There is a 380V equipment power supply in a power box. How do you calculate the current and power? The three-phase four-phase system is powered by four wires, three phase wires, and one common wire, which is a neutral wire. The voltage between each phase line and the neutral line is called the phase voltage, and the line voltage is 3 times the root of the phase voltage. The usual 380V is the line voltage, and 220V is the phase voltage. The current calculation formula for the 380V motor (three-phase air conditioner compressor) is: I = rated power ÷ (1.732 & TImes; rated voltage & TImes; power factor & TImes; efficiency). Power factor is an important technical data for power systems. Power factor is a factor that measures the efficiency of electrical equipment. The low power factor indicates that the reactive power of the circuit for alternating magnetic field conversion is large, thereby reducing the utilization rate of the device and increasing the power loss of the line. Three-phase electric (380V) power, voltage, current calculation formula: Power = Current & TImes; (1.732 x 380 voltage x 0.85 power factor x 0.9 efficiency). Calculate the rated current of the motor as 7.5: 7500 ÷ (1.732 × 380 × 0.85 × 0.9) = 14.896A. For example: 15KW motor 380V. When the electric voltage is 380V: P=UICOSφ/1.72, the current is: I=15KW/380V/0.83 (COSφ, power factor/1.72x1000=27.7A. (line current). The relationship between AC current and power: Single phase: I=P/220; Three phase: I=P/1.73×380. DC power: P=U*I =I2R =U2/R. What is the meaning of active power, reactive power, and apparent power? Apparent power refers to the total power emitted by the generator, which can be divided into active part and reactive part. This part of power is called active power due to work done. It can be considered as the loss of the phase difference between voltage and current. Reactive power does not work, but it must be with the reactive part. The active part is the power lost by the wire heating loss or the pure resistive load, and the reactive power is the power lost on the non-pure resistive load. However, to ensure that the transmission of active power must first meet the reactive power of the grid. Exchange Rate Display Board,Currency Exchange Rate Display Board,Display Exchange Rate,LED Display Exchange Shop Suzhou Ribao Technology Co. Ltd. , https://www.ribaoeurope.com
