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Anonymous Poster #1

Star Connected Motor

10/23/2011 6:30 AM

What will happen if one of the winding of star connected motor is interchanged ? Means starting end and end end interchanged of one winding.
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Ali18
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Join Date: May 2008
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#1

Re: Star connected motor

10/23/2011 6:55 AM

HI Dear

as far as I got from your question" if we reversed a starting terminal into an ending one in the motor in question"... which will result in a change in the poles number of of that star-connected motor,this in turn will lead the motor to draw higher amperage than normal..which is undesirable ...............

Hope this helps.

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Anonymous Poster #1
#2
In reply to #1

Re: Star connected motor

10/23/2011 9:37 AM

Dear Ali , This will be correct. But i want know about the electrical displacement between the phases . Also the direction of phases ,resultant flux ,emf. If above information is known then we will get some clue.
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TonyS
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#3
In reply to #2

Re: Star connected motor

10/23/2011 9:45 AM

Time to get your textbooks out or look on Google. This is not a homework site!

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Anonymous Poster #1
#4
In reply to #3

Re: Star connected motor

10/23/2011 9:59 AM

I know it , but this is challanging question.
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TonyS
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#5
In reply to #4

Re: Star connected motor

10/23/2011 10:10 AM

It's to be hoped you rise to the challenge then.

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Anilborate198
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Join Date: Oct 2011
Location: India Maharashtra
Posts: 5
#6
In reply to #5

Re: Star connected motor

10/23/2011 2:03 PM

If you know answer then give answer. Otherwise shut your mouth.

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Tornado
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Location: Richland, WA, USA
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#7
In reply to #6

Re: Star connected motor

10/23/2011 4:28 PM

You have worn out your welcome here. Please leave.

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electricalexpert65
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Join Date: Oct 2009
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#8
In reply to #6

Re: Star connected motor

10/23/2011 9:18 PM

If you shut everybody's mouth, how will you get an answer? You are being too crude. If all the CR4 members decide not to answer your questions anymorte, what will you do. Plesae tender an apology immediately.
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Anilborate198
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Join Date: Oct 2011
Location: India Maharashtra
Posts: 5
#10
In reply to #8

Re: Star connected motor

10/24/2011 12:33 PM

Hay dear , you can see his post . What he says for my post . So thats why i have answered to him in this language .

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Nando37
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Join Date: Oct 2011
Location: DALLAS, USA
Posts: 22
#12
In reply to #1

Re: Star connected motor

10/29/2011 12:05 PM

Ali18:

You have said :

which will result in a change in the poles number of of that star-connected motor,this in turn will lead the motor to draw higher amperage than normal..which is undesirable ...............

~~~~~~~~~~~~~

Could you kindly clear up this statement -- specially when the motor or generator has been stablished with their phases mechanically defined by placing the coils of each phase in the proper winding slots . !!!

And the connections are externally done!!
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PWSlack
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#9

Re: Star Connected Motor

10/24/2011 6:49 AM

If it has been installed correctly, the overcurrent protection device will operate, thereby disconnecting it from all power sources.

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Nando37
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Join Date: Oct 2011
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#11

Re: Star Connected Motor

10/29/2011 11:58 AM

You need to think a bit.

The best way is to draw the 3 phases waveforms as normally drawn, on one phase with different color draw an additional waveform 180 degrees offset, then just for good point of view draw STAR connection and the DELTA ( WYE) connection and draw the wave forms connected to each of both connection types, then draw one with different color and of course 180 degrees offset and see the voltage changes for the STAR and the DELTA.

See that You have 3 drawings one the sine waveforms normally drawn then the additional waveform with another color drawn on top of the one changed.

Go to the Star connection and add the voltages versus phase angle

Go to the DELTA connection and add the voltages versus phase angle.

Then do the voltage addition of both connections with correct wave form and compare.

Instead of telling you what is happening -- if you do this home work you can exactly see what is happening to the 3 phase -- one phase reversal problem

Nando
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Anilborate198
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Join Date: Oct 2011
Location: India Maharashtra
Posts: 5
#13
In reply to #11

Re: Star Connected Motor

11/02/2011 10:23 AM

Ok NANDO , i think this information will help me in better way. Thanks for feedback .

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Users who posted comments:

Ali18 (1); Anilborate198 (3); Anonymous Poster (2); electricalexpert65 (1); Nando37 (2); PWSlack (1); TonyS (2); Tornado (1)

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