The required coefficient is a parameter used by the measurement circuit to calculate the current. The selection is based on the nature of the power load, operating shifts, etc., and will not be fixed. It has nothing to do with power factor, apparent power, active power, or rated power.
The demand coefficient is a comprehensive coefficient, which indicates the ratio of the actual power drawn from the power supply network to the power of the electrical equipment group when the electrical equipment group is put into operation.
Kd=Pm / Pe
Where Pm is the maximum active load (kW) on the load curve of the electrical equipment group
Pe is the equipment of the electrical equipment group Capacity (kW)
The physical meaning is:
Kd=(K∑ * KL)/η1ηr1
In the formula - the same period coefficient. Not all devices in a consumer group are running at the same time. The ratio of the capacity of the electrical equipment operating at the maximum load of the equipment group to the total capacity of the electrical equipment of the group is the synchronization coefficient, K∑ <1.
——Load factor. Working electrical equipment generally does not operate at full load. When the equipment group is at maximum load, the ratio of the actual power required by the working electrical equipment to the total power of the working electrical equipment is called the load factor, KL<1.
——Line power supply efficiency. The ratio of the power at the end of the line to the power at the beginning. Generally it is 0.95~0.98.
——The efficiency of electrical equipment at actual operating power, ηr1<1.
In fact, the above coefficients are difficult to determine for groups of electrical equipment, not to mention the operator's proficiency, material supply, tool quality and other random factors, which all have an impact. Therefore, it can only be determined by measurement statistics.