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diff --git a/3472/CH34/EX34.8/Example34_8.sce b/3472/CH34/EX34.8/Example34_8.sce new file mode 100644 index 000000000..561a59f5d --- /dev/null +++ b/3472/CH34/EX34.8/Example34_8.sce @@ -0,0 +1,30 @@ +// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION
+
+// PART III : SWITCHGEAR AND PROTECTION
+// CHAPTER 8: PROTECTION OF ALTERNATORS AND AC MOTORS
+
+// EXAMPLE : 8.8 :
+// Page number 627
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+kV = 11.0 // Alternator voltage(kV)
+P = 100.0 // Alternator maximum rating(MW)
+PF = 0.8 // Power factor
+X = 0.1 // Reactance of alternator(pu)
+i = 500.0 // Current(A)
+per = 10.0 // Windings unprotected(%)
+
+// Calculations
+I = P*1000/(3**0.5*kV*PF) // Rated current of alternator(A)
+a = i/I // Relay setting
+I_n = a*I*100/per // Current through neutral(A)
+R = kV*1000/(3**0.5*I_n) // Magnitude of neutral earthing resistance(ohm)
+
+// Results
+disp("PART III - EXAMPLE : 8.8 : SOLUTION :-")
+printf("\nMagnitude of neutral earthing resistance, R = %.2f ohm\n", R)
+printf("\nNOTE: ERROR: Unit of resistance is not mentioned in textbook solution")
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