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+//Problem 20.27: A three-phase transformer has 500 primary turns and 50 secondary turns. If the supply voltage is 2.4 kV find the secondary line voltage on no-load when the windings are connected a) star-delta, (b) delta-star.
+
+//initializing the variables:
+N1 = 500; // prim turns
+N2 = 50; // sec turns
+VL = 2400; // in Volts
+
+//calculation:
+//For a star-connection, VL = Vp*(3^0.5)
+VL1s = VL
+//Primary phase voltage
+Vp1s = VL1s/(3^0.5)
+//For a delta-connection, VL = Vp
+//N1/N2 = V1/V2, from which,
+//secondary phase voltage, Vp2s
+Vp2s = Vp1s*N2/N1
+VL2d = Vp2s
+
+//For a delta-connection, VL = Vp
+VL1d = VL
+//primary phase voltage Vp1d
+Vp1d = VL1d
+//Secondary phase voltage, Vp2d
+Vp2d = Vp1d*N2/N1
+//For a star-connection, VL = Vp*(3^0.5)
+VL2s = Vp2d*(3^0.5)
+
+printf("\n\n Result \n\n")
+printf("\n the secondary line voltage for star and delta connection are %.0f V and %.1f V respectively", VL2s, VL2d)
+\ No newline at end of file