single phase

  1. D

    I need help with how inductance works in a single phase transformer

    I currently have this, Primary inductance on an AC transformer will determine the magnetizing current on the unit. Usually inductance is relatively high so the magnetizing current can be as equally low. This inductance can be seen as part of the magnetizing current; however, it will not be seen...
  2. H

    Can you use this 3 phase device on single phase

    Hi there I purchased goods to build a sauna back before Christmas and only now am I getting around to doing it. I was just looking at the heater controller and noticed they they’ve sold me a unit that says it is for a 3 phase/400v supply. I did make clear I only had single phase as many...
  3. F

    No isolation of Neutral in Single phase boards

    As title. Doing an EICR, have come across a couple of DBs, where the neutral goes straight onto the bar on Single phase boards. Whats your views on this guys? Should it have a requirement to be isolated? Is there a reg for? If so then it can be coded. My boss thinks its dangerous. I don't, but...
  4. A

    choosing cable voltage rating

    Hi, for a single phase LV installation, how do you determine whether to use 450V/750V or 0.6/1kV cable. Thanks
    • andrel
    • Thread
    • ausie elec cable installation phase rating single single phase voltage whether
    • Replies: 5
    • Forum: Australia
  5. I

    Single Phase 230V supply and 3ph Compressor install.

    Hi guys, Have an option of an old, but really solid superb condition and well made large +/- 200ltr compressor from Denmark. Rarely used since purchased/Build 1987. Only supply I have is 230V Sing/Ph. Never had any dealings with 3 Ph. First name plate. Grundfos 3~MOT MG90LAR-24F115 No...
  6. S

    Earth Fault at 240V Single Phase System

    Hi... I am Shamsul from Malaysia I have a question regarding to earth fault current if occur inside 240V single phase customer house/building 1.May explain how the earth fault current flow route 2.If got local earthing was connected from ground to 11kV 3phase DEAD line, is it the fault current...
  7. F

    VFD Single Phase in and out

    Hi there I preface this query with: I am an almost complete electrical novice. I need to control the speed, startup and slow down of a 2100W induction AC motor through a VFD. My workshop has ordinary Australian 240v single phase supply. I can find plenty of VFDs that convert single phase to 3...
  8. J

    Single phase supply

    If I have a 240/480 volt dual voltage single phase motor connected by 2.5mm 2c+e to an isolator and then just 1mm flex coming out with active, neutral and earth connected is it possible the power supply to be 480v or is it most definitely 240v
  9. robertl

    3 phase 2 speed motor from single phase

    Hello everyone I have just bought a new lathe, (used) its on its way to me from other end of the country now. I have only just realised i may have an issue. The machine is 3 phase and i was intending to go down the VFD route but because its a dual speed motor im not sure i can. See attached...
  10. C

    Single Phase AC MOTOR stuck

    I am trying to fix a single phase ac motor but need some help. When powered on and put off load, motor humms but doesnt rotate, its sort of magnetically locked because even trying to rotate by hand it very hard to turn (motor was removed from housing and therefore I have stator and rotor...
  11. D

    120/208 on single phase panel

    I’m replacing a timer based contact for a restaurants outdoor building lights, sign, and parking lot lights. The panel feeding the old timer contact equipment has a black phase, a red phase, a neutral and a ground. Each leg has 120 volts to neutral but has 208 volts between the two phases. Is...
  12. M

    how to make a single phase generator tns

    how to make a single phase generator tns
  13. S

    UK Large single phase motors in the UK

    Why is it that I could easily find a 10HP 220V single-phase motor for sale in the USA but in the UK I nobody has anything larger than 5HP?
  14. H

    208V Single phase wiring from 3 phase 4 wire disconnect

    I work in a location that was once a Machine shop showroom. We have 208/230/480 etc in the building. I need to install a temperature chamber that requires single phase only 208V or 230V supply. I have a 100 amp rated disconnect literally in the exact location this needs to go. I've read for...
  15. B

    220 Volt single phase Contactor relay controlled by 2 switches

    Hi, I am looking for help wiring a 220 Volt single phase Contactor relay that has a single A1 Coil terminal to be used with 2 float switches to control a pump. I know how to connect a single switch to the relay but unsure how to add the second switch. Each switch can be Normally open or...
  16. Dilwyn

    Can. I run 3 phase motor off single phase 4 wiresABC

    Can I run a 3 phase motor. Off single. Phase 3 Black wires ABC 1 earth wire. Any info. Would be great thank you.
  17. Joe9009

    Where to connect power cord to induction single phase motor 240v

    (I would want it to run clockwise) Any guidance would be much appreciated.
    • Joe9009
    • Thread
    • 240v ausie elec connect cord induction motor phase power single single phase where
    • Replies: 22
    • Forum: Australia
  18. D

    3Phase wiring into single phase supply

    I'm looking to install a traditional coffee machine which has total power 3300w and the wiring supplied with it is brown L1, black L2, grey L3 & Neutal with earth. How would this need to wired to operate on a single phase 16Amp supply?
  19. W

    Single phase motor reverse rotation

    Brook Crompton Parkinson single phase PD90S (from the 70s) 240v 11A 2850rpm 50hz I'm using it for polishing metal with a tapered spindle adapter and buffing wheels. I've got 2 questions. 1. (This photo was taken with all the wiring in its original position.) I've managed to...
  20. D

    3 phase to single phase with no VSD

    So basically I’ve got a 3 phase motor that I’d like to use to hook up to my cable stripping machine. The motor was salvaged from an old site and I know it works. I know the easiest way to connect it up to a single phase supply would be to use a VSD but those are expensive. I was wondering if...
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