First determine what the static water level is in your well, which is the height of the water surface above the ground when the water pump is operating normally. Since we have not installed a water pump, we cannot measure this distance temporarily. so measure the distance between the water surface and the ground when there is no pumping. Subtract 10 meters from the value measured as net height. At this time, calculate the shaft power P = flow × head ÷ 102 ÷ 3.6 ÷ efficiency. The general flow rate of a 2-inch agricultural pump is between 20 and 30 cubic meters, and the efficiency is generally between 55% and 55%. About 60%, calculated based on the static water level of 30 meters, the flow rate takes the larger value, and the efficiency takes the smaller value P = 4.45 kW, which gives a margin of 20% = 5.3 kW, so the water pump power is 7.5 kW, calculated based on the die motor powersalt: 1 horsepower = 0.73549875 kilowatts, so the diesel engine chooses a minimum of 11 horsepower.
This method of watering the soil is quite expensive!
How big of a generator is needed to run a 110 kW water pump?
Please use it with caution.
The main component of the submersible pump is the motor. Starting the motor has the particularity of requiring a significant starting current, which is approximately 3 to 7 times the rated current. Calculated, a 1.5 kW motor requires at least a 7-8 kW generator to start. Therefore, higher power motors must be equipped with a star angle conversion device or a variable frequency starting device. Particularly for heavy-start loads (all submerged in water) such as submersible pumps, starting will instantly cause the overcurrent protection to trip.
There is a way to check this. Before starting the submersible pump, lift it out of the water, then close it and start the submersible pump without load, after the motor runs normally, turn it on slowly. in water. The main objective of using this method is to avoid starting under heavy load. If it can continue to work, it means the motor has high quality and good performance; if it still trips due to overload, you can only upgrade to a high power generator.
110KW, the reactive power required at start-up is about 500KVAR, the 200KVA generator can provide about 200*0.6*1.3 and about 150KVAR, the capacitor requires 350KVAR, the capacity is only not small. There is also a problem. It is difficult to start the motor and turn the capacitor on and off synchronously. For example, if the capacitor is inserted and the load is not turned on, theThe voltage will rise instantly, the generator will seriously advance. in phase, or even lose magnetism. Change it to frequency conversion.