Calculation of Required Kvar to Raise Power Factor

This web page can be used to calculate the kvar required to raise the power factor of a constant kw (real power) load. The initial power factor, desired power factor, and load kw are required for the calculation. 

A negative power factor is interpreted as a leading power factor. A positive power factor is considered a lagging power factor. A negative kvar value should be interpreted as capacitive kvar that shall be removed. A positive kvar value should be interpreted as capacitive kvar that shall be added.

Table 1 - Calculation of Required Kvar 

Known Variables: Initial or Present Power Factor, Desired Power Factor, and Real Power of Load

    where:

  = Initial Power Factor Angle

  = Final Power Factor Angle

Input Initial Power Factor
Input Desired Power Factor
Input Load KW (KW)
Calculated Results are below:
Required Kvar
Initial KVA 
Final KVA after addition/removal of capacitors.

Northeast Power Systems, Inc.
66 Carey Road
Queensbury, New York 12804
Phone: 518-792-4776
Fax: 518-792-5767

E-mail: sales@nepsi.com
Website: http://www.nepsi.com/