phase

  1. N

    Bode Plots: Phase Angle is asymptotic to -180. What is the gain margin?

    What would be my gain margin if my phase angle doesn't cross -180? Thanks in advance
  2. B

    PAT Testing 3 phase to 13amp adapter leads

    Hi Hope anyone can help Can someone give me advice on how to connect up a 3 phase to 13amp adaptor lead for carrying out PAT testing on 3 phase equipment but using a 13amp port on the PAT tester. Need to know the connections for 4 pin 3phase & earth plug to 13amp plug 5 pin 3phase &...
  3. mikeatron

    single phase motor reversing itself

    evening all ive got a single phase AC fan motor running normally however occasionally on start up it starts in reverse. i have 4 no fans, and this is happening to 2 occasionally. now these are in a fresh air chambers and i was starting to think that the airs blowing over the fans causing reverse...
  4. Peter55

    Earthing question - three phase into main building, then single phase to EV charger

    Hi there, new to the forum and in final stages of completing C&G level 3; need to complete design project to complete. Am struggling to get my head around how to draw up correct circuit diagram showing EF Loop path for EV charger where initial supply is described as 'three phase TNCS' feeding to...
  5. D

    Where do you test from in phase rotation test on am2

    About to re sit testing section of am2. Am I required to test phase rotation at the incoming switch and also the 3 phase socket and motor. Just can't seem to find any clear instructions on what they expect on this test
  6. B

    Need to convert 3 phase 480 60 hertz to European 3 phase 330 50 Hertz

    Hi , I have a customer that has purchased a machine from Turkey. The machine requires 3 phase 330 volts at 50 hertz. I have access to 3 phase 460 at 60 hertz here at the plant in the US. I can find a transformer for the voltage but that doesn't change it from 60 hz to 50 hz. Im looking at 90...
  7. N

    Bringing single phase off three phase board

    Hi all, new to this thread and just looking for some views. I have today attended a industrial unit which is being converted into small individual offices. An electrician has previously been here and has taken 3 individual sub mains from the existing three phase consumer unit to single consumer...
  8. i=p/u

    Single phase motor humming and heating up.

    Hi, morning EF. I was looking at a single phase motor yesterday attached to hydraulic pump for cardboard bailing machine that seems to be temerpemental with stop and starting and making humming sound. I checked the contactor was working first and voltage was going to motor, I clamped the cable...
  9. R

    3 phase sub main…help please??

    Hi All I’m in a bit of a quandary at work and need a couple of things clearing up if poss. I’m the maintenance manager/spark/fitter/skivvy/everything else that needs doing man 🙄 in a plastics factory and I’ve got to provide a supply for a new machine. The current set up is a 90mm SWA protected...
  10. W

    Proteus 3 phase DB horizontal

    Have any of yous fitted the proteus 4 way 3 phase DB? The horizontal one. The din rail I got with it was very narrow, only the top off of the RCBO clipped onto it. Anyone else had this?
  11. P

    Looking for an easy-to-understand explanation of 3 phase / 3 phase + N

    I have some questions about 3 phase. 1. Does the neutral come in with the supply as standard? 2. As most 3 phase equipment doesn't require an N, what are the circumstances where you need one? 3. When we do need one, why do we need one? 4. Am i right in presuming therefore that we'd mostly use...
  12. C

    Split Phase and Smart Meter

    Hi we have a split phase supply and had a EDMI ES-30B 3 phase meter fitted. Our readings are extraordinarily high. It is an old farmhouse but there is just myself and my wife and we are using 29,565 kWh per year. 81 kWh per day. We just have an electric shower, electric cooker, appliance like...
  13. ozgyrex

    3 phase lead-in minimum gauge

    Hi guys, We're starting a build in Queensland of an all electric house and will have some pretty large loads so we're hooking up a 3-phase supply. Some of the large loads include a 22kW 3 phase electric vehicle charger, 3 phase ducted A/C, heat pump pool heater, heat pump HWS, induction cooktop...
    • ozgyrex
    • Thread
    • 3 phase ausie elec gauge minimum phase
    • Replies: 2
    • Forum: Australia
  14. t01474

    3 phase EV headache!!

    Evening everybody. It’s been a while since I’ve asked for the collective brains advice but this one has really got me stumped. I’ve been asked to install a twin outlet 22kW EV charger at an office. Unfortunately the office is an old doctors surgery (3 storey ex-house, basement , pitched roof...
  15. HappyHippyDad

    Installing a 3 phase rapid EV charger?

    A bit of an embarrassing question. I have a regular customer who I enjoy working for. He has asked me to install an EV rapid charger for his avant loader (electric tractor type thing). I always turn down 3 phase jobs as I don't feel I understand it fully, but I'd like to do this job. I believe...
  16. J

    3 phase board with 250A incomer

    Hi guys, if a 3 phase board is to be installed, with 250A mains. With 8 32A 3 phase sockets, 8 single phase 16A sockets, 2 light circuits and 3 phase 63A socket on it, that exceeds the 250A. I understand you would have to consider diversity factor etc into it but is that still too much or would...
  17. D

    3 phase isolator switch

    can I use the above isolator switch with single phase 240V wiring. live neutral and earth? its the right designed switch for me and also it is the right current rating.
  18. newfutile

    Strange IR readings on 3 phase board

    I am unable to take global IR readings on a 3 phase consumer unit, i have disconnected the neutral but when i try to measure the meter never settles and eventually times out. i have tried 2 meter/s with same results
  19. B

    single phase to 3 phase

    I have a single phase system that uses 320 amps and 240 volts and I rewire the circuits for 3 phase what size generator would I need and how many amps on each leg
  20. W

    3 phase conversion to 110 in residential USA

    Moved into remote residential site in USA , devestated 3 years ago by tornado that took house, family and all buildings, poles etc. except well building and barn (where I am living for now) only remaining service is a 3 phase that went to well. For about 6-10 months I need to survive here till I...

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