alfred p mtui 110343238385.docx
TRANSCRIPT
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DAR ES SALAAM INSTITUTE OF TECHNOLOGY
DEPARTMENT OF ELECTRICAL ENGINEERING
BACHELOR IN ELECTRICAL ENGINEERING
(NTA LEVEL 8)
SENIOR PROJECT 2
PROJECT TITTLE: FEASIBILITY STUDY OF
ELECTRIFYING MBAHE VILLAGE
PROJECT TYPE: CASE STUDY
NAME: ALFRED .P. MTUI
ADMISSION NO: 110343238385
SUPERVISER: DR.A. KILIMO
YEAR OF STUDY: 2013/2014
2014, MARCH
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DECLARATION
I,ALFRED. P .MTUI, declare that ,to the best of my knowledge the project presented here as a
part of the fulfillment for the award of Bachelor Of Engineering is a work of my origin .All
references used from books ,articles,reports,papers etc in preparation of this project have their
sources acknowledged in the reference list.
Signature..
Alfred. P. Mtui
May, 2014
Supervised by
Signature
Dr. A. Kilimo
May, 2014
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DEDICATION
I dedicate this project to my lovely parents, Mr. and Mrs. Pius Mtui, to my beloved sisters Flavia.
P. Mtui, Fides. P.Mtui and Glory. P.Mtui and my beloved brothers Lodigard.P.Mtui and
Innocent. Mtui, who were always in front way to give me support, Also I dedicate this to all my
friends.
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ABSTRACT
Mbahe village is located in Moshi Rural District 60 kM from MOSHI town in Kilimanjaro
region. Peoples living in this area have no access to electricity. It is about 4kM from the place
where an 11kV high tension line pass through to Kilimanjaro National Park (KINAPA).This
village experiences underdevelopment and low economy. So my plan is to perform a case study
for the possibility to electrify. Mbahe village by checking whether an 11kV line is viable to
supply the load of the village and if not the line will be upgraded to fulfill the load requirements
of the village.
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ACKNOWLEDGEMENT
I would like to express my gratitude thanks to my Supervisor Dr .A. Kilimo of Electrical
Engineering Department for his valuable guidance during the planning and implementing of this
project.
My deep appreciation goes to all staff members of Electrical Engineering Department for their
assistance towards making this project as successful one.
Im very grateful to my parents Mr. and Mrs. Pius. Mtui, my beloved sisters Flavia, Fides and
Glory. P. Mtui and my young brothers Lodigard and Innocent. P. Mtui for their support and
encouragement throughout my study period. Also I express my special thanks to my fellow
students and those who support me to accomplish this project.
Above all, thanks GOD for giving me life, strength and energy.
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TABLE OF CONTENTS
DECLARATION .......................................................................................................................................... ii
DEDICATION ............................................................................................................................................. iii
ABSTRACT ................................................................................................................................................. iv
ACKNOWLEDGEMENT ............................................................................................................................ v
TABLE OF CONTENTS ............................................................................................................................. vi
LIST OF TABLES ..................................................................................................................................... viii
ABBREVIATIONS ..................................................................................................................................... ix
CHAPTER ONE ........................................................................................................................................... 1
INTRODUCTION ........................................................................................................................................ 1
1.1: BACKGROUND ............................................................................................................................... 1
1.2: PROBLEM STATEMENT ................................................................................................................ 1
1.3: PROJECT OBJECTIVES .................................................................................................................. 1
1.3.1: MAIN OBJECTIVE................................................................................................................... 1
1.3.2. SPECIFIC OBJECTIVES ........................................................................................................... 2
1.4: SIGNIFICANCE OF THE PROJECT .............................................................................................. 2
1.5: PROJECT METHODOLOGY........................................................................................................... 2
CHAPTER TWO .......................................................................................................................................... 3
LITERATURE REVIEW ............................................................................................................................. 3
2.1.1. DIFFERENT TYPES OF LOAD ................................................................................................ 3
2.1.3. LOAD FORECAST. ................................................................................................................... 5
2.1.4. LOAD SURVEY METHODS .................................................................................................... 5
2.1.6. BALANCING OF PHASES ....................................................................................................... 7
