Saved Bookmarks
| 1. |
A 4500 VA load at power factor 0.75 is lagging is supplied by a 60 Hz source at effective voltage 240V. determine the parallel capacitance in microfarads necessary to improve the power factor to 0.90 leading |
|
Answer» 61.8 uFExplanation:Capacitance needed = P [ tan∅1 - tan∅2] / w(V²)cos ∅1 = 0.75 , ∅1 = 41.4°cos ∅2 = 0.9 , ∅2 = 25.84°Capacitance needed = 4500 [ tan 41.4 - tan 25.84 ] / (2 x Pi x 60 x 240²)Solving we GET, 61.8 UF |
|