Brake Motor Series

ATT Brake Motor Series are made to efficiently perform braking duties. Our team can fully customize these brake motors according to the customer’s different requirements.


Our selection of brake motors can also be used in marine industries for winches and other purposes.The electro-magnetic disc brake is powered, by either DC current through a rectifier located in terminal box or three phase AC current. When the brake coil is de-energised, the brake is actuated by spring pressure. The axial movement of the brake disc performs a dual braking action against the moving electromagnet and the motor shield, without pressure or impact being transmitted to the bearings.

Item Standard Specifications
Type of Motor Squirrel Cage Cast Iron / Aluminium Induction Brake Motor
Design Standard IEC 60034-1
Framesize 80-315L
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)
Cooling Method Self external fan, surface cooling (IC 411); No external ventilation (IC 410)
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 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)
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; Bearing & Winding RTD
Brake Accessories Manual hand release / Wheel release / Bolt release
Rectifier Can operate within 10% voltage variations; compact, can be installed in main T-Box
Shaft Double ended shaft; Special shaft
Insulation Class Class H
Degree of Protection Up to IP66

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