Tatung Electric Motors are a high quality, ALL CAST IRON motor. In business since 1918, Tatung manufacturers a full range of motors by means of highly automated manufacturing processes. We are a stocking distributor with a diverse inventory in stock at our warehouse. ARESCO is proud to offer the following available motor options to satisfy your requirements.
Every Tatung Motor Is Cast Iron
– ¼” Horsepower Up To 10,000 + Horsepower
– 900, 1200, 1800, 3600 RPMs Standard
– Non-Standard “Special Rpm” Motors Available (i.e. 400 Rpm)
– All Standard Voltages From 230 and 460 Volt All The Way Up To 15,000 Volt
– Integral Frame Types: ODP (Open Drip), TEFC (Totally Enclosed Fan Cooled), TENV (Totally Enclosed No Vent), Explosion Proof, TEFC Wash Down, TEFC Chemical Duty, IEEE 841, (severe duty)
– 56 Frame Motors
– NEMA Design A, B, C, D, and other specials
– Super High Efficiency Motors (Our Supermax and Extramax Line)
– EPAct compliant motors (our Extramax Line)
– Inverter Duty Motors (Good for 10:1 Constant Torque or 20:1 Variable Torque)
– Vector Drive Motors With Encoders
– 2 Speed Motors and Multiple Speed Motors
– “C” And “D” Flanges
– Short Shafts
– Metric Motors (For Equipment From Foreign Suppliers!)
Nameplate Data
  • The National Electrical Manufacturer’s Association (NEMA) specifies that every motor nameplate must show these specific items: Manufacturer’s Name; Rated volts and full load amps; Rated frequency & number of phases; Rated full load speed; Rated temperature rise or the insulation system class; Time rating; Rated horsepower; Locked rotor indicating code letter; Service Factor; Efficiency; Frame Size; and Design Code. Additional information will normally appear on most nameplates.
  • This Technical Bulletin will go over the required nameplate items and many of the optional items that are shown on our Tatung nameplate. The required items will be covered first in the order previously mentioned.
Manufactures Name 
  • Self explanatory; however, we like to see the name “TATUNG” on our nameplates!
Rated Volts And Full Load Amps 
  • Tatung Motors will operate at a variety of line voltages, the most common being 230 and 460. These motors will operate according to NEMA limits at rated voltage.
  • Line voltage will fluctuate due to a variety of factors. Therefore, every motor must be designed to handle these voltage variations. Tatung motors can withstand voltage variation of plus or minus 10%, so a 230 Volt motor could operate between approximately 207 to 253 volts. At these extremes, no motor will run at its peak performance, however it will withstand these conditions.
Rated Frequency 
  • The frequency the motor is designed for represented by Hertz (cycles per second). 60 Hertz power is used throughout the United States, Canada, and other parts of the world while 50 Hertz is the standard in the rest of the world. Tatung motors can tolerate a frequency deviation of plus or minus 5%. Most Tatung motors are 3 phase motors because of cost effectiveness.
RPM (Revolutions Per Minute) of a motor is the speed at which the motor will rotate at rated voltage and frequency during full torque. This “full load” speed will normally vary between 87% and 99% of synchronous speed depending on design. This is known as slip.
Synchronous speed is the theoretical speed of a motor based on the rotating magnetic field. This is determined by the following:
S = (120 x F)/P
S = speed in RPM
F = frequency in hertz
P = # of poles in motor
Or, if you know the number of poles in your motor, you can determine the speed by the following chart:
# of Poles
Synchronous Speed
Actual Speed
Insulation is crucial in a motor. Tatung insulates its motor to withstand the greatest temperature that occurs at the hottest point within the motor for as long as the temperature normally exists. This is determined by, the ambient temperature, the heat generated at fully loaded conditions (temperature rise), and the thermal capacity of the motor insulation.
These materials are classified as A, B, F, and H.The classes are based on adding the ambient temperature and the operational heat created by the motor. They are shown below:
20,000 Hour Life Temperature