Distribution Power Transformer capacity = total capacity of electrical equipment × simultaneous rate / power factor of electrical equipment × efficiency of electrical equipment
Example: In a factory, the total capacity of electrical equipment is 700KVA, and the actual consumption is 600KVA. Find the capacity of the power transformer.
At the same time, the power is 600KVA÷700KVA=0.86, and the power transformer capacity=(700×0.86)/(cosΦ=0.85×0.85)=600/0.722=830KVA.
Note: If the power factor is 0.95 and the efficiency is 0.9, its capacity is: Distribution Power Transformer capacity=(700×0.7)/(cosΦ=0.95×n=0.9)=490/0.855=576KVA, such as: power factor=0.7, n =0.9 The simultaneous rate is 0.75, find the capacity.
Power transformer capacity=(700KVA×0.75)/(0.7×0.9)=525/0.63=833KVA.
It can be seen that the lower the power factor, the greater the selection of Distribution Power Transformers, and vice versa, the power factor must be improved to achieve the purpose of energy saving and consumption reduction.