From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 1370/CH3/EX3.8/example3_8.sce | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100755 1370/CH3/EX3.8/example3_8.sce

(limited to '1370/CH3/EX3.8/example3_8.sce')

diff --git a/1370/CH3/EX3.8/example3_8.sce b/1370/CH3/EX3.8/example3_8.sce
new file mode 100755
index 000000000..4e5762880
--- /dev/null
+++ b/1370/CH3/EX3.8/example3_8.sce
@@ -0,0 +1,24 @@
+//example3.8
+clc
+disp("The given values are, V1=200 V, V2=400 V, S=4 kVA, (R_1e)=0.15 ohm, P1= 60 W")
+k=4/2
+disp(k,"K=400/200=")
+r=(2^2)*0.15
+disp(r,"Therefore, (R_2e)[in ohm]=(K^2)(R_1e)=")
+i=4000/400
+disp(i,"I2(FL)[in A]=(kVA)/V2=")
+disp("i) Total copper losses on full load,")
+p=(10^2)*0.6
+disp(p,"(P_cu)(FL)[in W]=[I2(FL)]^2 * (R_2e) =(10^2)*0.6 =")
+disp("ii) cos(psi)=0.9 lagging and full load")
+disp("Therefore, %n = [(VA rating cos(psi))/(VA rating cos(psi)+(P_i)+(P_cu)FL)]*100")
+n=(4*0.9*10^5)/((4*0.9*10^3)+60+60)
+format(6)
+disp(n,"Therefore, n(% efficiency)=(4*0.9*10^3)/((4*0.9*10^3)+60+60) * 100 =")
+disp("iii) cos(psi)=0.8 leading, half load")
+disp("As half load, n=0.5")
+p=(0.5^2)*60
+disp(p,"(P_cu)(HL)[in W]=(n^2)*[(P_cu)(FL)]=(10.5^2)*60 =")
+disp("Therefore, %n = [n*(VA rating cos(psi))/(n*VA rating cos(psi)+(P_i)+(P_cu)FL)]*100")
+n=(4*0.5*0.8*10^5)/((4*0.8*0.5*10^3)+60+15)
+disp(n," = ")
-- 
cgit