A plant has 500 KVA transformer Operating Near Capacity. It draw 480 KVA or 578 amperes at 480 Volts. The presetn power factor is 75%, so the actual working power available is 360 KW.
It is desired to increase production by 25%, which means that about 450 KW output must be obtained. How is this accomplished?
A new transformer would be rated at 600 KVA to handle 75% power factor load. More loikely, the next size standard rating would be needed (630 KVA)
Perhaps a better solution would be to improve the power factor and release enough capacity to accommodate the increased load.
The correct 450 KW from 75% to 95%, power factor requires
450 x 0.533 ( from table) = 248.8 kvar.
