- #1
DT71
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Homework Statement
A factory's electrical load can be represented as 3 parallel admittances. The values of the admittances are in polar form:Y1=0.05-30degS;Y2=0.07-60degS and Y3=0.1-45degS
a)determine
i)the current taken from the supply
ii)the overall p.f. of the load
iii)the value of the capacitor required in parallel to the load to reduce the supply current by 20% and the new p.f. with the capacitor in circuit
Homework Equations
Y^2=G^2+B^2
phase angle=arctan(B/G)
The Attempt at a Solution
i) I have completed this and convinced its correct I=95-46.37deg Amps
ii)Can I use the 46.37 degrees to work out the overall p.f.?
iii)I=95 x 0.8=76 A
Y=I/V to obtain a new value for Y
Y^2=G^2+B^2 to obtain a new value for B, as G remains the same.
any assistance would be appreciated.