1 files changed, 28 insertions, 0 deletions
diff --git a/3472/CH33/EX33.1/Example33_1.sce b/3472/CH33/EX33.1/Example33_1.sce
new file mode 100644
index 000000000..7f4cc386f
--- /dev/null
+++ b/3472/CH33/EX33.1/Example33_1.sce
@@ -0,0 +1,28 @@
+// 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 7: PROTECTIVE RELAYS
+
+// EXAMPLE : 7.1 :
+// Page number 595-596
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+I_setting = 150.0   // Current setting of IDMT(%)
+t_mult = 0.5        // Time multiplier setting
+ratio_CT = 500.0/5  // CT ratio
+CT_sec = 5.0        // Secondary turn
+I_f = 6000.0        // Fault current
+
+// Calculations
+I_sec_fault = I_f/ratio_CT                // Secondary fault current(A)
+PSM = I_sec_fault/(CT_sec*I_setting/100)  // Plug setting multiplier
+t = 3.15                                  // Time against this PSM(sec). From graph E7.1 in textbook page no 595
+time_oper = t*t_mult                      // Operating time(sec)
+
+// Results
+disp("PART III - EXAMPLE : 7.1 : SOLUTION :-")
+printf("\nTime of operation of the relay = %.3f sec", time_oper)