motors

  1. D

    Rcd selection

    I am rewiring a 2 bedroom outhouse which I've been made aware will include a supply to a shed. I'm told the shed will we used as a work shop using equipment such as rotary grinders, motors, welding equipment and other power tools. I know welding equipment can produces supply distortion's a I.e...
  2. A

    Motors

    I know little about motors, but ive just been told by a guy that i used to work with that if one of the phases is down on a 3-phase motor, you can link it out to a working phase inside the motor and the motor will run at half speed... This dosent sound right to me but like i said ive not really...
  3. J

    3 Phase Motors Speed Control

    Hi, Does anybody know of any alternative to governing the speed of a 3 phase motor than a frequency inverter? Thanks in advance, Jamie
    • Jamie3032
    • Thread
    • 3 phase control frequency motor motors other phase speed
    • Replies: 32
    • Forum: UK Electrical Forum
  4. M

    overheating motors

    Can a motor overheat and short to earth if it is having to work to hard?There is no overload but the motor is protected by thermistors and a thermistor relay which cuts out on occasions. Its an intermittent fault but the Engineers that have watched the circuit say it trips the Main C/B. On a...
    • MatthewC
    • Thread
    • earth heating motor motors overheating protection short
    • Replies: 21
    • Forum: UK Electrical Forum
  5. I

    DC Motors

    Well expect many threads like this as i would like to know the in's and out's of them not just the crash course on what u need to know and pffff doesn't come up much so we won't go into detail. What would i like to know about them you may ask :P, well everything if possible within reason as i'm...
  6. S

    Display Cabinet Motors?

    Im after some replacement motors such as these -> Idea Showcases Motor , Display Cabinet Accessories Anyone know of any suppliers? Thanks
  7. O

    Practical differences between "Baker" testing and LEAP analysis?

    Does anyone have any experience with the validity of "Baker" Testing of a wound electrical device as opposed to LEAP anaysis? I have a conveyor magnet that is not going too well by the oil testing, and have been offered "Baker" testing by an NDT firm (can we use company names here?) but I have...
  8. J

    any motors experts on here

    hi guys currently doing some course work time served spark 4years. i have a theory question regarging squirrel cage motors and induction wound motor and the 2 differences in their construction, mabye im being blind in the notes but the answers i keep trying to pluck from them allways seem to...
  9. telectrix

    quick rule of thumb, 3 phase current

    now this is not exact, but comes close. say you have a 3 phase, 400v motor, given the kW, to get an approx. value for the current per phase, (can be done in your head), just multiply the kW x 1.5. e.g. a 20kW motor. I = 30A. ( not allowing for efficiency, pf etc. ) just to give a rough idea.
  10. W

    Anyone good with motors - for I, am poo

    Alright lads, As brief as i can - Screw auger dosing head, driven by a Carpanelli 0.37KW (1/2 HP) 3 phase 415V 1380max RPM induction motor . Under very little stress, is dosing a material into the feed heads, with a consistency of that of play doh or floury lard - soft and very pliable, can see...
  11. D

    3 Phase Motors & Control Gear

    I am wiring 3 3 phase motors, 1.1 KW each via 3 STOP/START manual starters. If one starter locks out for any reason, the others also need to close down simultaneously. I initially thought that I would have to have a relay in each starter connected in series but I've realised that won't achieve...
    • dldavies
    • Thread
    • 3 phase attach contactor control gear motors phase series start
    • Replies: 14
    • Forum: Commercial Electrical Advice
  12. beatboaby924y

    car trouble, anyone good with motors?

    Hi I have a 3 year old fiesta and sometimes when I turn the key to start the engine it doesn't start and makes a loud noise that sounds like the starter squeeling. The noise is similar to when you turn the key when the engine is already running and you get a loud squeel from the starter motor...
  13. K

    Voltage Optimisers.

    Has anyone come across a phase sequence fault when switching on a voltage optimiser for the first time. The system is a cheap chinese one I think with terrible instructions. Can a voltage optimiser know if your input wiring is black, grey, brown instead of Br, Bl, Gr? I ask because we don't...
    • kitlearie
    • Thread
    • motors optimisers phase rotation sequence voltage volts
    • Replies: 24
    • Forum: UK Electrical Forum
  14. T

    Two Three Phase motors on one Overload

    Hi All I have come across two 3 phase in line WOODS fans rated @ 0.22 kW / 0.6 amps connected together on one overload. This does not seem correct is there anyway this could be right ? Regards Tailspin :shocked::confused:
  15. B

    Any suggestions for a good book on motors, installation and maintenance?

    As the title suggests! Looking for a comprehensive book if you guys and girls have any suggestions! Thanks in advance.
  16. the pict

    a/c motors

    Anyone know a good book on ac motors nothing to mathematical or theoretical just the basics on motors and controls Pict
  17. S

    Motors and inverters for training.

    Evening all, This year i am going to bring my inherited workshop into the modern times. I am looking for any information about Motor Suppliers who may be able to supply me with some sort of Motor, and Inverter drive which i can use for training purposes. Does anyone know of any companies that...
    • SirKit Breaker
    • Thread
    • aus inverters motors roman times training
    • Replies: 7
    • Forum: Australia
  18. sythai

    Single phase to 3 phase conversion....?

    Hi Chaps, I have a customer who has brought a couple of 3 phase machines for for his workshop at home. But only has single phase coming in. Is there any sort of convertor that can be used to run these off the single phase ? Thank you, Sy
    • sythai
    • Thread
    • 3 phase aus conversion inverter motors phase single single phase three
    • Replies: 10
    • Forum: Australia
  19. R

    Scrap 3 Phase Motors

    I have a few knackered 3 phase motors in my garage, anyone know what the going rate per kilo is for them at the scrappers?
    • roukel01
    • Thread
    • 3 phase aluminium aus copper motors phase scrap thing
    • Replies: 6
    • Forum: Australia
  20. J

    am2

    wondering if anyone could please help a little.ive been on refresher course and dont think there should be any problems with installation, testing, or fault finding.My major concern is the multi choice exam of which i have the related topics.Would just like to know others experiences as am...
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