Motor starting before the examination

New or stop using the motor for a long time, before the use should check between the winding and winding insulation resistance ac induction motor to ground. Usually below 500 v for the motor insulation resistance meter with 500 v; The 500-1000 with 1000 v v motor insulation resistance meter; Of more than 1000 v motor insulation resistance meter with 2500 v. Insulation resistance shall not be less than 1 m Ω work every kv voltage, and measured in the condition of motor cooling. (2) check whether there is any crack on motor appearance, all fastening screws and parts are complete, the thinking of www.dongfeng-motor.com fixed situation are in good condition. (3) check the motor drive induction motor sales mechanism work is reliable. As shown in (4) according to the nameplate data, such as voltage, power, frequency, coupling, rotating speed and power supply, if load is consistent. (5) monitor the ventilation of the motor and bearing lubrication situation is normal. (6) turn the motor shaft, check that the rotor can free rotation, the rotation has no noise. (7) to check the motor brush and brush lifting mechanism is flexible assembly, for the location of the brush handle is correct. (8) check reliable electrical grounding device.