Two speed one winding motor troubleshooting advice

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kwired said:
:thumbsup::thumbsup:I see 460 volt rated motors that see input of 490 to 500 volts all the time. They are designed to be able to take that.
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Yes those motors you are talking about are designed that way. But OP's motor? May not be so, IMO. To prove that, first tell me your comments about post#49.
 
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mivey said:
Suppose the motor is designed per required standards to give satisfactory performance at 460 +/- 10%. Do you expect a non-damaged motor to be saturated at 476 volts?
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You are talking about big size induction motor, while I compact size motor for the same HP. As for OP motor big size or compact size? I think compact size.
 
Sahib said:
You are talking about big size induction motor, while I compact size motor for the same HP. As for OP motor big size or compact size? I think compact size.
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It behaves differently to other motors the OP has on his site doing the same job. Indeed, he calls it a problem motor.
 
Sahib said:
You are talking about big size induction motor, while I compact size motor for the same HP. As for OP motor big size or compact size? I think compact size.
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What is compact motor, other then one with 1.0 instead of 1.25 SF or one with external cooling, or a blower motor that is only rated for use within the airstream it creates?

Wind it with aluminum instead of copper you might make it lighter, but it should need to be bigger:huh:
 
kwired said:
What is compact motor, other then one with 1.0 instead of 1.25 SF or one with external cooling, or a blower motor that is only rated for use within the airstream it creates?

Wind it with aluminum instead of copper you might make it lighter, but it should need to be bigger:huh:
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If the motors on the plant are all the same for the same application, it is the performance differences observed that need to be considered.
 
Besoeker said:
If the motors on the plant are all the same for the same application, it is the performance differences observed that need to be considered.
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I agree, now we have another variable that really shouldn't matter - compact motors??

I thought all of the motors and driven loads in question are supposedly the same thing, one performs differently even though it has same load and same input voltage as the others, I think even a non electrician will agree the motor in question has something wrong with it.
 
kwired said:
I agree, now we have another variable that really shouldn't matter - compact motors??

I thought all of the motors and driven loads in question are supposedly the same thing, one performs differently even though it has same load and same input voltage as the others, I think even a non electrician will agree the motor in question has something wrong with it.
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Yes, It would seem so, but that's what is being disputed by some here.
 
kwired said:
I agree, now we have another variable that really shouldn't matter - compact motors??

I thought all of the motors and driven loads in question are supposedly the same thing, one performs differently even though it has same load and same input voltage as the others, I think even a non electrician will agree the motor in question has something wrong with it.
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Perhaps we need a graphic entitled "which of these is not like the others?".
 
MTW said:
Susan must of really made an impression, for you to remember that...

MTW
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They sang that song in so many different scenes it sort of sticks in your head to some degree. Even nearly 50 years after first hearing it.

I like the two headed monster though:cool:
 
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