three phase

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  1. D

    Can you use a single phase motor to create three phase power.

    This might sound like a stupid question so apologies in advance. So I had a random thought in my head. So I was wondering if I was to use a single phase motor to spin a three phase generator to create three phase power, would you be able to create more power then the single phase motor is...
    • David345
    • Thread
    • create electricity energy energy efficiency generator motor phase power power generation renewable renewable energy single single phase three three phase
    • Replies: 15
    • Forum: UK Electrical Forum
  2. J

    UK Three phase (No neutral ) EFLI testing on an RCBO

    Hi I have a MFT1553 Mega tester. Is there a feature on the tester to test 3phase RCBOs when there’s no neutral present? Pretty sure mot. Was wondering if i could temporarily connect a neutral on a Wander lead and use the three wire test method? Thanks John
  3. J

    UK Standardising on site to TP & N Sockets rather than TP and no N

    Hi I have a site where they have some sockets fed via Three Phase and Neutral and others TP with no N. Rather than both types of sockets for both types of appliances, was looking at 'standardising' and upgrading all plugs to TP and N. And where the appliance did not need a N, it would be left...
  4. O

    UK Single or Three Phase Identification (Vehicle Lift Content)

    Good morning all, I’m afraid that I’ve come here looking for some advice with a problem I have with some vehicle lifts that I have been asked to dispose of. I have listed them for sale, but I am not sure how to determine whether they have single, or three phase motors. I am now aware that any...
  5. V

    three phase board separation

    hello everyone, I have a little problem. I've got a three phase board, it has the three phase sauna, one phase lighting and sockets connected to it. The problem i am facing right now. This is a comercial unit. So the problem is that the sauna makes the RCD trip every so often. And the board...
  6. U

    How can I connect a three phase manuel change.

    I want to do connection for three different power source in my house. Community solar, Personal solar, and a Generator. They are all single phase. Please help me how to connect it in a three phase change over.
  7. CokeCanBrad

    UK Three phase testing PFC

    am i correct in thinking for determining the PFC, you can do a PEFC test aand PSCC test and which ever one is highest you can double and choose to be your PFC also is it true for 3 phase that PSCC Is usually always higher? Ive seen some people croc on to the earth and croc onto the neutral and...
  8. N

    types of earthing to be carried out for 3 phase standby generator which is separately driven system

    3 phase standby generator of rating 30KVA is to be install in the lightning prone area. The utility main line is TT arrangement where neutral point is grounded with 3 phase and neutral wire provided to load system. A separately driven generator ( standby generator) is also needd with TT...
  9. R

    UK Three Phase wired machine ohms law calculation

    I have a machine which is wired as 3 phase neutral and earth and is 15.1KW, there are no 415v components and all components are 230v, so effectively it is using 3 single phase circuits, however I have always carried out the circuit breaker calculation based on the 415V potential, I.E> 15120W...
  10. S

    Workshop Q light gauge 220v can a 3 phase 415v connection be made up?

    Hello again and Happy NY all. I have decided to take a small piece of family land and erect a house ( live for a few years) As part of this, i have to do a lot myself, joinery carpentry etc. I have access to a rural farm workshop to conduct all, its dry but the electrical connection is run...
  11. R

    Three phase or single for new installation?

    Hi all, I've just registered to seek a bit of advice and am sure I'll be looking for lots more help soon. I've just bought a plot of land near Hastings that I'll be building a workshop on for personal hobby use - there's no other building on site. I'll be doing some welding as well as having my...
  12. S

    what do these 380v wiring colours mean, I want to use with a 220v vfd. it may have had speed control

    Hello, I am a woodworker who has got a large old power feed, its 380v and i want someone to rewire to a 220v vfd for me, can someone please tell me what these old colour codes mean. I bought the machine in Scotland.I can't find any easy diagrams online.I think its a good few years old.Thank you...
  13. naylorpd

    OWL Intuition - worth the bother?

    I have a three phase supply in my house in Azerbaijan. The incoming cable from the meter is 4x35mm SWA with a 120A DNO breaker, CU is a Schneider Acti 9 and I have earth rods buried in the garden. I did all the electrical work myself apart from first fix cables in the house, in about 2014...
  14. gazdkw82

    Three phase polarity test

    I have my AM2s coming up and i am a little confused to the live polarity test on a 3 phase circuit. It's the first live test and I dont want to fail on what is a simple test. I know how to perform a live polarity test on a single phase circuit but unsure on the procesure for 3 phase. Is it just...
  15. A

    UK 2armours supplies dist board

    Hi, wondering if anyone has seen this before. At a job today and the supply to the 3 phase dust board is 2x16mm armours. One has three phases in it the other armour has the neutral and earth. Bit rough I think is there any regs on this ? Any help would be great.
  16. D

    Two post carlift single to three phase

    Has anyone had any history of powering a three phase motor from a single phase supply? Is there a preferred/best way of doing this? i.e.single phase to three phase inverter/VVFD, convertor or using capacitors etc. Not my usual avenue, but I have had the question put to me, so I am trying to get...
  17. M

    Using one phase of three phase supply, will rcd work properly?

    I have a property abroad that has just been given a new supply by my local electrician . It has gone from six mm2 single phase supply to 10 mm2 three-phase supply it has a three-phase RCD unit and currently is only using one of three phases The other phases will come into use when the...
    • mikeytgw
    • Thread
    • electrical work phase properly rcd supply three three phase using
    • Replies: 4
    • Forum: The Welcome Forum
  18. S

    Three phase INDUSTRIAL fuse board recommendation

    Hello I have a small industrial unit with a messy distribution board. It has 100A breaker and around 10 circuits (lights, sockets, air compressor, three phase 16A fuse etc....) Can you recommend a quality new board from Schneider Havell or Hager?
  19. B

    Earthing of Three phase Motor

    Hi recently was on a job carrying out EX inspections on three phase motor at a pharmaceutical plant. The supply cable going to the motors does not have a core for the earth they have used the braid/SWA of the cable for earthing. So entering the three phase motor with EXe cable glands terminating...
  20. SJD

    Single to three phase converter

    One of my customers has a single phase to three phase converter, to power a 3-phase pump. The converter is a rotary type, quite noisy, and recently has been prone to breaking down (three times so far this year). So they are looking for a static or "digital" converter replacement, 230V to 400V...

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