How to do motor no-load test?

Before the test,inspection on motor,no problem,pass into the three-phase power supply,make the motor without pulling the load idling.And then to check operation of the sound,the workings of the bearing and three phase current,generally the large capacity of high wholesalemotor.blogspot.com speed motor no- load current 20 to 35% of the rated current for its small capacity no-load current of low speed motor for 35-50% electric motors 12 volt of the rated current is not idle current is too large and too small and three-phase equilibrium and no-load test time should not be less than 1 hour,should also measure the motor temperature rise at the same time,the temperature rise according to single phase asynchronous motorthe grades of insulation shall not gasoline generator exceed the allowable limit.