From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

---
 3574/CH5/EX5.8/EX5_8.sce | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 3574/CH5/EX5.8/EX5_8.sce

(limited to '3574/CH5/EX5.8/EX5_8.sce')

diff --git a/3574/CH5/EX5.8/EX5_8.sce b/3574/CH5/EX5.8/EX5_8.sce
new file mode 100644
index 000000000..915351ce4
--- /dev/null
+++ b/3574/CH5/EX5.8/EX5_8.sce
@@ -0,0 +1,29 @@
+// Example 5.8
+// Determine (a) Expected minimum locked-rotor torque (b) Repeat (a) when 
+// voltage and frequency dropped to 230V and 58Hz  
+// Page No. 193
+
+clc;
+clear;
+close;
+
+// Given data
+HPrated=75;            // Rated horsepower
+nrated=1750;           // Rated speed
+V1=240;                // Rated voltage
+V2=230;                // Voltage after drop
+F1=60;                 // Rated frequency
+F2=58;                 // Frequency after drop
+
+// (a) Expected minimum locked-rotor torque
+Trated=5252*HPrated/nrated;   // Rated torque
+Tlr=Trated*1.2;               // Minimum locked-rotor torque is 120% rated 
+
+// (b) Expected minimum locked-rotor torque when voltage and frequency dropped 
+// to 230V and 58Hz  
+Tlr2=Tlr*((V2/F2)^2)*((F1/V1)^2);
+
+// Display result on command window
+printf("\n Expected minimum locked-rotor torque = %0.0f lb-ft",Tlr);
+printf("\n Expected minimum locked-rotor torque after drop = %0.0f lb-ft",Tlr2);
+
-- 
cgit