motors | Page 7

motors

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  1. C

    Changing 3Phase Motors

    I maintain conveyor systems and we are always changing out motors, and I have been wondering if before we put ' back into service ' we should be taking some test readings and recording them . I have asked our managers and they reckon that because we are not adding to or changing the circuit that...
  2. M

    neutral on three phase motors

    please can anyon tell me do three phase motors have or have not got neutral, please if you can for star and delta thanks
  3. T

    Please Help - 3 water pumps running in parallel

    Hey Guys I am based in China and have 3 identical 60 meter 220v 1500 w water pumps supplying water up a hill of height about 120 meters and distance about 260 meters. They are currently connected in parallel but the problem is that they are all running at different speeds hence the water is not...
  4. C

    AM2 Tomorrow!!!

    Hi Ive completed my 2330 level2 tec certificate and nvq and lev 3 tec certificate. I have my am2 tomorow and really not feeling good about it as alot of the installation I dont work with I spend my day house bashing and testing never touched motors or mi. If I dont pass how does this leave...
  5. T

    3ph motors

    is it possible to get a 3ph motor rewound to single phase as i need same housing for apump:)
  6. C

    Motors and Generators

    Could anyone tell me where I might find a reference or guide for trouble shooting AC and DC motors and generators.I'm looking for some type of checklist. Someone told me that years ago they saw one that listed the most likely problem" if the motor is doing this, then these would be the most...
  7. R

    armature winders!!!

    Hello, could someone please tell me whether armature winders test the motors etc they wind or is the job merely involved with winding the coils.Im trying to establish whether they actually come into contact with electricity in the course of their job. Regards Ron
  8. R

    Electrician Winder-did they test motors?

    Hello, this is just a continuation of the question below,but did the remit of a Winder electrician include testing the motors once winding had taken place?Im a bit confused why a winder would be called an electrician if he was not actually working with electricity but just winding the coils...
  9. T

    star delta motors

    i have a panel with 2 no star delta pumps 39 kw 63 amps flc can anybody size cable for me length of run approx 100mts 1no pump is on standby but could start if pressure drops the cable has to be afire rated swa clipped to a tray running through an underground carpark the panel has 50 amp motor...
  10. S

    loop resistance & capacitance voltage transformers

    1. To measure loop resistance of small motors rated in KVA, we simply use a multimeter to get required results while for large motors/equipment rated in MVA we have to use a test set through which we apply some current & get the results. Why doesn't multimeter work there? 2. What is the...
  11. D

    Cable selection taking into account ''Startup Current''

    New to these forums an just finished my apprenticship.. Just have a quick question.. When selecting cable for small commercial fan motors do you have to take into account the startup current? The motors usually are around 9.8A FLC and sometimes have a startup of around 30-35A. Do i need to...

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