Standard 1.15 service factor at 40°C (104°F) ambient for 60 hertz, NEMA Design B.  Designs A, C and D are also available on request.      

CONSTRUCTION      

Full cast iron construction including cast iron fan cover and cast iron conduit box assembly.  The fan cover has a protective type grill that restricts the passage of a 1/2" cylindrical rod. 

INSULATION      

Class F nonhygroscopic system is standard and meets or exceeds NEMA and IEEE standards.  Stator coil conductors receive multiple coatings of premium grade insulating enamel.  Slot cell is made from a laminated material that provides high dielectric strength, great mechanical strength, and affords a positive moisture barrier.  Glass, one of the materials used, affords positive protection against "thermal cut through" between the wire and lamination stack. 

BEARING CAP     

TEFC frames 324T through 449T have an inner bearing cap of non corrosive, zinc plated and chromated steel.

At the fan end, TEFC motors have a tube that extends through the fan cover for in-service lubrication.  A standard 1/8" pipe plug is used for inlet, and a separate, pressure sensitive, spring actuated relief plug is used at the grease outlet on the bracket hub.  At the shaft end, TEFC motors have a pipe plug on inlet and relief.  

DRAIN PLUGS      

Pipe tap plugs are furnished at the low point of each end bracket.  Frames 143T through 215T have a 1/8" plug, while frames 254T through 449T have a 1/4" plug.      

BEARINGS   

Pre-packed with grease for ambient temperatures of -30°C to +50°C (-22°F to +122°F).  Other temperature ranges available on special order with single-shielded, temperature stabilized bearings.   

COOLING FAN 

Glass fibre reinforced polyester suitable for bi-directional rotation.  Exception:  3600 RPM motors in frames 444T and larger are unidirec- tional only, and made of corrosion resistant bronze alloy.

HICO electric motors incorporate all standard NEMA, TEFC cooling characteristics.  The bi-directional fan draws cooling air through the fan cover and directs it evenly over the motor frame.  In addition, internal rotor vanes help to equally distribute the air by circulating cooler air near the motor frame towards the warmer internal components.  This generous, even flow of cooling air throughout the machine provides ample cooling and assures against localized heating or hot spots. 

Enclosed motors are recommended for the most severe applications where moisture and/or airborne chemicals and dust, etc., are present.  Some representative locations include chemical plants, paper mills, refineries, steel mills, cement mills, and grain handling.  The use of space heaters is recommended where long idle periods are expected. 

For moist, hot tropical climates where fungi could form, special protection can be provided as an option and at extra cost.  Unless otherwise specified, tropical protection includes moisture resistant insulation plus fungus protection on all electrical parts, windings, rotor outside diameter, and stator inside diameter.