Motor FLA

[dgreat1]

Can anybody provide info, references, website link, manufacturer's standard for full load current of motors (1-phase and 3-phase) for 400 V and 690 V (from fractional HP or KW to max. standard rating)?

Any help would be appreciated.


PEE2244

 

[kraigb]

I think there may have been an eng-tips thread on motor FLA before, so you may want to search for it in case someone posted some links for that kind of information.
There may be some data in the National Electric Code (NEC), but I don't know how much detail it contains.

I muddled around GE's website for a while, but couldn't find what I thought I had seen there before. Perhaps you will if you have the time and patience.

I did find a table at the following URL:

http://www.acicontrols.com/catalog/page395.html

Hopefully some of the other members also have favorite places that they go for this kind of information.

 

[kraigb]

I found a better reference that I downloaded a while ago from Cooper Bussmann. They have an electrical protection handbook in PDF format (they call it the SPD, for Selection of Protective Devices, I think). I tried to get onto their website

http://www.bussmann.com,

but got some kind of server error.
If you are unable to pull up their website, I can send the PDF file to you if you want to give me your e-mail address.

 

[busbar]

See

http://www.bussmann.com/library/docs/spd.pdf

Motor Circuit Protection heading.

 

[jbartos]

Suggestion: Visit

http://www.thepanelshop.com/motor_current_ratings.htm

http://shop.emotorstore.com/estore/TD_BasePage.asp?

etc. for more info
400V motor appears to be IEC Standard compliant motor
690V motor is not NEMA standard motor

 

[busbar]

jbartos, I think 690V is produced from wye-connected 400V transformer secondaries, the same way 400V is derived from 230V transfomer windings. Maybe it would be equivalent in the US to 830Y/480V service sometimes used for oilfield deep-well submersible pumps.

 

[jbartos]

Suggestion: The 400Vdelta/690Vstar motors tend to be European or IEC compliant. Visit

http://www.ad.siemens.de/sd/support/technical_infos/catalogue_data/html_76/index.html

for more info