8. (10%) An industrial firm has two electrical loads connected in parallel across the power
source. Power is supplied to the fim at 5000 Vrms. One load is 30 kW of heating use,
and the other load is a set of motors that together operate as a load at 0.6 lagging power
factor and at 150 kVA.
【題組】
a. Determine the total current and the plant power factor.(5%)