How to do short circuit test of the motor?

Short circuit test is to use braking device,the motor rotor fixed don't turn,three-phase voltage regulator output voltage from zero values increased.When the current reaches the mini electric motor rated current of the motor is stop booster,when the voltage is called the short circuit voltage.The rated voltage of 380 v motor its short circuit voltage is in commonly 75 ~ 90v.High impedance voltage said leakage reactance is wholesalemotor.blogspot.com too big.Short circuit voltage electric motors price is too low said leakage reactance is too ac electric motor small.Both for normal operation of motor will be unfavourable.