phase

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  1. X

    UK 3 Phase Motor Star/ Delta phase conversion

    Hi Guys, We have a CNC router which uses single phase for the spindle, stepper motors and control box. This is all wired in and working correctly. However, the CNC also features a vacuum bed, powered by a seperate 3 phase motor. We have no 3 phase in our shop, the motor is labeled as 4kW...
  2. O

    Wylex 3 phase board fitting.

    Do I need any more than this to fit the above board, does it need a fitting kit for the switch or anything extra to get it up and running (tails excluded obviously)
  3. T

    Wiring 3 Phase/Single Phase Hob

    Hi, searched the forum but cant locate anything similar so apologies if ive missed something. Ive got a new hob to install in the kitchen (Cookology CIH602). Ive got a dual cooker connection plate with the oven already connected and intend to connect this. Looking at the manual, it can be...
  4. Aegir01

    Hooking up a bandsaw from single phase

    Hello all, I signed up here for a little help. I bought a 3 phase bandsaw and went down the rabbit hole of VFD’s etc. ‘The motor is 3 phase 400v and I have 1 phase 240v (Australia) . So I bought a VFD that has an input of 240v single and an output 400v three. It’s currently in the post. I...
  5. W

    Home Lathe with 3 Phase inverter tripping mains

    Hello - hope someone can advise please. I have a recently purchased second hand Myford lathe which has a 3-phase inverter (Siemens Micromaster 410) Lathe all works fine but regularly trips my RCCB 80A 30mA breaker taking out half of the board - usually when first powering on. The inverter is...
  6. T

    Lost Neutral on 3 Phase system - how do you calculate the effect on line voltage

    I know the effect of a lost neutral (floating neutral) on a 3 phase system, and the theory of why the line voltages can vary. However, I have been attempting to show this by calculating the line voltages of a phase system at given loads on each phase. Lets say:- Red 296 Amps, Yellow 279 Amps...
  7. S

    80A / 100A single phase whole home energy monitoring with website / app graphics

    I'm trying to find a way of energy logging a home to help plan a battery installation. Ideally tracking import by hour and displaying some information and graphs on an online platform like the myenergi app allows when you have some of their equipment. Thought I could buy just a harvi and CT...
  8. S

    1ph to 3 phase inverter

    I have been asked if I can wire a motor for a car lifter in a domestic garage, however the motor is 3 phase and only single phase is available in the property. Is it possible to use a single phase to 3 phase inverter to power this motor? I will attach photos of the motor and its output.
  9. D

    Three phase circuit breaker - Utilising only one phase

    I have a scenario where there is a three phase DB in a commercial property where there are mixture of three phase and single phase washing machines. All the washing machines including those that are single phase have triple pole MCBs installed and wired in 5-core to 16A rotary isolator. from...
    • daavvee
    • Thread
    • breaker circuit circuit breaker machine phase three three phase
    • Replies: 2
    • Forum: UK Electrical Forum
  10. will_505

    3 phase motor running backwards wire colours

    Hi all. Yesterday I wired in my 3 phase compressor to run off our 53kva generator. I just need to know which colour cable is for which phase as I'm not sure. Cables I've got are: brown, blue, black and green/yellow. I've currently got brown wired into live 1, blue into live 2, black into live 3...
  11. O

    Best 3 phase board and a question

    What are people fitting in the 3 phase range just lately, I've had a scan at various makes and it seems to be a ---- up between Hager and Wylex at the minute, both are / were decent makes and the RCBO's are reasonably price, things like Merlin are way too dear for the RCBO's. Also am I right in...
  12. A

    G100 Export Limitation - Multiple Single Phase Arrays - Three Phase Net / Vector Metering Limitation

    Hi I have three phase installed recently to increase generation. DNO approved the extra 2 solar arrays so we have 3.68KW FIT on one phase and 8KW on phase 2 with 6KW on phase 3 We are coming to the end of the install and my question is as the DNO have limited export to zero how do we share the...
  13. puntloos

    3 phase, Automatic Transfer Switch for Solar/Generator - EPS

    For power outages, my solar inverter (+battery) is able to take on the entire house load - as long as I unplug my collection of vintage kettles. ;) - this is called EPS mode - Emergency Power Supply. Needs to carry grid (3 phase, 69A/phase) or solar inverter (3ph, only 7000W max) TL;DR: Can...
  14. H

    RCD without neutral 2 phase supply

    Hi everyone, Quick question can you fit an RCD without any neutral connections? If I have a 3 pole circuit breaker which has all 3 poles terminated with a 3 phase supply (L,L,L excluding neutral or earth) on the primary side and I am using only 2 phases on the secondary side (L,L) to create a...
  15. S

    Single phase and 3 phase supply to same equipment

    I have a single phase stainless steel pasteuriser that has two control boxes attached to it. One box houses the control for the electronics and motor for the mixing paddle. The other box houses the supply to the water jacket immersion heater. The immersion heater is 1.5kw single phase and is...
  16. MJS123

    Single Phase Transfer Switch in 3ph Distribution

    When there exists a single-phase transfer switch within a 3-phase distribution system, is it necessary for both feeds to the transfer switch to be connected to the same phase on the two sources? Take for example the image below, note that the transfer switches are connected to the power sources...
  17. Shaun-

    3 Phase Metering Question

    Good morning, So I’m working on an existing 3 phase solar system and the customer wants a way to use the huge mass of exported solar on their pool. So currently looking at possibly using MyEnergi Eddi’s or something similar to power a 3 phase heater element (probably split into 3 single...
  18. K

    How do you calculate the tollerances from a 3 phase winding measurement

    Assuming that you measure the windings for a power transformer, for example: A-B: 2,258 ohms B-C: 2,262 ohms A-C: 2,250 ohms, how do you calculate the tolerances for these? What formula do you use? You consider as reference the highest or the lowest value from every 2 readings? I just wanna...
  19. H

    3 phase 400v supply to 2 phase supply

    Hi I have a question hoping I can get some help. I wanted to know if there is a 400V 3 phase supply (A/A/A) terminated on the primary side of a TMD breaker can you take 2 phases from the secondary side of the breaker (A/A) to create a 400V supply only excluding E/N and use to power up your...
  20. M

    American Phase Colours

    Hi, Looking for advise on industrial phase colours.

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