1, often keep the motor clean When the motor is running, dust, water stains, and other sundries must not be allowed within at least 3m around the air inlet to prevent it from being drawn into the motor to form a short-circuit medium, or to damage the wire insulation layer, causing a short circuit, increasing the current, and increasing the temperature. Burned the motor. Therefore, to ensure that the motor has sufficient insulation resistance, as well as a good ventilation and cooling environment, in order to enable the motor to maintain a safe and stable working condition in long-term operation. 2. Keep the motor working at rated current Motor overload operation is mainly caused by excessive load, low voltage, or mechanical locking. If the overload time is too long, the motor will absorb a large amount of active power from the power grid, the current will increase sharply, and the temperature will increase. At high temperatures, the insulation of the motor will be burned out due to aging. Therefore, when the motor is in operation, it is necessary to pay attention to checking whether the operation of the transmission is flexible and reliable, whether the concentricity of the coupling is standard, and the flexibility of the gear transmission. If any stagnation is found, stop the machine immediately to find out the cause and troubleshoot. 3, often check the three-phase current of the motor is balanced For a three-phase asynchronous motor, the difference between the phase current of any three-phase current and the average of the other two currents must not exceed 10%, so as to ensure the safe operation of the motor. If it is exceeded, it indicates that the motor is faulty and must be identified. 4, check the motor temperature should always check the motor bearing, stator, housing and other parts of the temperature change Especially for motors without voltage, current and frequency monitoring and without overload protection, the monitoring of temperature rise is even more important. Whether the motor bearing is overheated or lacks oil, if it is found that the temperature rise near the bearing is too high, it shall be immediately checked for shutdown. Whether there are cracks, scratches, or defects in the surface of the rolling element or raceway of the bearing, whether the bearing clearance is excessively swaying, and whether the inner ring rotates on the shaft. Any of the above phenomena occur. All bearings must be renewed before they can be renewed. 5, observe the motor vibration, noise and abnormal smell If the motor is vibrating, it will cause the connected part of the load to increase its non-concentricity, resulting in an increase in the load on the motor and an overloaded operation that will burn the motor. Therefore, when the motor is in operation, especially high-power motors, it is always necessary to check if the anchor bolts, motor end caps, bearing glands, etc. are loose, and the grounding device is reliable. If any problems are found, solve the problem in time. The noise of the noise field and odor are precursors of abnormal operation of the motor and serious failures immediately. It is necessary to find out and find out the cause of the malfunction at any time. 6, to ensure the normal operation of starting equipment The technical condition of the motor starting equipment plays a decisive role in the normal starting of the motor. Practice has proved that the vast majority of burned motors are caused by abnormal operation of the starting equipment. If the start-up equipment has a phase-to-phase start, the contactor contacts arc, sparks, etc. The maintenance of the starter equipment is mainly cleaning and fastening. If the contactor does not have a clean contact, the contact resistance will increase, causing the heat to burn out the contacts, causing the lack of phase and burning the motor; the contactor sucks the iron core of the coil and the dust The product will cause the coil to pull loosely and generate strong noise, increase the coil current, burn the coil and cause failure. Therefore, the electrical control cabinet should be set in a dry, ventilated and easy-to-operate position and regularly dusted. Always check whether the contacts of the contactor, the core of the coil, the wiring screws, etc. are reliable, and whether the movement of the mechanical parts is flexible, so as to maintain a good technical state, so as to ensure smooth start-up work without burning the motor. Book shape, saving money can also be used as home furnishings Steel Safe,Book Safe,Creative Book Safe,Book Secret Safe Box Ningbo Reliance Security Technology CO.,Ltd , https://www.reliancesafes.com
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How to avoid the motor burn out
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