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TEFC vs. TEAAC Motors

TEFC vs. TEAAC Motors

TEFC vs. TEAAC Motors

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.


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

RE: TEFC vs. TEAAC Motors

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.)


"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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