What Is The Reason Why The Current Of The Submersible Pump Is Too High And Cannot Be Filled With Water

Submersible pumps are easy to use and have low installation costs, making them popular among users. Although submersible pumps are convenient to use, they often encounter operational failures.
(1) Cut off the power and pull the submersible pump ashore from the water. Check if the impeller is entangled or stuck by foreign objects, and if the motor cannot rotate due to increased current and heat generation.
(2) If there are no foreign objects entangled, is the impeller flexible to rotate? (Rotating the impeller of a submersible pump cannot be as flexible as a typical motor and can rotate multiple times with added force. A submersible pump can rotate due to the tight sealing components.)
(3) If it is used, it is very likely that the rotor bearings will be damaged and cannot rotate. Causing the motor rotor to sweep the bore, the bearings should be replaced, with both plates of bearings being replaced at the same time.
(4) Open the junction box and check if the three motor lead wires are firmly pressed in contact. Then use a multimeter to measure the three-phase winding in ohm RX1 range to see if it is normal. If one phase of the three-phase is not connected to the other two phases, it indicates that the motor is damaged and the current increases without water.
(5) The universal meter still measures the three core cable in the same gear, which is open circuit. If one of the three cores is not connected, it indicates that the single-phase operating current of the submersible pump increases and cannot produce water.
(6) The lack of phase in the electric source causes the submersible pump to operate in a single phase, and the current of the submersible pump increases. The motor cannot rotate and cannot produce water. At this time, use a universal meter with a voltage range of 500V to measure whether the three-phase voltage at the upper port of the knife switch is normal, and then measure the lower port. If the voltage at the lower port is not normal, it is likely that the internal wiring of the switch is loose, disconnected, or damaged, causing high current or no water output.
(7) Single-phase 220V submersible pumps generally do not have power supply problems. Regardless of whether there is a broken circuit or poor contact in the neutral or live wire, the motor cannot rotate. If such a malfunction occurs in a single-phase submersible pump, one should start to inspect the mechanical parts.