Exercise 1
A house has a breaker of 150A. The usage of the energy for the 4 weeks on the month of march
is presented in the table below.
Home Appliance
TV 1
TV 2
Refrigerator
Air conditioner 1
Air conditioner 2
Air conditioner 3
Lampe 1
Lampe 2
Lampe 3
Washing machine
Dryer
Power W Saturday Sunday
60
10
6
120
0
0
50
24
24
1995
24
24
1995
6
6
2500
6
1
30
15
10
30
15
10
10
15
10
200
2
0
3500
3
0
Usage H/ day
Monday Tuesday Wednesday Thursday
6
6
6
6
0
0
0
0
24
24
24
24
24
24
24
24
6
6
6
6
1
1
1
1
10
10
10
10
10
10
10
10
10
10
10
10
0
1
0
0
0
1
0
0
Q1) According to the Saudi Electricity Company policy calculate the fixed bill fees for this month
Q2) Calculate the total energy consumption for this month
Q3) According to the Saudi Electricity Company policy calculate the total ( fixed and current) bill
fees for this month
Exercise 2
The big mosque of Almajmaah has consumed 6500 kwh for the month of January. It has a
breaker of 350 A. Calculate the total bill According to the Saudi Electricity Company policy
Exercise3
Almajmaah university has a breaker of 350A.It has consumed 8000 kWh for the month of
march. Calculate the price of the current energy.
Exercise 4 ;
In the month of June, the Indian school of Al Majmaah has consumed 6500kwh. The school still
using a n electromechanical counter. Calculate the current bill if the school is using 150A
breaker.
Exercise 5 ;
1
Friday
10
2
24
24
12
6
15
15
15
0
0
In the month of November , the Sedir clinic of Al Majmaah has consumed 8000kwh. The clinic is
using an digital counter. Calculate the current bill is the clinic is using 250A breaker
Exercise 6 ;
Panda of Almajmmah has decided to choose the case 3 for the bill. Its daily power
consummation ( Saturday –Friday) is given in the table below.
A) Calculate the bill for the month of November if Panda has a breaker of 250A.
Hour am
Power (kW)
Hour pm
Power (kW)
1
10
1
30
2
10
2
30
3
10
3
30
4
10
4
30
5
10
5
30
6
10
6
30
7
10
7
30
8
10
8
20
9
20
9
20
10
20
10
10
11
30
11
10
12
30
12
10
.
B) If panda wants to be in the case 1 what is the monthly bill than?
Solutions
2
Exercise 1
A1) According to the Saudi Electricity Company policy, 100 ≤ breaker capacity(150A) < 200 that
gives fixed price of 15SAR
A2)The energy consumption for this month is given in this table :
Usage H/ day
Home
appliance
Power W Saturday
TV 1
60
10
TV 2
120
0
Refrigerator
50
24
Air
conditioner
1
1995
24
Air
conditioner
2
1995
6
Air
conditioner
3
2500
6
Lampe 1
30
15
Lampe 2
30
15
Lampe 3
10
15
Washing
machine
200
2
Dryer
3500
3
Sunday Monday Tuesday Wednesday Thursday Friday Hours Energy
6
6
6
6
6
10
50
3000
0
0
0
0
0
2
2
240
24
24
24
24
24
24
168
8400
24
24
24
24
24
24
168
335160
6
6
6
6
6
12
48
95760
1
10
10
10
1
10
10
10
1
10
10
10
1
10
10
10
1
10
10
10
6
15
15
15
17
80
80
80
42500
2400
2400
800
0
0
0
0
1
1
0
0
0
0
0
0
3
4
Total
600
14000
505260
E=505260Wh=505.260kWh a week
For the month of march the total energy will be
E=505.26*4= 2021,04kWh
Q3) According to the Saudi Electricity Company policy the current consumption is given in the
case 1 (residential)
The Current Price= 1000*5+1000*5+21.04*10
That gives : 10210,4 halala =102.1SAR
The total price = Current Price + fixed price
The total price =102.1+15=117.1SAR
Exercise 2
3
According to the Saudi Electricity Company policy 300 ≤ breaker capacity(350) < 400 gives a
fixed price of 22SAR.
According to the Saudi Electricity Company policy the current price is given by the case 1
(Charity).
E=6500 kWh
Energy (6500) Halala/kwh
1000
5
1000
5
1000
10
1000
10
1000
10
1000
12
500
12
Curent Total (halala)
Curent Total (SAR)
5000
5000
10000
10000
10000
12000
6000
58000
580
The total price = Current Price + fixed price
The total price = 580+22
The total price = 602SAR
Exercise3
According to the Saudi Electricity Company policy 300 ≤ the university breaker
capacity(350) < 400 gives a fixed price of 22SAR.
According to the Saudi Electricity Company policy the current price is given by the case 1
(governmental).
The current price = 8000*26/100=2060SAR
The total price = Current Price + fixed price
The total price = 2060+22
The total price = 2082 SAR
Exercise 4
4
According to the Saudi Electricity Company policy, 100 ≤ breaker capacity(150A) < 200 that
gives fixed price of 15SAR
According to the Saudi Electricity Company policy, the school is the case 2 ( Private educational
facilities )
The current price = 6500*15/100=975SAR
The total price = Current Price + fixed price
The total price = 975+22
The total price = 997 SAR
Exercise 5
According to the Saudi Electricity Company policy, 200 ≤ breaker capacity(250A) < 300 that
gives fixed price of 21SAR
According to the Saudi Electricity Company policy, the school is the case 2 ( Private medical
facilities )
The current price = 8000*12/100=960SAR
The total price = Current Price + fixed price
The total price = 960+21
The total price = 981 SAR
Exercise 6
5
According to the Saudi Electricity Company policy, 200 ≤ breaker capacity(250A) < 300 that
gives fixed price of 21SAR
According to the Saudi Electricity Company policy, panda has chosen to be in the case 3 ( Time
of use) the pick time is presented in the table below
Hour am
Power (kW)
Hour pm
Power (kW)
1
10
1
30
2
10
2
30
3
10
3
30
4
10
4
30
5
10
5
30
6
10
6
30
7
10
7
30
8
10
8
20
9
20
9
20
10
20
10
10
11
30
11
10
12
30
12
10
10*11+20*4+30*3=
Calculation of the pick time energy consumption
pick time energy=300*6=180 kwh /day
pick time energy=180*6 =1080kwh /week
pick time energy=1080*4=4320 kwh per month
The cost of the pick energy=4320*65/100= 2721,6 SAR
Calculation of the off pick time energy consumption
Off pick time energy consumption=10*11+20*4+30*3=280kWh ( for Saturday to Thursday )
Off pick time energy consumption=10*11+20*4+30*9=460 kWh for Friday
Off pick time energy consumption=(280*6+460)=2140kwh per week
Off pick time energy consumption==2140*4=8560kwh per month
The cost of the off pick energy=8560*17/100=1455.2 AR
Finally :
6
The bill= the fixed price+ the cost of the pick energy+ the cost of the off pick energy
The Bill=21+2721,6+1455.2
The Bill= 4197,8SAR
B) if Panda has chosen to be in the case 1:
Calculation of the energy consumption
The energy consumption=10*11+20*4+30*9=460kwh per day
The energy consumption=460*7=3220kwh per week
The energy consumption=3220*4=12880kwh per month
The price is given according to the case 1 as fellow:
X12halala
X20halala
X 26 halala
Total (SAR)
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
2880
12000
12000
12000
12000
20000
20000
20000
20000
26000
26000
74880
2548,8
The total price = Current Price + fixed price
The total price = 21+2548.8
The total price = 2569,8
7