The only drawback to unity power is the cost in getting there. Those costs need to be compared to the expenses occurred in paying for the reactive power not being utilized. Power factors can be tightly controlled with modern bank switching units, if they are working correctly. If they are not monitored for proper operation, one could be double dipping in the negative side of cash flow.Practically speaking, is there any drawbacks of unity power factor? I have seen firms maintaining there power factor to strictly to 0.95, why is it so ??
Not all. My last unit was about 0.98 pf. It was carefully designed to be a balanced load to the utility. On one set of equipments we had power factor correcting capacitors and I know of a similar unit "helping" a utility company by removing some of those pf capacitors to even the load at the utility's generating plant.Any firm claiming 0.95 or higher is in essence claiming how wonderful they are...and green...and lean...and low carbon footprint...and rich as all this stuff is expensive.
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