Question

Q.3 Three loads are connected in parallel as shown in Fig. 3. The voltage across the load terminal is given as: $V_L = 230 \angle 0^\circ$ V rms at 50Hz. The power consumed by each of these loads is as follow: Load 1: 10 kW active power and lagging 10 kVAR Load 2: 7 kW active power and leading 5 kVAR Load 3: 3 kW active power and 0 kVAR (a) Find the rms value of the source current ($I_s$) (b) Find the power factor of the three combined ($pf_L$) (c) Find the rms value of the source voltage ($V_s$) (b) Find the power factor of the source ($pf_s$) j0.1? 0.1? $i_s$ + $V_s$ + $V_L$ Load1 Load2 Load3 Figure 3

          Q.3 Three loads are connected in parallel as shown in Fig. 3. The voltage across
the load terminal is given as: $V_L = 230 \angle 0^\circ$ V rms at 50Hz. The power
consumed by each of these loads is as follow:
Load 1:
10 kW active power and lagging 10 kVAR
Load 2:
7 kW active power and leading 5 kVAR
Load 3:
3 kW active power and 0 kVAR
(a) Find the rms value of the source current ($I_s$)
(b) Find the power factor of the three combined ($pf_L$)
(c) Find the rms value of the source voltage ($V_s$)
(b) Find the power factor of the source ($pf_s$)
j0.1?
0.1?
$i_s$
+
$V_s$
+
$V_L$
Load1
Load2
Load3
Figure 3

Q.3 Three loads are connected in parallel as shown in Fig. 3. The voltage across
the load terminal is given as: VL = 230 ∠ 0^∘ V rms at 50Hz. The power
consumed by each of these loads is as follow:
Load 1:
10 kW active power and lagging 10 kVAR
Load 2:
7 kW active power and leading 5 kVAR
Load 3:
3 kW active power and 0 kVAR
(a) Find the rms value of the source current (Is)
(b) Find the power factor of the three combined (pfL)
(c) Find the rms value of the source voltage (Vs)
(b) Find the power factor of the source (pfs)
j0.1?
0.1?
is
+
Vs
+
VL
Load1
Load2
Load3
Figure 3

Added by Bobby G.

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