1 files changed, 64 insertions, 0 deletions
diff --git a/Principles_of_Power_System/chapter20_1.ipynb b/Principles_of_Power_System/chapter20_1.ipynb
new file mode 100644
index 00000000..768f8fa6
--- /dev/null
+++ b/Principles_of_Power_System/chapter20_1.ipynb
@@ -0,0 +1,64 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:37bb87f048a2d4a670b09cf05bff6f5c622ef838c4da8caa7225a316e1b26b5e"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 20: Fuses"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 20.1, Page Number: 495"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from __future__ import division\n",
+      "\n",
+      "#Variable declaration:\n",
+      "r1 = 0.8                   #radius of fuse wire(mm)\n",
+      "I1 = 8                     #blow current at r1 radius(A)\n",
+      "I2 = 1                     #blow current(A)\n",
+      "\n",
+      "\n",
+      "#Calculation:\n",
+      "r2 = r1*(I2/I1)**(2/3)       #radius for bearing 1 A of blow current(mm)\n",
+      "\n",
+      "\n",
+      "\n",
+      "#Result:\n",
+      "print \"The radius of the wire that will blow off at a current of 1A is\",r2,\"mm\""
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The radius of the wire that will blow off at a current of 1A is 0.2 mm\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file