How to measure a 220V submersible pump with a digital multimeter - good or bad?
How to judge the 220V submersible pump good or bad, we first use a digital multimeter to measure the power supply voltage there is no, and then powered on to see if the submersible pump has rotated, or buzzing sound, if not, you check the following conditions, elecricity one of the three lines may not be able to get through, disconnected, pump motor winding burned out or winding grounded short-circuit, capacitor damage, bearing wear, impeller with foreign objects and the shaft body jammed.
First of all, the digital table dialled to the maximum range, with a red and black pen to pick up the three lines and pump motor shell resistance value, (the iron must be good) measured resistance value is close to infinity, the better, if the measured resistance is close to zero or tens of ohms for the grounded short-circuit.
Second, how to judge the capacitor is good or bad method, the general digital multimeter have the function of measuring capacitors, measurement can be discharged after the capacitor two pins directly into the table above the Cx jack, select the appropriate range, you can read the display capacity data. If the capacitor is good, the capacitance of the capacity value will be close to the value of the multimeter to pick up.
Third, the main and secondary winding resistance measurement judgement method, the general operation of the winding resistance value of a few ohms, while the starting winding resistance of dozens of ohms or tens of ohms between. If the measured resistance value of zero or a few Europe shows that the winding turns short circuit, infinity shows that the winding is broken.
Fourth, single-phase submersible pump has three terminals, with a digital multimeter
File to measure the resistance value between the three wires, the resistance of the largest two wires connected in parallel with the capacitor, the other wire (public) connected to one end of the power supply, and then use the multimeter resistor to measure the public end and the capacitor connected to the two ends of the resistance between the wires, the resistance of the other end of the power supply, the resistance of the other end of a slightly larger value.
