Summary:...
First of all, find out whether the motor burns because of the burning of the bearing (mechanical failure) or the burning of the coil (electrical failure). If the coil is burnt and the motor burns down, it may be caused by overcurrent. Sometimes the voltage is too high or too low to cause the coil to heat up and short-circuit, so first check if the voltage during operation is too much different from the rated voltage.
Long-term overload operation of the equipment, long-term operation under the condition of over-rated current or over-rated current. Special attention should be paid to that the starting current of the motor is 3-5 times the rated current, so it should be avoided to start the equipment with load or full load operation (mainly depends on the matching margin of the rated current of the motor and the normal operating current)
The working environment of the motor is relatively humid. (The environment of the motor is not matched) The ground insulation and phase-to-phase insulation of the coil should be checked before the motor is started. The insulation requirements of different voltage levels are also different. You can refer to the relevant national standards for inspection. During the operation of the motor, attention should be paid to the waterproof and moisture-proof of the motor.
The mechanical failure of the pump causes the
planetary gear motor to be overloaded, the current is too large and the coil is burnt.
There is a problem with the heat dissipation of the motor. Generally, motor coils are air-cooled, and submersible pumps are water-cooled. Large motors are mostly cooled by air-to-air heat exchangers and air-to-water heat exchangers. If the cooling water (air) is broken, the coil cannot dissipate heat, and the coil may be burnt.
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