Load Schedule

To simplify conservatively, you could choose the most adverse case, namely 0.8. Otherwise, a weighted average will be somewhat more favorable. See previous.

Hints: From the power factor (p.f) and the KW of each load, find the KVAR of each load. Then find the sum of all the KWs and sum of all the KVARs. From total KW and KVAR, find the resultant power factor.

Note: This should be enough for some one who knows the relation between KW, KVAR, p.f and KVA.

- MS

The power factor to be maintained is the minimum value approved by the power supplier with out penalty which varies with the supplier. The most desirable value of Pf is unity as KVA will be equal to KW and KVAR will be zero. Most of the power load being inductive and result in low pf. To improve pf you have to add capactor in the circuit. To maintain the the pf value nearer to unity large capacitor units have to be added and that will not be constant . It is adviceable to use automatic pf correction unit (APFC panel) to be added to system with appropriate pf settings .

PF of a mixed load depends upon the diversity and load factor and is time dependant. Best way is to install a logger/recorder and plot the graph and take the maximum,minimum and average or mean value depending on the purpose.