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  1. #1
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    Default DELTA mode wiring

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    RAY..... question for you or the erudite sparkies on this forum

    I've been measuring with my multimeter , the GE motor from the Hendey lathe

    As far as I have worked out , this is the way it is wired up .

    So in order to connect for 220V Delta, I connect leads A and C together , with B forming the opposite terminal .

    MIKE

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  3. #2
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    Default

    Hi Mike,

    No, that's not it... I'm not sure where you got that idea from... actually it makes me a bit uneasy, (makes me a bit hesitant to give any advice),
    In fact I'd strongly recommend that you should get an electrician in to help out. It's not the sort of thing that will give you a second chance...





    The purple wires are the ones I've added..... but again... go get yourself an electrician... please!

    Regards
    Ray

    EDIT: Sorry if that came across a bit strong, but I don't want to see you electrocute yourself...

  4. #3
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    Default Ok

    OK thanks

    Don't worry

    I wont kill myself .........

    I know this stuff is highly dangerous , thats why I asked somebody who has the knowledge before doing anything ..

    MIKE

  5. #4
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    What does the motor say on the data plate?, do you have a pic of the plate as it would go a long way towards working out what sort of motor it is.

  6. #5
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    Hi morrisman,
    I have attached a couple of pdf's, one on Motor Terminal Markings that show the arrangement of windings in squirrel-cage motors and a pdf on different methods of Motor Start Circuits.
    I hope these pdf's will give you an idea on the winding arrangements and star/delta connections so you are better informened when looking at Motor Windings.

    Regards,
    Keith.

  7. #6
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    Default Wrong info

    Hmm

    I came across this as I was researching

    The old Hendey motor is a dual voltage 220/440 V DELTA mode motor with 9 wires coming out

    This diagram explains where the connections go for high/low Voltage

    So what Ray marked on my diagram isnt correct ????

    Or am I wrong again ...MIKE

  8. #7
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    Default

    Does your plate say it's delta 220V?, you can also have a dual voltage nine wire motor connected in star mode as well, a picture of your motor's data plate would help in sorting out what you have. With a dual voltage motor, Star or Delta they will both run off a 240V inverter when set to 220V.

  9. #8
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    Hi Mike,
    It will be interesting to see what Ray has to say. But are you sure that diagram isnt wiring for high and low speed rather than 240V/415V?

    Stuart

  10. #9
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    Default Delta

    Quote Originally Posted by Graziano View Post
    Does your plate say it's delta 220V?, you can also have a dual voltage nine wire motor connected in star mode as well, a picture of your motor's data plate would help in sorting out what you have. With a dual voltage motor, Star or Delta they will both run off a 240V inverter when set to 220V.
    Hi

    It's definately wired in DELTA mode ... I always thought this motor is in OK condition as the winding resistance readings indicate that .

    The people at the motor place it town didnt have a clue .... thay said its burnt out , typical rubbish you get from a business these days.

    I wired it up as per Ray's directions but it didn't work. Now I see I should have it wired as per that diagram i attached .

    Anyway , I have a new motor on the way, so this is a academic discussion ....MIKE

  11. #10
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    Quote Originally Posted by Stustoys View Post
    Hi Mike,
    It will be interesting to see what Ray has to say. But are you sure that diagram isnt wiring for high and low speed rather than 240V/415V?

    Stuart
    Because the chart is labelled with a voltage column and not a speed column?. At any rate it's fruitless to speculate without more info on the motor specification.

  12. #11
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    lol
    I was just looking at the "high low" and thought it was a strange way to word it.

  13. #12
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    Default pic

    hi Graz

    This pic may help.

    Volts 220 / 440

    Amps 9.15 / 4.58

  14. #13
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    Default

    Stu: yeah I think i've pulled a few worse ones than that on this forum, I have a tendency not to read all the postings on a topic before verbally shooting from the hip.

    Morrisman: Yeah it's a bit hard to tell from the label plate other than the fact that it's a dual voltage motor 440/220V. If it was a 9 wire star connected type then you'd find three wires would have been connected according to the multimeter all with the same resistance and then three sets of two wires all with half the resistance of the three wire ones.........this doesn't agree with your first drawing you made.

    Your first post drawing electrically resembles that chart and diagram in post No6 you just have the triangle corners in the wrong place. If you make the mid points 'B' in your first diagram of the windings as the corners and then number them 1,2,3 etc. you'll have a perfect match...........so yeah that post No6 diagram would work for your motor. If you wired it the suggested way Ray has in post No2 then the current flowing in one half of the windings would cancel the magnetic field in the second winding resulting in a lot of buzzing but no rotation and then overcurrent trip which is what did happen?.

    A quick rewire test would be to leave it connected as Ray suggested but this time hook the three phases of the inverter to the B points on your diagram, not the A+C connections (still leave the A connected to it's nearest C) you should get rotation this time but you'll still be feeding 240 into a 440 winding so it's only good for a temporary test.

  15. #14
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    Default

    Quote Originally Posted by morrisman View Post
    Hi

    I wired it up as per Ray's directions but it didn't work. Now I see I should have it wired as per that diagram i attached .
    Hi Mike,

    The way I drew was for the high voltage 440V and if you followed that and the motor was ok it would have run fine, just not full power however, the diagram shows how to wire it for 220.

    Just because a motor tests ok with a multimeter doesn't mean it's good, you need a megger to test properly.

    The place you took it to, are they a motor rewinder?

    Regards
    Ray

  16. #15
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    Default Ok

    Quote Originally Posted by Graziano View Post
    Stu: yeah I think i've pulled a few worse ones than that on this forum, I have a tendency not to read all the postings on a topic before verbally shooting from the hip.

    Morrisman: Yeah it's a bit hard to tell from the label plate other than the fact that it's a dual voltage motor 440/220V. If it was a 9 wire star connected type then you'd find three wires would have been connected according to the multimeter all with the same resistance and then three sets of two wires all with half the resistance of the three wire ones.........this doesn't agree with your first drawing you made.

    Your first post drawing electrically resembles that chart and diagram in post No6 you just have the triangle corners in the wrong place. If you make the mid points 'B' in your first diagram of the windings as the corners and then number them 1,2,3 etc. you'll have a perfect match...........so yeah that post No6 diagram would work for your motor. If you wired it the suggested way Ray has in post No2 then the current flowing in one half of the windings would cancel the magnetic field in the second winding resulting in a lot of buzzing but no rotation and then overcurrent trip which is what did happen?.

    A quick rewire test would be to leave it connected as Ray suggested but this time hook the three phases of the inverter to the B points on your diagram, not the A+C connections (still leave the A connected to it's nearest C) you should get rotation this time but you'll still be feeding 240 into a 440 winding so it's only good for a temporary test.
    That is exactly what happened Graz - a buzzing sound , but no rotation . Thanks for clearing that up

    Mike

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