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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 22: INSULATION COORDINATION"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 22.1: Highest_voltage_to_which_the_transformer_is_subjected.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// A Texbook on POWER SYSTEM ENGINEERING\n",
+"// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar\n",
+"// DHANPAT RAI & Co.\n",
+"// SECOND EDITION \n",
+"\n",
+"// PART II : TRANSMISSION AND DISTRIBUTION\n",
+"// CHAPTER 15: INSULATION CO-ORDINATION\n",
+"\n",
+"// EXAMPLE : 15.1 :\n",
+"// Page number 398-399\n",
+"clear ; clc ; close ; // Clear the work space and console\n",
+"\n",
+"// Given data\n",
+"L = 30.0          // Height of arrester located(m)\n",
+"BIL = 650.0       // BIL(kV)\n",
+"de_dt = 1000.0    // Rate of rising surge wave front(kV/µ-sec)\n",
+"V = 132.0         // Transformer voltage at HV side(kV)\n",
+"E_a = 400.0       // Discharge voltage of arrester(kV)\n",
+"v = 3.0*10**8     // Velocity of surge propagation(m/sec)\n",
+"\n",
+"// Calculations\n",
+"E_t = E_a+(2.0*de_dt*L/300)   // Highest voltage the transformer is subjected(kV)\n",
+"\n",
+"// Results\n",
+"disp('PART II - EXAMPLE : 15.1 : SOLUTION :-')\n",
+"printf('\nHighest voltage to which the transformer is subjected, E_t = %.f kV', E_t)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 22.2: Rating_of_LA_and_Location_with_respect_to_transformer.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// A Texbook on POWER SYSTEM ENGINEERING\n",
+"// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar\n",
+"// DHANPAT RAI & Co.\n",
+"// SECOND EDITION \n",
+"\n",
+"// PART II : TRANSMISSION AND DISTRIBUTION\n",
+"// CHAPTER 15: INSULATION CO-ORDINATION\n",
+"\n",
+"// EXAMPLE : 15.2 :\n",
+"// Page number 399\n",
+"clear ; clc ; close ; // Clear the work space and console\n",
+"\n",
+"// Given data\n",
+"V_hv = 132.0      // Voltage at the HV side of transformer(kV)\n",
+"V_lv = 33.0       // Voltage at the LV side of transformer(kV)\n",
+"V = 860.0         // Insulator allowable voltage(kV)\n",
+"Z = 400.0         // Line surge impedance(ohm)\n",
+"BIL = 550.0       // BIL(kV)\n",
+"\n",
+"// Calculations\n",
+"V_rating_LA = V_hv*1.1*0.8                 // Voltage rating of LA(kV)\n",
+"E_a = 351.0                                // Discharge voltage at 5 kA(kV)\n",
+"I_disc = (2*V-E_a)*1000/Z                  // Discharge current(A)\n",
+"L_1 = 37.7                                 // Separation distance in current b/w arrester tap and power transformer tap(m)\n",
+"dist = 11.0                                // Lead length from tap point to ground level(m)\n",
+"de_dt = 500.0                              // Maximum rate of rise of surge(kV/µ-sec)\n",
+"Inductance = 1.2                           // Inductance(µH/metre)\n",
+"di_dt = 5000.0                             // di/dt(A/µ-sec)\n",
+"lead_drop = Inductance*dist*di_dt/1000     // Drop in the lead(kV)\n",
+"E_d = E_a+lead_drop                        // (kV)\n",
+"V_tr_terminal = E_d+2*de_dt*L_1/300        // Voltage at transformer terminals(kV)\n",
+"E_t = BIL/1.2                              // Highest voltage the transformer is subjected(kV)\n",
+"L = (E_t-E_a)/(2*de_dt)*300                // Distance at which lightning arrester located from transformer(m)\n",
+"L_lead = (E_t-E_a*1.1)/(2*de_dt)*300       // Distance at which lightning arrester located from transformer taken 10% lead drop(m)\n",
+"\n",
+"// Results\n",
+"disp('PART II - EXAMPLE : 15.2 : SOLUTION :-')\n",
+"printf('\nRating of L.A = %.1f kV', V_rating_LA)\n",
+"printf('\nLocation of L.A, L = %.f m', L)\n",
+"printf('\nLocation of L.A if 10 percent lead drop is considered, L = %.1f m', L_lead)\n",
+"printf('\nMaximum distance at which a ligtning arrester is usually connected from transformer is %.f-%.f m', L-2,L+3)"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}