Question

3.8 Shown in figure are the areas normally served by two 0.5 mile 0.5 mile S" 0.5 mile 0.75 mile 0.5 mile 1.5 mile Under an emergency condition, the switch at b is must now serve both areas. lagging power factor. The primary feeder voltage is 13.8 kV. Latera main from S to a. No loads are tapped off of the feed from a to b to c, and laterals are tapp from c to S. The primary main conductors are 2/0 ACSR and are placed on a pole such that D closed so that the feeder normally serving the triangle area Assume both areas have a uniform load density of 2.5 MVA/square mile and 0.9 Is are uniformly tapped off of the primary ed off from c to dand 43795 ft. a. Determine the Kdrop and Krise factors. b. Determine the voltage drop to point d c. Determine the three-phase kvar rating of a shunt capacitor bank placed at c to limit the voltage drop to point d to be 3.0%. d. Determine the voltage drop to e with the capacitor bank at c. e. Determine the voltage drop to e with the source at S' and the capacitor at c.

Answer 1

le vsse - 55. 25'j kvar -5.osl b.0953 X1.5 ク 55.os.j. 0.55 26 b. tu 295 hvov