Small submersible pump current excessive situation

Classification:

The following explains the small submersible pump current is too large and the reasons for overheating The wear of the motor submersible pump bearing will cause the submersible pump to be in an abnormal working state mechanically, resulting in a large current phenomenon, which can be solved by repairing or replacing damaged bearings and bushings.

Explain belowSmall submersible pumpThe occurrence of excessive current and the cause of overheating

Why do small submersible pumps sometimes have excessive current during operation?

(1) If the use flow exceeds the use range, the motor will be overloaded. The disposal method is to adjust the valve appropriately to reduce the flow of the submersible pump so that the pump is in the normal use range.

(2) The bearing wear of the motor submersible pump will cause the submersible pump to be in an abnormal working state mechanically, resulting in a large current phenomenon, which can be solved by repairing or replacing damaged bearings and bushings.

(3) The wear of the thrust bearing, the wear of the water pump impeller and the lower cover plate will also cause the mechanical failure of the submersible pump, and even damage the submersible pump in serious cases. The treatment method is to check the cause of the wear of the thrust bearing and whether the mechanical seal at the shaft extension end is damaged, causing sand and impurities to enter the motor cavity, causing excessive wear of the thrust bearing, which also affects the operation of the submersible pump. Therefore, found wear or damage to be replaced in a timely manner.

小型潜水电泵

　　Small submersible pumpWhat is the cause of overheating?

1. the voltage is too high or too low, under a specific load, if the voltage variation range exceeds 10% to-5% of the rated value, the motor will overheat. The three-phase voltage of the power supply is asymmetric, and the three-phase voltage of the power supply is unbalanced by more than 5%, which will lead to overheating of the winding. Experience shows that more than 85% of agricultural motors are burned due to phase loss operation, so the motors should be equipped with phase loss protection devices.

2.Small submersible pumpThe reason for the power mismatch is that the small carriage and the motor are overloaded for a long time, and the motor temperature is too high; the motor that starts too frequently and is rated for short-term or intermittent operation will continue to work. The number of starts should be limited, and the correct selection and use should be made according to the calibration quota on the motor. Thermal protection.

3. to the reason of the wrong connection of the motor, the tripod shape is misconnected into Y shape, which makes the temperature of the motor rise rapidly. Stator winding has inter-phase short circuit, inter-turn short circuit or local grounding, which may cause local overheating of the motor and severe insulation burnout. Squirrel cage rotor has broken bars or defects. The temperature of iron core rises rapidly after the motor runs for 1~2 hours. If the ventilation system fails, check whether the fan is damaged and the rotation direction is correct, whether the ventilation pipe is blocked; bearing wear and rotor eccentric sweeping holes make the stator and rotor cores rub against each other, making metal impact sound, the temperature of the core rises rapidly, and in severe cases, the motor emits smoke or even the coil burns.

4. the working environment of the motor winding is humid or dust, oil, etc., attached to the winding, resulting in reduced insulation, the insulation resistance of the motor should be measured, cleaned and dried. The temperature is too high. When the ambient temperature exceeds 35, the inlet temperature is high, which will cause the motor temperature to be too high. The working environment should be changed as much as possible, such as building a shed to shade. Note: If the submersible pump fails due to electrical reasons, an electrician with a professional qualification certificate should be invited to repair it. People who know little about it should not repair it blindly to prevent personal injury accidents.

Well, thank you for watching. If you need to purchase small submersible pumps, you can contact our manufacturers.

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