ATT Heating, Ventilation, and Air Conditioning (HVAC) Series motors are designed with dynamically balanced rotors for reduced vibration and quiet operation. They include heavy duty industrial designs as well as designs for commercial applications.
These applications include ventilators, direct drive and belted fans, exhaust fans, unit heaters, air conditioning units, and commercial refrigeration condensers. Also included are motors designed especially for use with variable speed drives (VSDs) that are used to conserve electricity.
| Item |
Standard Specifications |
| Type of Motor |
Totally Enclosed Air Over (TEAO) Squirrel Cage Cast Iron / Aluminium Induction Motor |
| Design Standard |
IEC 60034-1 |
| Framesize |
80-355L |
| 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; ± 1% frequency and ± 1% phase unbalance |
| Efficiency Standard |
IE1 / IE2 / IE3 (IEC 60034-30-1) |
| Time Duty |
Continuous S1 |
| Cooling Method |
TEFC (IC 411); TEAO (IC 418) |
| 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, shadedAmbient 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 |
Grease pre-packed shielded ball bearing |
| Lubrication |
Lithium-base grease (Shell Alvania R3) |
| Painting |
Phenolic rust-proof base plus lacquer surface finish. Painting in ATT Blue |
| Ground Terminal |
NE set inside the terminal box |
| Other Options Available (Contact ATT to inquire for other options) |
| Accessories |
Can be supplied with separate terminal box and 1 meter extended lead wires |
| 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 HVAC Motor Series. If you are unable to find the dimensions to the mounting you prefer, please contact us for the outlining dimensions.
