The motors are asynchronous squirrel-cage motors with compact dimensions in fin-cooled design. The motors are designed for converter-fed operation with the SINAMICS and SIMOVERT MASTERDRIVES drive system.
For further information and details, see the sections “Orientation” and "Technical data".
- Converter-fed operation
- Degree of protection: IP55
- Cooling method: IC01, self-ventilated
- Housing: Cast iron
The motors are available with standard insulation for voltages ?500 V or with special insulation for 690 V.
In the case of self-ventilated motors, such as series 1LA8, the thermally admissible load torques are reduced for continuous operation for speeds below the rated speed. This must be taken into account in those applications in particular that are not subjected to a load torque that is dependent on the square of the speed.
When motors are operated at speeds above their rated speed (operation in the field-weakening range), the maximum load torque is also reduced.
Guide values for the admissible load torques at various speeds can be obtained from the diagrams below.
Thermal limit torque characteristic 1LA8