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  • Users: teco
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  1. teco

    2 Speed 1 Winding 3 Phase Motors

    ahr35181 it looks like the motors you have are dahadler tap wound constant torque. the leads should be marked u1 v1 w1 u2 v2 w2. for high speed supply w2-u2-v2 join together u1-v1-w1 for low speed supply u1-v1-w1 (others open) trust this will help. kind regds
  2. teco

    Condensation in motors

    pugap:- encapsulating the endwindings with dow corning 1890 paintable compound (when paintong windings also paint a coating on the inside frame) and fit sinted bronze pourous plugs to the lowest level of frame should help. kind regds
  3. teco

    Connection problem

    jammyjim:- dont know of any web site however samuel heller shows examples of this connection in his book multispeed and standard squirrel cage motors vol 1 single speed. ref "the offset T circiut" hope this helps kind regds
  4. teco

    Connection problem

    jammyjim :- sounds like you have a scott "t" connected motor. woods fan co use this type of motor for small aom fans. back coils are connected in series and the top winding connects to the center point of the back winding this forms a star point. hope this helps kind regds.
  5. teco

    Submersible Motor Winding Wire Supplier

    grover194 just recived this web site from one of our suppliers www.omerin.com give it a go good luck. kind regds
  6. teco

    Submersible Motor Winding Wire Supplier

    grover194. if you contact the local pleuger/mercury agent(distributor) and ask for a complete winding repair kit . in this kit you get winding wire slot insulation,phase insulation ,connection kit and banding tape. kind regds
  7. teco

    Fractional Slot Stator Windings ?

    edison123:- coil grouping a b c a b c a b c 4 5 5 5 5 4 5 4 5 :-repeat wind 12 groups 5 + 6 groups4. note:- unbalanced elect deg, connect series star only. also check rotor slotts for cusp or coging. cannot get a balanced winding for 6 pole (12.87 elect deg between slotts)config.have you...
  8. teco

    options for sealing shafts against water entry

    electricpete:- nylos make a very good labyrinth seal and is easy to fit (minimal machining req) we use them along with nsk ddu c3 bearings and water resistant nlgi2 type grease.loctite gasket illiminator is used on all spigots and mateing faces.this type of protection is to ip56.however for a in...
  9. teco

    LIQUID RESTISTANCE STARTER

    naglow :- we have tried to send fax but comes up wrong number . please check and advise ie country code. kind regds
  10. teco

    LIQUID RESTISTANCE STARTER

    naglow:-please advise fax # and we will send you a typical liquid mix procedure along with typical liqid rheostat characteristic curve. kind regds
  11. teco

    LIQUID RESTISTANCE STARTER

    sorry my mistake:-should have read we reccomend sodium carbonate. kind regds
  12. teco

    LIQUID RESTISTANCE STARTER

    naglo:- please advise :- do you have a characteristic curve for the liquid resistor? what is the full volume of water in the tank? what starting torque is required,and what is the internal resistance of the rotor circiut. would reccomend a sodium solution rather than salt. kind regds.
  13. teco

    We have in our NGL Plant, 3 explosi

    abuomar:-you could fit thermisters into the winding.these are embedded into the end windings (3# one in each phase) when rewinding or during manufacture of new machines. for a class "f" insulation system ptc130 should be used.thermistors moniter temprature rise with in the machine...
  14. teco

    VFD bearing failure

    lewish:- yes its becoming a big problem with newer vsd drives that do not have filters in the output.we have modified over 200 machines,it mainly occurs with drives and motors from 110 kw upward.normally you get a electrical discharge through the drive end bearing for close coupled machines or...
  15. teco

    Motor Space Heater Sizing Thumbrule

    electricpete:- we select space heaters on motor iec metric frame sizes, providing the relative humidity is not over 90%. eg:-d63/71 frame =10 watts, d80/90 frame= 20 watts,100/112 frame=30 watts,d132 frame=50watts d160 frame=60 watts, d180/200 frame= 80watts,d225/250 frame=100 watts,d280/315...
  16. teco

    DC-voltage losses over sliprings????

    parcifal:- try looking at the brush grade on the sliprings. had a simular problem and changed drush grade to a silver graphite type and this fixed the problem. kind regds.
  17. teco

    VFD and Motor Insulation Requirements

    lovison:- most motors today are wound with a class "f" insulation system with a class "b" temp rise (economics dictate this to be cost effective) , however the only time temperature rise should be taken into consideration with submersible pumps is when the water temp exceeds...
  18. teco

    lack of any seal at shaft on TENV motor

    electricpete:- we not familiar with the correct nema terminology. however you are correct in assuming "weather protected" "tefc")ipw44 should be ok for out door sevice, as the "w" stands for weather protection (bs 4999). we would suggest in future if you spec new or...
  19. teco

    Motor Vibration at 1/2 times line frequency

    electricpete:- try bently nevada at www.bently.com. they are really helpfull. kind regds.
  20. teco

    lack of any seal at shaft on TENV motor

    electricpete:- as a manufacturer most motors are produced to be "cost efective"as well as complying to bs nema iec specs. we regually make mods to machines to meet customer demands and specs (normally at no extra charge). in you case we think an over sight was made on initial...

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