Consider the following monthly bill for a large industrial plant in Saudi Arabia: The load is connected at 220 V, 60 Hz supply. 940 900 period length (hours) Reactive power power (kW) (kVAR) 800 Period (hours) 20 780 740 Active 700 640 1-167 167 820 620 580 540 168-365 366-524 525-720 198 800 900 800 640 640 159 500 100 200 300 500 600 700 196 700 Hours Active power W) ---- Reactive power (VAR) a. Calculate the total bill in Saudi Riyal. b. Determine the power-factor capacitor that must be placed in parallel with the load to reduce the monthly bill in which reactive energy tariff is avoided. c. What is the minimum size of power-factor capacitor that must be placed in parallel with the load to reduce the monthly bill in which reactive energy tariff is avoided.

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1kWh =0.26 SAR (saudi Riyal )

Consider the following monthly bill for a large industrial plant in Saudi Arabia:
The load is connected at 220 V, 60 Hz supply.
940
900
period
length
(hours)
Reactive
power
power (kW) (kVAR)
800
Period
(hours)
20
780
740
Active
700
640
1-167
167
820
620
580
540
168-365
366-524
525-720
198
800
900
800
640
640
159
500
100
200
300
500
600
700
196
700
Hours
Active power W) ---- Reactive power (VAR)
a. Calculate the total bill in Saudi Riyal.
b. Determine the power-factor capacitor that must be placed in parallel with the load to
reduce the monthly bill in which reactive energy tariff is avoided.
c. What is the minimum size of power-factor capacitor that must be placed in parallel with the
load to reduce the monthly bill in which reactive energy tariff is avoided.
Transcribed Image Text:Consider the following monthly bill for a large industrial plant in Saudi Arabia: The load is connected at 220 V, 60 Hz supply. 940 900 period length (hours) Reactive power power (kW) (kVAR) 800 Period (hours) 20 780 740 Active 700 640 1-167 167 820 620 580 540 168-365 366-524 525-720 198 800 900 800 640 640 159 500 100 200 300 500 600 700 196 700 Hours Active power W) ---- Reactive power (VAR) a. Calculate the total bill in Saudi Riyal. b. Determine the power-factor capacitor that must be placed in parallel with the load to reduce the monthly bill in which reactive energy tariff is avoided. c. What is the minimum size of power-factor capacitor that must be placed in parallel with the load to reduce the monthly bill in which reactive energy tariff is avoided.
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