phase

  1. 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...
  2. A

    3 phase

    Hi everyone i have recently had a 3 phase supply and board install in a domestic house, this will supply the house which has 12 circuits for light ring mains and ac units etc as well as in the future a 3 phase workshop, single phase workshop, 2 x 1 bed lodges, hot tub, solar panels and electric...
  3. F

    Lost a phase.

    So today, I get a phone call from one of the bosses customers. No power or lights in workshop. (3 phase DB feeds single phase DB). Says the lights flicker on when 3 phase compressor tries to run. My guess over phone was a lost phase, or neutral problem The boss went out later and confirmed my...
  4. 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...
  5. robertl

    UK 3 phase inverter welder from Split Phase / Bi Phase supply 480v

    Hello all, I have discussed my power install before as i am sure a lot of you will remember as it is quite different to a normal setup. I have a split phase / Bi Phase system, 2 phases coming into the workshop from a center tapped transformer. 240v phase to neutral and 480 phase to phase. I have...
  6. A

    Megger 3 phase motor with thermistor

    Hi guys Do you carry out an insulation resistance test on a 3 phase motor with thermistor protection as you would without thermistor protection or does extra caution or process need carrying out differently? First time coming across one Thanks
  7. M

    Convert 3 phase into 3 single phases

    Hi there, I have currently started working on a farm and they are having a new 100a 3 phase supply installed. This is being terminated in an external enclosure. They then want to carry this 3 phase 150 meters to a barn and at this point split it into 3 single phase supplies. Is this even...
  8. L

    Sizing 3 phase Generator

    Hi Everyone May be someone could shed some insight on the sizing and provide some suggestions: 3 phase Generators (400 V, 50 Hz) have the ability to sustain 250% kVA of its rated kVA at 30% voltage dip. Suppose a machine needs to be powered by a standby generator during a power outage. It...
  9. 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
  10. Gavin John Hyde

    3 phase looped service cut out

    Got a customer with a 3 phase looped cut out. Only use one of the phases and there is likely a second fuse on the adjacent holder/phase. I have asked the DNO to take a look and advise as the customer wants an EV charger. With a looped supply you should get dnos advise first. ENA guidance also...

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