4160vmotor 1

[amper]

can we install a 3 phase 4160v motor on 4000v source without problems any comments welcome

 

[Kiribanda]

amper,

The opposite is possible.

Question please.

it looks like a NEMA motor. If it so,does the name plate say that motor rated voltage is 4160 V or 4000 V?

 

[jraef]

Generally, motor designs have a +-10% tolerance, but generallyyou see it the other way around; a motor will be designed for 4000V and connected to a 4160V source, because the lower design voltage makes allowances for some additional voltage drop when you have a long distance from the controller and the motor. If your motor is truly designed for 4160V and you truly have only a 4000V supply, then it might be OK, but you will have very little tolerance for any additional voltage drop.

So the real answer is; it depends on other factors. The best people to ask will be the motor mfr., and give them ALL of the information, i.e. motor lead length, conductor size etc.


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> faq731-376

 

[jmomic]

It depends of the load. If your load requires 100% of the motor capacity connecting on lower voltage will pull higher than rated current. If you do not require full capacity you should not have any problem with lower voltage.

 

[TurbineGen]

This motor is a 4160V/ 60 Hz I assume? Is you supply also 60 Hz or is it 50 Hz?

------------------------------------------------------------------------
If it is broken, fix it. If it isn't broken, I'll soon fix that.

 

[amper]

the original motor is a old hitachi unimag nema 4000v 60 hz 32,,, ampe 250ho coupling with a gould pumps 3600model 610 api .

 

[jraef]

So then was your original post a dyslexic error and you have a 4000V motor and a 4160V supply then? If you do, you are golden; this is normal.


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> faq731-376

 

[waross]

That is the same ratio as a 200V rated motor connected to a 208V supply

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[itsmoked]

So then was your original post a dyslexic error?

Naw, looks more like a cell-phone impairment.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[SyncCheck]

amper,

This dose not look like a big problem,just keep in mind that the motor can get slightly warmer when run at a lower voltage.