2.1.7. PLANNING ................................................................................................................................ 8
2.1.8. TYPES OF CABLES AND MATERIALS .................................................................................. 10
2.1.9. OVERHEAD LINE CONDUCTOR AND SPECIFICATIONS .................................................. 10
2.2.1. CONDUCTOR SELECTION ....................................................................................................... 11
2.2.2. VOLTAGE REGULATION ....................................................................................................... 12
CHAPTER THREE .................................................................................................................................... 13
DATA COLLECTION ............................................................................................................................... 13
CHAPTER FOUR ....................................................................................................................................... 14
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DATA ANALYSIS ..................................................................................................................................... 14
4.1.1. Calculation of Substations capacity. ............................................................................................. 14
4.1.2. SELECTION OF TRANSFORMERS .......................................................................................... 15
4.1.3. PROPOSED ELECTRIFICATION MAP OF MBAHE VILLAGE ............................................. 16
4.1.4. COST ESTIMATES FOR CONSTRUCTION OF A 11KV HT LINE TO PROSPECTIVE ...... 17
4.1.5.COST ESTIMATES FOR ESTABLISHMENT OF POLE MOUNTED 315 kVA,11/0.4/0.23kV
................................................................................................................................................................ 18
4.1.6.COST ESTIMATES FOR CONSTRUCTION OF LT LINE TO SUPPLY POWER TO M/S
EXACT LINE AT MBAHE RC CHURCH AREA ................................................................................ 21
4.1.7.TOTAL COST TO FUND THE PROJECT .................................................................................. 23
CHAPTER FIVE ........................................................................................................................................ 24
CONCLUSION AND RECOMMENDATIONS ........................................................................................ 24
5.1: CONCLUSION ................................................................................................................................ 24
5.2: RECOMMENDATION ................................................................................................................... 24
APPENDIX A: WORK SCHEDULE ......................................................................................................... 25
REFERENCES ........................................................................................................................................... 26
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LIST OF TABLES
Table 1: Load Consumption .......................................................................................................................... 5
Table 2: TANESCO Electricity Charges ...................................................................................................... 8
Table 3: Tariffs ............................................................................................................................................. 9
Table 4: Load evaluation for assessed prospective customers .................................................................... 15
Table 5: Cost estimates for construction of 11kV HT line to prospective customers ................................. 17
Table 7:Cost estimates for construction of LT line to supply power to M/S exact line at Mbahe RC
Church area ................................................................................................................................................. 21
Table 8: Total cost to fund the project ........................................................................................................ 23
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CHAPTER ONE
INTRODUCTION
1.1: BACKGROUND
Tanzania Electric Supply Company (TANESCO) is the utility company that deals with the
Generation, Transmission, Distribution and Sale of electrical energy in the Country. In Tanzania
only 15 percent of the countrys total populations of about43 million have access to electricity,
so the Company needs to do much effort to speed up the rate of electrification in the Country.
For TANESCO to electrify an area, the following conditions must be fulfilled.
1. The connected load of the area is substantial.
2. People living in the area are able to pay bills.
3. The infrastructure of that area allows construction of HT lines, establishment of substations
and the construction of three phase distribution lines.
4. There is high tension (HT) line nearby to an area to tap power for feeding that area, and also
the high tension (HT) line must be capable of supplying the new load.
1.2: PROBLEM STATEMENT
Mbahe village is located in Moshi Rural District 60 kM from MOSHI Town in Kilimanjaro
Region. People living in this area have no access to electricity. About 4 kM from Mbahe village
there is an 11kV high tension line passing to Kilimanjaro National Park (KINAPA).The Village
is underdeveloped and has low economy i.e. low income per person, however it satisfy the
conditions of the utility company for being electrified, as there is a large number of prospective
customers who needs electricity and also the infrastructures of that area allows construction of
high tension (HT) lines, establishment of Substations and construction of three phase distribution
lines and finally there is High tension line nearby for the Village to tap power and feed the area.
