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Totally enclosed fan-cooled

Totally enclosed motors offer the greatest protection against moisture, corrosive vapors, dust, and dirt. Totally enclosed fan-cooled (TEFC) motors are the obvious choice rather than weather-protected below 186.5 kW (250 hp). Their internal and external ventilating air are kept separate external air never gets inside except for the small amount that enters by breathing. [Pg.2487]

For in-house correlations, the cost of electric motors should be correlated vs. horsepower with voltage, speed, and type of construction as correction factors or parameters. Correction factors for explosion proof or open drip-proof housings could he developed if most of the data is for TEFC (totally enclosed fan cooled) motors. Similarly, correction factors could be developed for 1,200 rpm and 3,600i pm with l.SOOrpm as the base. [Pg.233]

The choice for severe applications below 250 hp is the totally enclosed fan-cooled (TEFC) motor (see Figure 7-1). TEFC motors separate the internal and external ventilating air. Breathing is the only way external air ever gets inside. At some size above 250 HP, manufacturers presently switch from a rib-cooled to an exchanger-cooled motor for totally... [Pg.259]

TEFC - Totally Enclosed Fan Cooled where the shaft extends from both ends with a cooling fan attached to one with a shroud that directs air over strategically located cooling fins. This motor is m.ore commonly used when the motor is outside the air stream as when driving a gear box with a drive shaft or on blow-through towers. [Pg.80]

Standard Open or Totally-Enclosed Fan-Cooled (TEFC) generators and motors are acceptable in Division 2 areas if they do not contain brushes or other arcing contacts or high-temperature devices. Three-phase TEFC motors are acceptable in Division 2 locations, but singlephase motors usually contain arcing devices and are not acceptable... [Pg.525]

Type and specifications on fan driver, gear types, pow er voltage, phase, cycles. Motors should at least meet specifications equivalent to totally enclosed, fan cooled, or if in explosive hazardous area, TEFC Class I, Group D (except this not acceptable in hydrogen or acetylene atmosphere). Due to moisture conditions around this equipment, it should be protected against moisture penetration and corrosion. [Pg.387]

Figure 14-2A. Alternating current (AC) induction motor cross-sectional view of 220/440V, 3-phase, 60-cycle, totally enclosed fan-cooled standard motor. (Used by permission Reliance Electric Co., Div. Rockwell Automation.)... Figure 14-2A. Alternating current (AC) induction motor cross-sectional view of 220/440V, 3-phase, 60-cycle, totally enclosed fan-cooled standard motor. (Used by permission Reliance Electric Co., Div. Rockwell Automation.)...
A totally enclosed fan-cooled machine is a frame-surface cooled totally enclosed machine equipped for self-exterior cooling by means of a fan or fans integral with the machine but external to the enclosing parts. [Pg.649]

Totally-enclosed fan-cooled I, s 55°C 40 to 115% (135% for S) Abrasive dust, dirt, grit, corrosive fumes too severe for other types... [Pg.651]

Motor enclosures for outdoor use are NEMA weather-protected Type II, totally enclosed, fan-cooled, or drip-proof with weather protection. Motors of the latter type are widely used. Not only are they less expensive than the other types, but they also have a service factor of 1,15. The above enclosure types are all suitable for the Class I, Group D, Division 2 classifications usually encountered. [Pg.416]

IEEE 841, Standard for petroleum and chemical industry— Severe duty totally enclosed fan-cooled (TEFC) squirrel cage induction motors — Up to and including 370 kW (500 hp). )... [Pg.14]

Weather protected, I and II Totally enclosed fan cooled, TEFC, below 250 HP... [Pg.61]

Motors shall be squirrel cage induction type with (totally enclosed, fan-cooled) (encapsulated) (splashproof) enclosure and roller-type bearings with NEMA Class A insulation. Motors shall be (single... [Pg.174]

Totally enclosed fan-cooled motors are used where moisture or dirt is prevalent (protects the motor). [Pg.347]

Table 6.22 Comparison of a non-explosion protected motor with (E)Ex eh design (rated synchronous speed 1500 min-1, frame number 132,50cps, totally enclosed/fan cooled) (by courtesy of Loher GmbH, Ruhstorf/Germany)... Table 6.22 Comparison of a non-explosion protected motor with (E)Ex eh design (rated synchronous speed 1500 min-1, frame number 132,50cps, totally enclosed/fan cooled) (by courtesy of Loher GmbH, Ruhstorf/Germany)...
FIG. 29-4 Examples of open dripproof, totally enclosed fan-cooled, and weather-protected motor enclosures. Photo courtesy of Reliance Electric Company, Cleveland, Ohio.)... [Pg.2243]

Take-off Detailed quantity count of work components cubic yards, tons, feet, etc. TEFC Totally enclosed fan cooled. Term applied to electric motor. [Pg.352]

Totally Enclosed Fan Cooled ) Explosion Proof. Class ... [Pg.818]

Weather protected, I and II Totally enclosed fan cooled, TEFC, below 250 HP Totally enclosed, water, cooled, above 500 HP Explosion proof, below 3000 HP... [Pg.59]

Open Drip Proof Weather Protected Totally Enclosed Fan Cooled Other... [Pg.746]

Totally Enclosed — Fan Cooled ) Explosion Proof Class-----------Group ... [Pg.787]

Totally Enclosed — Fan Cooled )Explosion Proof Class —Group. [Pg.729]

See other pages where Totally enclosed fan-cooled is mentioned: [Pg.3]    [Pg.21]    [Pg.618]    [Pg.618]    [Pg.649]    [Pg.649]    [Pg.649]    [Pg.658]    [Pg.415]    [Pg.723]    [Pg.667]    [Pg.807]    [Pg.667]    [Pg.725]    [Pg.667]    [Pg.667]    [Pg.575]   


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