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Homework Statement:

calculate the capacitive reactance/ph such that the load power factor
is increased to 0.98 lag
Relevant Equations:
 1/2πfC or 1/ωt
the full question is:
The following phase schematic diagram (FIGURE 4) shows an 11 kV, 50 Hz, 3phase, short line feeding a load. By calculation or constructing the phasor diagram (use a scale of 1 mm = 2 A) for the load current with VR as reference, determine the capacitive current and
• calculate the capacitive reactance/ph such that the load power factor is increased to 0.98 lag
• calculate the percentage reduction in line current with this value of capacitive reactance in circuit.
So far i have got to:
p.f.=1.9/3.2=0.59
Il=(3.2*10^6)/(√3*11*10^3*0.59 )=284∟53.8
=167.7j229.2
unsure which way to go next..
The following phase schematic diagram (FIGURE 4) shows an 11 kV, 50 Hz, 3phase, short line feeding a load. By calculation or constructing the phasor diagram (use a scale of 1 mm = 2 A) for the load current with VR as reference, determine the capacitive current and
• calculate the capacitive reactance/ph such that the load power factor is increased to 0.98 lag
• calculate the percentage reduction in line current with this value of capacitive reactance in circuit.
So far i have got to:
p.f.=1.9/3.2=0.59
Il=(3.2*10^6)/(√3*11*10^3*0.59 )=284∟53.8
=167.7j229.2
unsure which way to go next..
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