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( 800 / 2) 3 800 3/2 V<br />
V ff 1 rms =<br />
=<br />
; V ff 3 rms = 0 V ;<br />
V ff 5 rms =100<br />
3 / 2<br />
V<br />
V ffrms<br />
=<br />
2<br />
800 (3/ 2) + 100 (3/ 2) = 987,4<br />
2<br />
V<br />
Reaktansi beban per fasa untuk tiap komponen<br />
X 1 = 2π × 50 × 0,1 = 31,42 Ω ; X 3 = 3X<br />
1 = 94,25 Ω ;<br />
X 5 = 5X<br />
1 = 157,08 Ω<br />
Impedansi beban per fasa untuk tiap komponen<br />
Z f 1<br />
=<br />
2 2<br />
20 + 31,42<br />
= 37,24 Ω<br />
Z f 3<br />
=<br />
2 2<br />
20 + 94,25<br />
= 96,35 Ω<br />
Z f 5<br />
=<br />
2 2<br />
20 + 157,08<br />
= 158,35 Ω<br />
Arus fasa:<br />
V ff 1rms<br />
800 3 / 2<br />
I f 1 rms = = =<br />
Z 37,24<br />
f 1<br />
V ff 3rms<br />
I f 3 rms = =<br />
Z f 1<br />
0 A<br />
V ff 5rms<br />
100 3 / 2<br />
I f 5 rms = = =<br />
Z 158,35<br />
f 5<br />
26,3 A<br />
0,77<br />
A<br />
I<br />
frms<br />
=<br />
26,3<br />
2<br />
+ 0,77<br />
2<br />
= 26,32<br />
A<br />
Daya nyata diserap beban<br />
P<br />
b<br />
2<br />
= 3×<br />
I<br />
frms<br />
× 20 = 41566 W ≈ 41,6 kW<br />
Daya kompleks beban<br />
S<br />
b<br />
3×<br />
V × I = 3×<br />
987,4×<br />
26,32 = 77967 W ≈ 78 kW<br />
= ff f<br />
Faktor daya beban<br />
190 Sudaryatno Sudirham, <strong>Analisis</strong> <strong>Rangkaian</strong> Listrik (3)
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