The series motors comply with the applicable IEC or European standards. The motors also comply with various national standards.
The motors are totally enclosed, separate-fan cooled, IP55 degree of protection, temperature class F, IMB3 mounting arrangement (others available).
The motors are inverter-fed. Constant torque frequency range is 5 to 50 Hz. When frequency above 50 Hz is required, please be stated.
The motors have rated efficiency above IE4. The motors, at different load, still have much more high efficiency than three-phase induction motor.  The motors also have high power factor, small current and low heat.