3 phase motor parameters

Hi everybody,

I need your help in understanding the following 3-phase motor parameters

"Totally enclosed

"Self-ventilated

"tolerance +/- 10%

"50 C.P.S

Hi Shohadawy,

"totally enclosed" means there is no opening other than the cable box. Those motors also have maintenance free bearings.

"self ventilated" - self explanatory - they have cooling fan built in, mostly a radial type fan at the rear end

"tolerance" RPM depends on frequency and number of poles.

"50 C.P.S. = 50 cycles per second or operating frequency 50Hz

Boncuk

Thanks Bonuk, but please let me ask another question, Does the noise level of the motor is controllable or it is fixed at a limit specified for each motor

You might check NEMA, manufacturer's websites or other organizations for a definitions. Reliance lists a number of enclosures that are totally enclosed:
TEAO - Totally-Enclosed, Air-Over
TEBC - Totally-Enclosed, Blower-Cooled
TECACA - Totally-Enclosed, Closed Circuit,, Air to Air
TEDC-A/A - Totally-Enclosed, Dual Cooled, Air to Air
TEDC-A/W - Totally-Enclosed, Dual Cooled, Air to Water
TEFC - Totally-Enclosed, Fan-Cooled
TENV - Totally-Enclosed Non-Ventilated
TETC - Totally-Enclosed, Tube Cooled
TEWAC - Totally-Enclosed, Water/Air Cooled
TEXP - Totally-Enclosed, Explosion-Proof

Boncuk's descriptions are correct. This information suggests that there are many types of totally enclosed motors - that may or may not be of help to you. I was not sure why you needed the information. Sometimes the people who use a term actually mean something very specific - TEFC is Totally Enclosed Fan Cooled and is very common so that people say "totally enclosed" when they mean TEFC - but they might also mean some other variant of totally enclosed motor.