phase | Page 6

phase

Recent contents View information Top users
  1. R

    ungrounded 3 phase systems

    hello. looking for advice on working on a 3 ph, 3 wire 480 delta that i believe fits the definition of a corner grounded delta. the title of the thread is appropriate because theres only 3 wires marked for each phase and no neutral going into the customers main disconnect switch which powers a...
  2. N

    3 Phase Inverter Motor Vibration But Not Spin

    Dear All, My tool Carousel crashed last night and when I tried to initialize the Carousel, the Motor just vibrating (shake hard) but not spin. I am not sure if Break, Encoder or Resolver cause the issue. Please advise. Thanks, David
  3. B

    2 Phase and neutral supply ??

    Hi All Question regarding 2 phase supplies. Came across this at a farm house, supply is in 3 phase and neutral to the main dist board, then from the 3 phase board at the farm house out to the garage is a 4 core SWA. They have taken 2 phases and neutral from a 63amp double pole MCB at the farm...
  4. D

    Three Phase Power supply

    Greetings I work for a client who has recently negotiated a bigger supply from the supply authority, the client has agreed with Scottish power to have a larger transformer and feeder cable installed, my part of the works is to upgrade the existing switchgear to accomodate for the new supply...
  5. N

    3 phase conversion on Car Ramp

    Hi All I am new on here and looking for some advice on converting a car ramp to single phase. This particular ramp is sold in 2 versions single or 3 phase. I bought a 2nd hand 3 phase version at very handy money so can justify a bit of spend on it. The 3 phase version i have has a 2.6KW 4 pole...
  6. P

    What is 3 phase bridge rectifier circuit?

    5 bridge rectifier circuit diagram ?????? 1. Three phase bridge rectifier circuit with resistive load 2. Rectifier circuit with RL load 3. Rectifier circuit with RLE Load 4. 3 phase rectifier bridge circuit using filter capacitor 5. Controlled rectifier circuit Link post...
  7. BiddeldyBwah

    Do 3 phase boards usually have RCD protection in commercial settings?

    Just sat contemplating life and realised i don't think i've ever seen any RCD protection on the boards we maintain/install at work. I've seen 300mA protection on some section boards but don't recall ever clocking a 30mA in a 3 phase board. Am i just not looking properly?
  8. BiddeldyBwah

    32a three phase isolator neutral bar?

    Came across one of these today at work. Had L1 L2 L3 and switched Neutral, but also had an N link bar inside. Just wondering what it's for?
  9. E

    Winding resistance tolerances in three phase motors

    Hi guys, Is there a standard tolerance percentage that should be followed when checking the winding resistance of each coil on a three phase electrical motor? The general rule of thumb I followed when measuring winding resistance was that each phase winding had to be identical or close to...
  10. N

    3 phase AC motor to a 120V speed controller

    I have a 3 phase AC motor that I have hooked up in low voltage it is supposed to connect to a 120v input 3phase 230v output speed controller I just don’t know how to hook it up. I think I have it right and will post some pictures down below but I would like to double check before I plug it in.
  11. Gunarosid

    3 phase power calculations.

    Dear all.. May be some body can help me to explain what happened with my generator set module. At my attach picture. According to S2 = P2 + Q2 is not correct. Can some body explain it.
  12. M

    Configuring motor to run off single phase?

    We have got a hydraulic motor/powerpack for leveling legs of a trailer. However this trailer is running off a 15KW inverter, so the motor needs to run off single phase. The motor has come configured for 3 phase, however the motor plate does say it will run off single phase. Would i be right in...
  13. C

    Any Idea why my single phase motor ans speed controller are not working

    HI Guys, I bought this motor and speed controller used and tried wiring as per the diagram on the side of the speed control unit but the motor will not turn on. I am running it at 220v, when plugged in I do see the green led light up. There is not much info on the internet. But I was able to...
  14. T

    3 phase motor reversing itself

    Hi I have a 3 phase 400v motor wired in star configuration it is controlled via a 3 pole 415v coil contactor which is switched simply via a stay put stop ... In for off Out for run.. ( Spanish design ) there is also a single phase fan connected between one phase and the star point of the motor...
  15. M

    how hot can be a single phase motor ?

    Hello! I have a high-pressure compressor equipped with a single phase motor! The motor have 2 capacitors, 1 continuous and 1 for starting, with a relay for isolation . The motor is old, but it's still working! I have changed the capacitors with new ones and the cable too. The motor work ok! I...
  16. wwilts

    DNO cutout for 1 dwelling with 3 fuses all on same phase

    Objective: allow fast charging of EV (22 KW) DNO cutout has 3 100A fuses, but all 3 turned out to be on the same single phase How to still obtain 22 kW for fast charging of EVs? Rotary phase converter? Switched on only when needed? Other approaches?
  17. HappyHippyDad

    When does 3 phase supply become 230V in domestic consumer unit?

    I went along this morning to quote for an EVCP install. I thought it was a domestic house but it was a B@B. It has a 3 phase supply. I always pass on commercial or 3 phase as it is outside of my remit. However, I am toying with the idea of fitting this EVCP IF I can fit it from a single phase...
  18. The apprentice

    Testing 3 phase (r1+r2)

    Hi there thanks for helping if you do, but was wondering on testing r1+r2 on a 3 phase distribution board could I link out L1,L2,L3 to earth and there for take all my reading that way ?
  19. S

    3phase surge suppressor connected to a single phase utility supply.

    I am using a 3 phase 4 wire surge suppressor on a single phase 240V mains. Is it still okay or will it have some back feed impact on the mains system?
  20. A

    How three phase is used as two phase here?!

    Hi everyone, I am having trouble in understanding following schematic. How only two phase are used for load and what happened to third phase here. TIA

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top