Electrical Engineering ⇒ Topic : Calculations of Power Factor Correction
Calculations of Power Factor Correction
From Figure 1 (a), the inductive load (R-L) originally takes current I from the source and its power factor is cos Φ1 i.e., I lags behind the voltage V by an angle Φ1 (Figure 1 (b)). Let a capacitor C be connected in parallel with R-L load. So, its current lc is leading in nature and it will partly cancel the reactive component of I and the current drawn by the source will be I' where I' < I and the power factor of the circuit becomes cos Φ2, where cos Φ2 > cos Φ1.
From Figure 1 (d)
From Figure (2), the reactive power supplied by the capacitor is
The desired result can be obtained if the kVA supplied by the p.f. correction equipment is known.
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