blob: 78eb2ca493e9d070de0cec7689f6ff4467e2023e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
// Example 6.4
// Computation of (a) Motor line current and motor phase current (b) Motor line
// current and motor phase current if one line opens (c) Line and phase
// currents if the power factor when single phasing is 82.0 percent.
// Page No. 274
clc;
clear;
close;
// Given data
Vline=2300; // Line voltage
Fp3ph=3; // Frequency of three phase
PF=0.844; // Power factor
PF1=0.820; // 82.2 percent power factor
Pin=350*746/(0.936*2); // Input power
// (a) Motor line current and motor phase current
Iline3ph=Pin/(sqrt(3)*Vline*PF);
Iphase3ph=Iline3ph;
//(b) Motor line current and motor phase current if one line opens
Iline1ph=(sqrt(3)*Iline3ph*PF)/PF;
Iphase1ph=Iline1ph;
// (c) Line and phase currents if the power factoe when single phasing is 82.0 percent.
Iline=(Iline1ph*PF)/PF1;
Iphase=Iline;
// Display result on command window
printf("\n Motor line current = %0.1f A ",Iline3ph);
printf("\n Motor phase current = %0.1f A ",Iphase3ph);
printf("\n Motor line current if one line opens = %0.1f A ",Iline1ph);
printf("\n Motor phase current if one line opens = %0.1f A ",Iphase1ph);
printf("\n Line current if the power factor is 82.0 percent = %0.1f A",Iline);
printf("\n Phase current if the power factor is 82.0 percent = %0.1f A ",Iphase);
|
