Power Factor

Discussion in 'Off-Topic' started by Asad1, Nov 15, 2011.

  1. Asad1

    Thread Starter Member

    Feb 11, 2009
    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 ??
  2. jimkeith

    Well-Known Member

    Oct 26, 2011
    Unity power factor is the goal, but is impractical to achieve in most cases. 0.9 or better is very good. Tweaking it higher is not cost-effective as the power utility does provide further cost incentives--they penalize only the bad guys. Furthermore, it would require each and every load to be corrected or have expensive equipment to monitor and correct automatically.

    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.
    Asad1 likes this.
  3. GetDeviceInfo

    AAC Fanatic!

    Jun 7, 2009
    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.
    Asad1 likes this.
  4. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    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.

    It's not all about the carbon footprint. Carbon footprints were not in the vocabulary back then (80s and early 90s).