many people know whether it is a stepper motor or what is needed to make insulation, so the insulation strength of the nature is some, so today Xiaobian want to tell you is how to measure the insulation resistance value.
Normal if we are to use megohmmeter to measure insulation resistance value of the motor, mainly to measure each phase winding and each phase winding casing and the insulation resistance value, the main will be able to determine the motor insulation performance is good or bad.
If you go to the table when using megabytes of insulation resistance measurements, we usually use 500 volt megohm table to measure the motor and the voltage below 500 volts, where there is a motor of 500~1000 volts to 1000 volt megohm table to measure, so the above 1000 Volts

The voltage of the motor is required to use 2500 volt megohm table to measure.
There is a motor in thermal state (750C) conditions, then the general low-voltage motor of the insulation resistance value should be not less than 500 billion in Europe, the insulation resistance is high voltage motor stator voltage / Kv value is not less than 1 megohm, there is per volt working voltage

The insulation resistance of the wound rotor winding can not be less than 500 billion ohm at minimum, then the insulation resistance of the two circuit of the motor can not be less than 1 ohm.