How to measure the motor resistanceThe motor is an alternating current motor
The measuring steps of motor insulation resistance are as follows:(1) disconnect the ends of the 6 ends of the motor junction box(2) the megohm flat, without wiring, shake table megohm. Hands should point to the quotupquot, then form "L" (line) and "e" (ground) two terminals with line short circuit test clamp, slowly shaking the handle, needle should to "0".(3) to measure the resistance between motors. Two test clips were received any two windings on either end of the head, flat on the shake table, at 120 RPM speed megohm shake table after a minute hand read stability indicating value.(4) using the same method, in order to measure the insulation resistance of each phase winding and housing value. It should be noted that the table marked "post e" or "ground", to be no insulation on the casing.
The insulation resistance of the stator of each 5 kV high voltage motor at the working voltage of 0. kV shall be no less than 1 ohm, and the minimum value of the insulation resistance of the winding rotor winding per kilovolt working voltage shall not be less than 15 euro; the insulation resistance of the two circuit of the motor shall not be less than 1 ohm
Use megohmmeter to measure the insulation resistance, usually 500 volt megger motor to below 500 volts voltage; 500 to 1000 volt motor with 1000 volt megger. 2500 volt megger motor to above 1000 Volts voltage.When the motor is in the hot state (75 DEG C), the insulation resistance of the medium and small sized low voltage motors shall be no less than 0.
Generally, the insulation resistance of motor is measured by means of ohmmeter. The insulation resistance value between each phase winding and each phase winding and casing is measured to judge the insulation performance of motor