My plan is to perform a case study for the possibility to electrify Mbahe Village by using
Electrical power from TANESCO. This can only be confirmed by a case study.
1.3: PROJECT OBJECTIVES
1.3.1: MAIN OBJECTIVE
The main objective of this project is to establish the technical and economic viability of
Electrifying Mbahe Village.
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1.3.2. SPECIFIC OBJECTIVES
A. To estimate the number of prospective customers who needs Electricity.
B. To estimate the expected load of the Village.
C. To design the proposed electrification map of the Area.
D. To estimate the Substations capacity.
1.4: SIGNIFICANCE OF THE PROJECT
I. To speed up the rate of Electrification in the Country.
II. Improving the living standards of the people living in Mbahe village.
III. Help Schools, Hospitals, Churches, Commercial activities and other Social Services to
operate effectively and efficiently.
1.5: PROJECT METHODOLOGY
In implementing this project, the following activities have been undertaken.
1. Literature review.
2. Data Collection
3. Data analysis.
4. Design a proposed Electrification map.
5.
Report Writing
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CHAPTER TWO
LITERATURE REVIEW
New electrification is done in an area after the area is fully surveyed. It is necessary to find out
the load requirement of the area where electricity is to be supplied. This depends on these:
1. Nature of the area.
2. The population of the town or village under consideration.
3. The density of the population.
4. The standard of living of people in the locality.
5. Industrial development in the area.
The load requirements of an area can be forecasted by means of a load survey. For
standardization on a natural basis, the load survey and load development directorate of the
central water and power commissions in Tanzania have classified some of the loads to a certain
extent of the lines given in the last section. Some average can also be assumed for preliminary
prediction. (E .O.Taylor, G.A.Boal; 1996)
2.1.1. DIFFERENT TYPES OF LOAD1. Residential or domestic load-This consist mainly of lights and fans, domestic appliances
such as heaters, electric iron, refrigerators, air conditioners for rooms, radio receivers, television
sets, electric cookers.
2. Commercial load-This consist mainly of lighting for shops, advertisements shops, fans and
electrical appliances used in commercial establishments-shops, restaurants, market places etc.
3. Industrial load-This type of load can be subdivided into sections depending on the power
range required.
4.Water supply-This load may be approximately estimated from the following data.
The requirements of water for rural area may be taken as 45 liters per day per person; for
semirural areas 70litres per day per person; and for urban areas, 90 liters per day per person.
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These are minimum requirements. If municipalities can provide better facilities, the cases may be
surveyed and estimated individually. Duplicate dumping sets should be installed, and the spare
sets should always be ready for use because water supply is an essentially service and must be
available continuously without failure
5. Irrigation-The power requirements for this type of load is dependent on the number of
watering required for each kind of the crop, the area of the land to be irrigated, the nature of the
soil, the working hours and the gross head. The demand factor may be taken as 80% to 90% for
tube well irrigation and 50% to 60% for privately owned individually controlled pump sets .Date
applicable to loamy soil and crops requiring 4 to 5 watering per season. (Depshande.M.V, 1979)
2.1.2. LOAD ASSUMPTION
The salient feature in planning an electrical distribution system is to ensure that adequate supply
is available to meet the estimated load demand near future and more distant future. The most
difficult task is the estimation of the future load. In general approach there should short term
estimates, long term estimates and load forecasting (E.O.Taylor, G.A.Boal, 1966)
Short term estimates-The shortest possible term over which the load forecast should made is
the length of time required to construct and omission a reinforcement of the system occurs
during winter. Consequently no forecast covering a short period than one year can possibly serve
any purpose, for if there is adequate capacity at other seasons. Normally a 415V or 11kV
reinforcement scheme can be planned, constructed and put into operation within twelve months,
so as short term forecast of twelve months meets the minimum requirements.
