motors | Page 3

motors

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  1. i=p/u

    Starters and motors

    was looking at a motor the other day and when I measured across all I got was 230v to Earth but not 400v between.
  2. B

    Possibly fried circuitry, Need HELP!

    So I bought a pair of oster clippers from the states, took them to a guy who owns a hardware shop and asked what I needed he handed me a Us to Uk adapter and everything was fine. I used the clippers for maybe 5 weeks before they started cutting out when they were moved abit harshly, it gradually...
  3. uksparks

    Pumps and motors

    Hi, Ive got a good opportunity to do regular work for someone, well, a few times a month, connecting new pumps and motors, three phase stuff etc. Its a new area for me and looking for some pointers and basic information on where to start really, is there any good books or literature anywhere...
  4. R

    Multiple 3 phase motors fed via a JB supplied with a 27 core SWA

    Looking into a site today, just changing an isolator, i found multiple motors are supplied via a 27 core SWA cable. The motors are only 1-3kw and are supplied as follows... Main panel ---(27core SWA)----JB----(7core SWA)----Motor The 7 core includes an isolator signal for control purposes. I...
  5. A

    Electric Gate Motors

    Hi, can someone please help. I have replaced x2 Nice ME310 motors a year ago and all been working fine until recently. They seem now seem to fuse in a particular position or even sometimes in random positions. The connections to the motors and main junction box are dry so sure this is not the...
  6. B

    Setting overloads for three phase motors

    Hi just a question on setting the thermal overloads of a three phase motor. I have heard a few electricians state a few things regarding what it should be set at 1. Get operational current of motor and set it just above that reading 2. Set it at full load current of the motor 3.set it at 110% of...
  7. J

    Motors and Panel's, good practical book(s)?

    Hi, I am looking for a good book(s) on Motors and Panels, if anyone knows or has one that they would recommend :) Thanks
  8. S

    Book on motors

    I really need to get a good understanding of motors. From the basics to decent level. Anyone know of a good book(s)? or any good websites? Cheers
  9. C

    400v through a ring final circuit

    Hey guys, I had a callout the other day, 7 fan coil units where not working, these where supplied via a ring final circuit and once all unplugged the circuit engaged, I latter discovered all fan coil units had a dead link between line and earth under a 250v insulation test. The manager and...
  10. Simonslimline

    Another useful PDF (Motors)

    Found this PDF last night and posted it to a friend in another section on here. Thought i would post it up in here as well. Very good bit of revision material.:smile: http://www.ecollege.ie/site/liu/electrical_notes/LL241.pdf
  11. M

    tube motors

    Might be the wrong section if so sorry. I been to look at a tubulular motor which lifts up a bar hatch no labels or nothing on the old one. Now all the new motors are marked in newton metres any idea how to work out what weight they lift the main ones seem to be 80NM .......any ideas guys...
  12. P

    2 speed star delta motors

    Hi guys, would anyone have any info on 2 speed star delta motors the one I'm looking at has a selector switch on control panel for low speed this brings in one contactor when you rotate the switch from low speed through off position to high speed position it drops out the low speed contactor...
  13. A

    Anyone working on generators or motors in quarrys?? Starting new job need advice

    As title suggests im starting a new job Monday gaining experience working on generators and motors in quarrys, its a week long trial with a view to giving me a 6 months to a year long placement. Im just not sure what to expect, the guy has said theyve went through 20 apprentices in recent years...
  14. M

    Requirement of local isolators for 3 phase motors on plant

    Normally I fit local isolators adjacent to 3 phase motors to allow for maintenance. I have been informed that as my main control panel is within 8 meters at most from any one motor on the plant I can install a lockable emergency stop push button to kill the control circuit and use this as a...
  15. JD6400

    Electromagnetic effects , star / delta motor wiring ?

    I occasionally come across reasonably sized ( not for some of you , I know ! ) star delta motors that have been run in 2 x 3core swa . Now after looking in to this in the past , it has been suggested that as they tend to be only on motors up to 30kw or so , and as the loading per phase will be...
  16. K

    Starting 2 pole motors

    Hi, I'm a newbie here and I need help with starting some 2 pole 20KW motors, can I still use the normal 22KW DOL starters or is it better to upgrade the starters because of the larger starting current - any advice would be gratefully received, Thanks kjwudsph
  17. A

    3 phase contactor with overload

    Hi all, Could some one explain the correct way in connecting a 3phase contactor with overload protection. I have the supply going into l1, l2, l3 and motor connected to the load terminals, t1, t2, t3. I also have the 230v connected to the a1 coil and neutral on a2. Just a bit confused...
  18. Simonslimline

    Dc motors and generators

    Started doing motors etc at college so been looking online at vids, found this one which is interesting so thought i would post it up. DC MOTORS AND GENERATORS - YouTube
  19. W

    Motors over 0.375kw

    Am I right in thinking I saw a regulation that was that any motor over 0.375 kw had to be on a DOL starter?
  20. S

    Problem with LED GU10

    Hi, I've installed two LED GU10 lamps in a customers bathroom. They're on the same circuit as two fluorescent energy saving lamps already installed in the bathroom. So far, three LED lamps have blow (I replaced the first one, and now two have blown). Could the motors in the fluorescent lamps...

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