Brake motor installation and commissioning

I. Preparatory Work Before Installing the Brake Motor For newly installed motors or motors that have been idle for more than three months, inspect their performance, electrical performance, and mechanical performance before use to ensure reliable operation.

1. Check the insulation resistance of the brake motor winding. Open the junction box. Use a megohmmeter of 500V or more to measure the insulation resistance between the winding and the frame. The normal resistance value should be >5M ohms. Remove the terminal continuous strip and measure the insulation between the windings. The normal resistance value should be >10M ohms. If the resistance value is significantly low during the above measurement process, the motor should be disassembled to find the cause. If there is no fault point, it indicates that the motor is damp, resulting in a decrease in insulation performance. Baking and dehumidification should be carried out until the insulation is qualified before installation and use.
2. Measure the three-phase winding resistance. Check if the resistance values are similar. If the resistance values differ significantly, check if there are reasons such as poor contact in the motor winding leads.
3. Check if the brake motor mechanical parts are qualified. Manually rotate the shaft to check if it is flexible and whether there is any abnormal friction, jamming, shaft runout, or abnormal noise. At the same time, check if all parts are complete and if the fastening screws are tightened. Check if the coupling or pulley is installed and adjusted properly.

II. Installation and Trial Run of Brake Motor
Before connecting the brake motor, check if the control circuit and protection circuit are normal, if the fuse selection is appropriate, and if the connections between the control devices are reliable. If normal, connect the motor power supply and start it without load to check if the motor running direction meets the equipment requirements. If the rotation direction is reversed, simply exchange the positions of any two wires of the motor connection board power supply. After the normal start-up test, connect the motor to the load for a trial run and check if the operating current is normal. If the current is too large, stop the machine and check. If the motor does not rotate or the speed is very low after loading, or there is an abnormal humming sound, immediately cut off the power. If the power is on for a slightly longer time, it may destroy the motor winding, even damage the control circuit and equipment. Generally, in this situation, the mechanical cause is an overload or jam, and the electrical cause is single-phasing. At this time, carefully check the cause of the fault and restart only after the fault is eliminated.