several faults but have come out of it asking more questions than I have answers. So Me and a colleague go to this AHU that keeps tripping for unknown reasons, The pannel has been canabalised and the inverter and motors covers are removed but...
    • Tiny Spark
    • Thread
    • delta fault fault finding finding interesting inverter motor strange
    • Replies: 22
    • Forum: Commercial Electrical Advice

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