Long term estimates-If for example, a reinforcement of an 11kVsystem is considered, the
minimum time concept of one year establishes the time by which the reinforcement must be
completed .Immediate economic consideration would then suggest that the minimum works
should be carried out in that reinforcement and the possible result of action on this line is thatwithin a year so further reinforcement will be necessary and the work already carried out
becomes either redundant or departs from ideal. If however the tentative sites of all the33/
11kVsubstations in say seven years time were known and the associated11kVsystems based on
those substations were designed now, an orderly plan would be achieved. If now reverting to the
short term load forecast, the existing system based is considered, the places which will be over
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loaded within the next year and the appropriate part of it reinforced in accordance with the
minimum money is being spent at any time will result. Thus it can be seen that the minimum
forecast for the generation purposes of six or seven years can be used as the long term estimate
for an 11kVsystem .Long term 33kVsystem load forecasts would need to cover at least 10 years
ahead.
2.1.3. LOAD FORECAST.
Load forecasting is not an exact science and most such forecasting is done by studying trends or
history .A simple forecast of a future load in a small locality can be made if is known that a
specified number of houses are to be built on a vacant site. History shows that if there are more
than 50 houses in a group, the load to be met will vary between 1.5 and 7 kW per house,
depending on the degree of electrification and the type of house. A formula in common use for
estimating maximum demand is, After Diversity Maximum Demand (A.D.M.D) = (aN+8) kW.
Where ais a constant depending on the type of the property and the installed capacity and
N is the number of houses connected to distributor or a substation (E.O.Taylor, G.A.Boal, 1996)
Table 1: Load Consumption
POPULATION CONNECTED LOAD/CONSUMER(W)
Below 2000 100
2000-5000 200
5000-10000 300
10000-20000 350
20000-50000 400
50000-100000 500
Small scale Industries Up to 25kW
2.1.4. LOAD SURVEY METHODS
The area under consideration is visited and existing and future load requirements are forecast,
taking into account the needs for communities in the region and the factors which are likely to
increase the load demand of the area in the near future. The consumer groups are classified into
residential or domestic consumers, commercial consumers and industrial consumers.
Total maximum Demand =Load in KW times percentage Demand Factor.
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Maximum Demand of the group=total maximum Demand / Group Diversity Factor.
The maximum Demands of all the groups are added to get total maximum demand of the station.
Capacity of the substation is given by total maximum demand of the station times assumed
power factor. Knowing capacity of the substation will help in determining the number of
substations needed and their capacities to supply the area in consideration.
2.1.5. DEFINITION OF TERMS
Connected load
It is the sum of continuous ratings of all the equipment connected to supply system
Maximum demand:
It is the greatest demand of load on the power station during a given period
Maximum demand is generally less than the connected load because all the consumers do not
switch on their connected load to the system at a time
The maximum demand determines the installed capacity of the station. The station must be
capable of meeting the maximum demand.
Demand factor:
It is the ratioof maximum demand on the power station to its connected load.
Average load;
The average of loads occurring on the power station in a given period (day or month or year) is
known as average load or average demand
Load Factor
Is the ratio of the average load over designated period of time to the peak load (maximum load)
in that period
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2.1.7. PLANNING
When planning a new extension of a distribution system it is necessary to keep the following
main factors continuously in mind.
1. The regulation of voltage at the terminals of the consumersinstallations.
2. The sufficiency of the supply for the consumers present and future.
3. The cost of the supply both to the consumers and to the Electricity board.
The statutory requirement that the voltage at the consumers terminals should be maintained
within plus or minus six percent of the declared value must be adhered.
(E.O.Taylor, G.A, Boal; 1996)
Table 2: TANESCO Electricity Charges
Domestic low usage Tariff(D1) This category covers domestic customers who
on average have a consumption pattern for
50kW
The 50kW are subsidized by company are not
subjected to rate up to283.4KWh.In this tariff
category, power is supplied at a low voltage
single phase (230V).
General usage Tariff (T1) This segment is applicable for customers who
use power for general purposes including
residential, small commercial and light
industrial use, public lighting and billboards. In
this category the average consumption is more
283.4kW per meter reading period. Power is
given at low voltage single phase (230V) as
well as three phases (400V).
Law voltage maximum demand (MD) usage
tariff (T2).
Applicable for general use where power is
metered at 400V and average consumption is
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more than 7500kWh per meter reading period
and demand does not exceed 500kVAper meter
reading period.
