The series motors comply with the applicable IEC or European standards. The motors also comply with various national standards.
The motors are totally enclosed, fan-cooled, IP54 degree of protection, temperature class F, IMB3 mounting arrangement (others available), 50Hz frequency, 6kV rated voltage.
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, low heat and line-start ability.
The motors are widely used at air blower, water pump, belt machine etc. in the petrochemical industry, power industry, transportation industry, textile industry, mining industry etc.