phase

  1. L

    discharge higher than 3kw with ac coupled 3 phase

    hi guys i'm trying to get my head round the following setup growatt TL3 5kW 3 phase string inverter 14 panels @ 395W Spa3000 TL ac coupled controller - unless there is a alternative mcs approved one available growatt ark 4x2.5's with bms will i be able to draw 3 5 or 8kw with this setup please...
  2. M

    What can happen to 220v Devices if I connect a 110V phase to both wires

    Ok, i am new in this forum I am looking for some enlightenment. Today I got a call from my boss, which is now in Venezuela and he is connecting a 4000W 100v power plant at his condo. The electrician he found there connected a 2 Throw Switch Knife to the circuit to split the power coming from the...
  3. D

    3 phase run of 1300 feet

    Hello all. I am trying to get 125 amps 3 phase back to a paintball field to power an electric air compressor. I have a 3 phase 120/240v PG and E feed, 200A panel about 1300' feet away from the desired location. I have 2 transformers, so we can transform up to 480 to make the 1300' run, and...
  4. S

    Powering single phase motor from 3 phases

    Hi, this might be an easy question, but i need to power a single phase motor situated about 300 meters away from my MCC. Do I just run 3 phases 415VAC cable to the motor in the field and just connect one live phase and the neutral to get the 240VAC? if that's the case then what do I need to do...
  5. timhoward

    Compact 3 phase distribution?

    I may be seeking the holy grail here, but does anyone have any instant thoughts for a compact 3 phase distribution board that doesn't cost the earth? I only need 1 outgoing 3 phase distribution circuit and 1 single phase final circuit, with an 100ma RCD main switch. This is all outdoors with...
  6. E

    Purpose of 110V 3 phase?

    Hi, I have taken over a design engineering job for industry. The design is using a 400V/110V transformer. Usually, the 110V is single phase. However, in this case it is giving 110V 3 phase 32A. The 110v 3 phase is for use with 4P 110V socket to run a pump. Being in the UK, I am used to...
  7. Y

    3 phase generator help

    Iv been asked to wire a separator (portable to go to different farms and separate water from slurry) to a 3phase 40 kva generator. The separator has 3 motors 11hp, 5.5 hp and 3hp. The 11hp motor kept tripping the gennys mcb so a previous spark fitted an adaptable box with contactors so it now...
  8. K

    Load calculations on three phase board

    Costumer have 12 flats and need to feed for each flat a prepaid meter and consumer unit within the flat , the main supply to building is three phase , my question is how to distribute the load for 12 flats, each flat have a load of 63A. Main supply is three phase .
  9. 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...
  10. 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
  11. 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...
  12. 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...
  13. 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...
  14. 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?
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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.
  20. 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
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