// A Texbook on POWER SYSTEM ENGINEERING // A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar // DHANPAT RAI & Co. // SECOND EDITION // PART II : TRANSMISSION AND DISTRIBUTION // CHAPTER 7: UNDERGROUND CABLES // EXAMPLE : 7.12 : // Page number 219 clear ; clc ; close ; // Clear the work space and console // Given data c = 0.3 // Capacitance b/w any 2 conductor & sheath earthed(µF/km) l = 10.0 // Length(km) V = 33.0 // Line Voltage(kV) f = 50.0 // Frequency(Hz) // Calculations C_eq = l*c // Capacitance b/w any 2 conductor & sheath earthed(µF) C_p = 2.0*C_eq // Capacitance per phase(µF) kVA = V**2*2*%pi*f*C_p/1000.0 // Three-phase kVA required(kVA) // Results disp("PART II - EXAMPLE : 7.12 : SOLUTION :-") printf("\nEquivalent star connected capacity, C_eq = %.f µF", C_eq) printf("\nkVA required = %.1f kVA", kVA)