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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 /3802/CH7/EX7.7 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3802/CH7/EX7.7')
| -rw-r--r-- | 3802/CH7/EX7.7/Ex7_7.jpg | bin | 0 -> 53522 bytes | |||
| -rw-r--r-- | 3802/CH7/EX7.7/Ex7_7.sce | 44 |
2 files changed, 44 insertions, 0 deletions
diff --git a/3802/CH7/EX7.7/Ex7_7.jpg b/3802/CH7/EX7.7/Ex7_7.jpg Binary files differnew file mode 100644 index 000000000..96b2ca359 --- /dev/null +++ b/3802/CH7/EX7.7/Ex7_7.jpg diff --git a/3802/CH7/EX7.7/Ex7_7.sce b/3802/CH7/EX7.7/Ex7_7.sce new file mode 100644 index 000000000..7b7c06762 --- /dev/null +++ b/3802/CH7/EX7.7/Ex7_7.sce @@ -0,0 +1,44 @@ +//Book Name:Fundamentals of Electrical Engineering
+//Author:Rajendra Prasad
+//Publisher: PHI Learning Private Limited
+//Edition:Third ,2014
+
+//Ex7_7.sce
+clc;
+clear;
+KVA=50e3;
+
+printf("\n (a)")
+PF=0.7;
+iron_loss=430; //primary power of transformer on open circuit test in watt is called iron loss
+copper_loss_FL=525; //primary power of transformer on short circuit test in watt is called copper loss
+total_loss_FL=iron_loss+copper_loss_FL;
+eta_FL=(KVA*PF)/((KVA*PF)+total_loss_FL)*100; //full load efficiency
+printf("\n Full load efficiency for 0.7 power factor=%2.2f percentage \n",eta_FL)
+copper_loss_HL=(0.5^2)*copper_loss_FL;
+total_loss_HL=iron_loss+copper_loss_HL;
+eta_HL=(KVA*PF*0.5)/((KVA*0.5*PF)+total_loss_HL)*100;
+printf("\n Half load Efficiency for 0.7 power factor=%2.2f percentage \n",eta_HL)
+
+printf("\n (b)")
+Vsc=124; //primary voltage on short circuit test in volts
+Isc=15.3; //primary current on short circuit test in amphere
+Psc=525; //primary power of transformer on open circuit test in watt
+pi_e=acosd(Psc/(Vsc*Isc));
+pi_2=acosd(PF);
+Voc=3300;
+voltage_regulation1=Vsc*cosd(pi_e-pi_2)/(Voc)*100;
+printf("\n The voltage regulation for 0.7 lagging power factor=%1.1f percentage \n",voltage_regulation1)
+pi_2=-acosd(PF);
+voltage_regulation2=Vsc*cosd(pi_e-pi_2)/(Voc)*100;
+printf("\n The voltage regulation for 0.7 leading power factor=%1.2f percentage \n",voltage_regulation2)
+
+printf("\n (c)")
+Voc=400;
+decrease_in_voltage=voltage_regulation1*Voc/100;
+Vs1=Voc-decrease_in_voltage;
+increase_in_voltage=voltage_regulation2*Voc/100;
+Vs2=Voc-increase_in_voltage;
+printf("\n The secondary terminal voltage corresponding to 0.7 pf lagging=%3.1f V \n",Vs1)
+printf("\n The secondary terminal voltage corresponding to 0.7 pf leading=%3.1f V \n",Vs2)
+
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