Water pump motor burned out, what is the reason

Generally speaking, nowadays, water pumps are widely used in daily life and production, and now a lot of water pumps are generally equipped with the corresponding water pump special three-phase asynchronous motors, so what are the reasons that lead to the water pump special motor burned out? To figure out the reason why the water pump motor burned cause, first of all, to clarify the motor is a mechanical failure or electrical failure, only to figure out the two reasons for the subsequent maintenance.

The actual use of the head is lower than the pump nameplate head too much overload startup operation can cause damage to the motor; pump running without water for too long a period of time, these are the reasons that may lead to the motor burned out in the process of use.

If the coil is burned caused by electrical faults, then the burned cause is mainly due to the current is too high or too low, when the power supply voltage is too high or too low will also cause the coil heating caused by short circuit, so in the operation of the time should be the first to check the operation of the voltage is not with the rated voltage difference is too large.

The causes of short-circuit motor current are as follows:

One, the motor electrical failure When the pump equipment overloaded operation, so that the pump motor for a long time in the rated current or over the rated current of the state of the pump, to pay attention to, especially the motor start-up current is the rated current of the three to five times, so try to minimize the start-up of the equipment when the loaded or full-loaded operation (generally mainly to see the). Motor rated current and normal operation current matching margin)

Two, when the mechanical failure of the pump caused by the motor load is too large, the current is too large and burn the coil.

Third, the pump motor works in a humid working environment. In the motor before starting should check the coil insulation to ground and phase-to-phase insulation, different voltage levels corresponding insulation requirements are different, you can refer to the relevant national standards for fine-tuning checks. In the motor operation process, pay attention to the motor waterproof, moisture, corrosion and other issues.

Four, the pump motor cooling problems. Most of the general water pump motor is water-cooled shell. Now the large water pump motor more air - air heat exchanger, air - water heat exchanger cooling method. If the cooling water (air) is broken, so that the water pump motor coil can not dissipate heat, it is possible to burn the coil