KW is also the unit of electric power, generally the unit of load. For example, the motor is 20KW, and the electric cabinet is its ability to drive the load.
The calculated load is also called the required load or the maximum load. The calculated load is an imaginary continuous load, and its thermal effect is equal to the maximum thermal effect produced by the actual changing load at the same time. In power distribution design, the maximum average value of 30 minutes is usually used as the basis for selecting electrical conductors according to heating conditions.
computing formula
The main calculation formulas are:
Active power: P30 = PE KD
Reactive power: q30 = p30 tan φ
Apparent power: S3O=P30/Cosφ
Calculated current: I30=S30/√3UN
Where: Kd is the demand coefficient, that is, the demand coefficient of the electrical equipment group, which is the ratio of the maximum load of the electrical equipment group for half an hour to its equipment capacity.
Cosφ is the average power factor of the electrical equipment group, Un is the rated voltage of the electrical equipment group, and Pe is the equipment capacity.