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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3472/CH33/EX33.4/Example33_4.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
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initial commit / add all books
Diffstat (limited to '3472/CH33/EX33.4/Example33_4.sce')
| -rw-r--r-- | 3472/CH33/EX33.4/Example33_4.sce | 35 |
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diff --git a/3472/CH33/EX33.4/Example33_4.sce b/3472/CH33/EX33.4/Example33_4.sce new file mode 100644 index 000000000..a4e6e3e6c --- /dev/null +++ b/3472/CH33/EX33.4/Example33_4.sce @@ -0,0 +1,35 @@ +// 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 : 7.4 :
+// Page number 596-597
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+I_f = 2000.0 // Fault current(A)
+ratio_CT = 200.0/1 // CT ratio
+R_1 = 100.0 // Relay 1 set on(%)
+R_2 = 125.0 // Relay 2 set on(%)
+t_margin = 0.5 // Discriminative time margin(sec)
+TSM_1 = 0.2 // Time setting multiplier of relay 1
+
+// Calculations
+CT_sec = 200.0 // CT secondary
+PSM_1 = I_f*100/(CT_sec*R_1) // PSM of relay 1
+t_1 = 2.8 // Time against this PSM(sec). From graph E7.1 in textbook page no 595
+time_oper_1 = TSM_1*t_1 // Operating time of relay with TSM of 0.2(Sec)
+PSM_2 = I_f*100/(CT_sec*R_2) // PSM of relay 2
+t_2 = 3.15 // Time against this PSM(sec). From graph E7.1 in textbook page no 595
+actual_time_2 = time_oper_1+t_margin // Actual time of operation of relay 2(sec)
+TSM_2 = actual_time_2/t_2 // Time setting multiplier of relay 2
+
+// Results
+disp("PART III - EXAMPLE : 7.4 : SOLUTION :-")
+printf("\nTime of operation of relay 1 = %.2f sec", time_oper_1)
+printf("\nActual time of operation of relay 2 = %.2f sec", actual_time_2)
+printf("\nT.S.M of relay 2 = %.4f", TSM_2)
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