General Purpose Motors/3 Phase Standard Efficiency (IE1)/AT Series (Aluminium Frame)/AT Series – Standard Efficiency (IE1) 3 Phase Aluminium Induction Motor

AT Series – Standard Efficiency (IE1) 3 Phase Aluminium Induction Motor

ATT AT Series compromises of 3-phase, squirrel cage, IE1 standard efficiency (IEC 60034-30-1) motors in Aluminium die cast frame.


A removable foot mount is integrated in AT Series motors as an additional feature to enhance its capability. It can be used for general purpose applications in machines as well as in areas which have weight limits due to lighter aluminium frames.

Item Standard Specifications
Type of Motor Totally Enclosed Fan Cooled (TEFC) Squirrel Cage Aluminium Induction Motor
Design Standard IEC 60034-1
Framesize 80-132M
Voltage and Frequency Standard stock available are:

220-240/380-415V/50Hz for 2.2 KW & below

380-415/660-720V/50Hz for 3KW & above

Other voltages & frequency such as 200V, 346V, 440V & 60Hz can be supplied on request

Power Conditions ± 5% of rated voltage and ± 1% frequency± 1% phase unbalance
Efficiency Standard IE1 (IEC 60034-30-1)
Time Duty Continuous S1
Cooling Method Self external fan, surface cooling (IC 411)
Method of Starting Full voltage direct on line starting or star-delta starting
Insulation & Temperature Rise Class Class F insulation and Class B temperature rise
Degree of Protection IP55
Rotor Winding Squirrel cage, aluminium conductor with end-ring and wafter blades integrally cast
Environmental Conditions Place: Non-hazardous, shaded

Ambient temperature: -20°C to 40°C

Relative humidity: Less than 90% relative humidity (non-condensation)

Altitude: Up to 1,000 metres above sea level

Direction of Rotation Standard motors are suitable for operation in either direction of rotation of shaft.

Direction of rotation can be reversed by interchanging any two of the power lines.

Test Procedure IEC and full voltage measuring starting operation
Fan Cover Pressed steel
Shaft Carbon Steel, round shaft with key
Bearing Sealed, lubricated-for-life bearings
Painting Phenolic rust-proof base plus lacquer surface finish. Painting in ATT IE2 Green
Ground Terminal NE set inside the terminal box


Other Options Available (Contact ATT to inquire for other options)
VSD Driven Inverter duty motor suitable for VSD operation
Heaters Space heaters (110V/220V/1ph) or winding heaters available on request
Thermal Protection PTC thermistor 150°C
Insulation Class Class H
Degree of Protection Up to IP66

The table below contains the various types of mounting available for AT Series motors. If you are unable to find the dimensions to the mounting you prefer, please contact us for the outlining dimensions.