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Power Factor Correction

Power Factor Correction. KW KVA KVAR. Power Factor is the ratio between Power and Apparent Power Motors. Reasons behind P.F corrections. P.F = watts/va Or P.F = P/S. Formula P.F. Power Factor Improvement. Over Correction Individual power factor correction. Power Factor Improvement.

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Power Factor Correction

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  1. Power Factor Correction KW KVA KVAR

  2. Power Factor is the ratio between Power and Apparent Power Motors Reasons behind P.F corrections

  3. P.F = watts/va Or P.F = P/S Formula P.F

  4. Power Factor Improvement • Over Correction • Individual power factor correction

  5. Power Factor Improvement • Group power factor correction

  6. centralized automatic power factor correction Utility P.F Correction

  7. Common Types of Capacitors

  8. 3 Phase Capacitor

  9. Shunt Reactors Series Reactors Reactors

  10. Edmonton downtown network Calgary downtown network Underground Networks

  11. Reduce electrical costs. Reduce load losses of the distribution system. I²R Loss Increase the system's capacity. Maintain a better voltage regulation on the system. Improves P.F. Benefits of Power Factor Correction

  12. Capacitors hold charges High Quality Capacitors Capacitors in transit Safety

  13. Rules for P.F Calculations • Power input in a load is what the utility see as load • P= KW or W

  14. Power is constant KW or Watts Output power is what the customer sees KW or Watts Rules

  15. Cal. All Power Values @ original P.F 1st SmPmQm Cal. All Power Values @ New P.F (corrected p.f) Using Pm – constant Scor and Qcor or Delivered Rules

  16. Find the Qreq or the Q of the cap required to correct the P.F Qcap = Qm - Qcor Cal Size of Cap’s Xc value Xc = E²/Qcap Rules

  17. Cal the Cap size to μF C=1 x 106 / 2п f Xc Assume 60 Hz Rules

  18. Size the cap for total bank size if required per individual cap divide by 3 Remember Power is always constant Rules Qt = √S² - P²

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