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TEFC vs. TEAAC Motors

TEFC vs. TEAAC Motors

(OP)
HI all,

I have a 2,000 HP motor to be procured and designed to be operating outdoors exposed to summer and winter time conditions. Outdoor ambient can be as cold as -45 Deg C (Canada).

I initially specified TEFC as these are vertical motors and TEFC would offer more compactness against TEAAC.

However, my client is asking for a TEAAC cooling system. I disagree as first, the motors are vertical mounting. Second, all TEAAC motors I have seen in the past are all horizontal and are installed indoors.

I would like to seek technical opinion from experts in this forum. Thank you.

RE: TEFC vs. TEAAC Motors

A previous thread explored this issue to some extent and maybe useful. I am not sure that i have linked to the thread properly so if i haven't just use the forum search button and put in TEAAC as the key word.

http://www.eng-tips.com/viewthread.cfm?qid=292405

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

RE: TEFC vs. TEAAC Motors

Howdy,
This is a very large motor for type TEFC enclosure. I don't recall seeing a TEFC motor > 500hp. Once you get to that size you generally consider something else (ie WP1, WP2, TEAAC).
Why is your Client considering TEEC (say over a WP2)? ie Is this motor to be installed in a nasty environment. What synch-rpm are you looking for?
TEEAC motors are available in a vertical configuration (I have never seen one, but the Siemens website does have some info on these puppies.)
GG

http://www.industry.usa.siemens.com/drives/us/en/e...

"I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931)

RE: TEFC vs. TEAAC Motors

We have a number of TEAAC vertical motors, slightly smaller than you're considering. We are in a coastal environment with saliferous and relatively polluted air from some heavy process industry neighbours. I won't say the motors have been entirely trouble-free over their lives, but most of the problems have centred around the drive-end bearing and the rigid coupling to a cryogenic pump. Internally the motors are in pretty good shape.

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