Analysis of Common Faults of Single - phase Fountain Pump

First, the power supply voltage is normal, the fountain pump insulation performance is good, but why do not start after the fountain pump power?

(Symptom: current after fountain pump powered or completely silent and no signs of start)
1, the power wiring midway open state;
2, the main a winding or auxiliary winding open, followed by poor contact;
3, the capacitor or switch contacts are not closed, so that the secondary winding can not power work;
4, starting capacitor wiring open or internal circuit;
5, the pump cavity within the foreign body stuck around the live impeller rust sticky;
6, abnormal motor windings or fountain pump which parts accidental damage.

Second, the power supply voltage is normal, power after the fountain pump start difficult, and hum and vibration, the current is maintained at a certain value does not decline.

(Symptoms: fountain pump starts slowly, there is noise, vibration, current high)
1, the load is too heavy;
2, the motor stator and rotor friction, the internal friction or impeller stuck to form the block;
3, the bearing is not working properly; (due to poor bearing assembly, bearing oil consolidation, bearing cage or ball breakage);
4, the motor winding abnormal (once overloaded operation led to phase turns damaged, but not completely breakdown, burned) 5, the pump cavity there is a lot of air.

Third, power, the power fuse quickly fuse.

(Symptoms: knife fuse immediately fuse, leakage protector jumped, knife refused to close)
1, there is short circuit between the winding phase or motor electrical conductivity;
2, the motor leads to the phase line grounding or wiring anomalies;
3, the capacitor short-circuit or fountain pump was stuck, start instantaneous current suddenly increased several times;
4, the fountain pump motor chamber water or other factors cause electrical conductivity;
5, the motor winding burned directly connected to the ground;
6, using the fuse does not match the current fountain pump;

Fourth, the fountain pump without any protection devices, power start, the speed is lower than normal.

(Symptom: fountain pump speed can not meet the rated requirements)
1, the main winding phase inter-turn short circuit or the line contact is bad;
2, the main and secondary windings within the coil reverse connection failure; (a circle of copper wire)
3, bearing damage or fountain pump load is too heavy;
4, the overall function of the motor winding aging but no breakdown phenomenon;
5, the electrical conductivity or machine cavity in the presence of water;
6, the power supply voltage is unstable or the input motor voltage is lower than the rated value;

Fifth, the fountain pump is running, the temperature rises.

(Symptoms: power fountain pump quickly fever, abnormal hot, smoke phenomenon)
1, main and auxiliary windings with phase turns or short circuit to ground;
2, the main winding auxiliary winding between the internal short-circuit fault;
3, after starting. Capacitor due to failure, interfere with the auxiliary winding leading to the main winding can not work properly;
4, the main winding auxiliary windings connected to each other wrong;
5, capacitance damage or wrong capacity;
6, stator, rotor core friction or bearing damage;
7, the fountain pump components exist card erase phenomenon or load heavier;
8, the fountain pump is currently in overload operation

Manufacturers recommend: Shenlong stainless steel fountain pump

Keywords:Single - phase fountain pump, common failure analysis