High voltage maximum demand (MD) usage
tariff (T3).
Applicable for general use where power is
metered at 11kV and above.
Table 3: Tariffs
Domestic
law
usage(D1)
General
usage(T1)
Low voltage
max(T2)
High
voltage
max(T2)
Zanzibar
Low energy(0-50kWh)-
per kWh
Tshs 60.00
High energy charge per
kWh (above 50kWh)
Tshs 273.00
Service charge per
month
3841.00 14223.00 14,233.00 14233.00
Demand charge per
kVA
16,944.00 14,520.00 12,079.00
Energy charge per kWh 221.00 132.00 118.00 106.00
Note: All the charges above exclude VAT and EWURA.
Note: Highest maximum demand rule
Billing demand (BD) is the higher of kVA maximum demand during the meter reading period
and 75% of the highest kVA maximum demand of the preceding 3 month, provided that during
the first year of operation the billing demand shall be the higher of the kVA maximum demand
during the meter reading period and 75% of the highest kVA maximum demand recorded
commencing from the month the consumer is connected.
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Such comparison must however be treated in more depth ,since they must take into account
rights of way, clearance problems and planning permissions associated with the unsightly nature
of erecting bare conductors in rural and urban areas.
2.2.0. ENVIRONMENTAL CONDITIONS
i. Temperature
ii. Humidity
iii. Solar radiation
iv. Rainfall
v. Wind velocity
vi. Altitude
vii.
Ice and snow
viii. Atmospheric pollution
ix. Soil characteristics
x. Lighting
xi. Seismic factor
xii. General loadings.
2.2.1. CONDUCTOR SELECTION
The selection of the most appropriate conductor size at a particular voltage level must take into accountboth technical and economic criteria as listed below
i. The maximum power transfer capability must be in accordance with system requirements
ii. The conductor cross-sectional area should be such as to minimize the initial capital cost
and the capitalized cost of losses
iii. The conductor should conform to standard sizes already used elsewhere on the network
in order to minimize spares holdings and introduce a level of standardization
iv. The conductor thermal capacity must be adequate
v. The conductor diameter or bundle size must meet recognized international standards for
radio interference and corona discharge
vi. The conductor must be suitable for the environmental conditions and conform to
constructional methods understood in the country involved
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2.2.2. VOLTAGE REGULATION
When a transmission line is carrying current, there is a voltage drop in the line due to resistance
and inductance of the line. The result is that receiving end voltage (VR) of the line is generally
less than the sending end voltage (VS). This voltage drop (VS VR) in the line is expressed as a
percentage of receiving end voltage VR and is called voltage regulation. The difference in
voltage at the receiving end of a transmission line between conditions of no load and full load is
called Voltage regulationand is expressed as a percentage of the receiving end voltage.
Mathematically,
Percentage Voltage regulation =
100%
Obviously, it is desirable that the voltage regulation of a transmission line should be low i.e., the
Increase in load current should make very little difference in the receiving end voltage.
(V. K. Mehta, 2002)
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CHAPTER THREE
DATA COLLECTION
Mbahe village is located 4 kM from the distribution line
Number of prospective customers are 612 arrived to as follows;
Residential single-phase customers =500.
Commercial single phase customers (shops, groceries, bars, schools), =102
Commercial three phase customers
Milling machines =4
Dispensaries =2
Wood workshops =2
Water supply Schemes =2
Types of people living in the area are:
1. Workers.
2. Business peoples.
3. Peasants.
Type of the area: unsurveyed area.
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CHAPTER FOUR
DATA ANALYSIS
4.1.1. Calculation of Substations capacity.
(I)Number of single phase residential customers=602
Average power consumption each=1.2kW
Total power consumption=6021.2kW=722.4kW
(ii). Number of three phase commercial customers=10
Average power consumption each=6.4kW.
Total power consumption=106.4kW=64kW.
(iii)Total power consumption for all loads is given by:
Total power consumption of residential single phase+ Commercial three phase,
TOTAL=722.4kW+64kW=786.4kW
Substations capacity
Substations Capacity=Total power consumption/Assumed power factor.
=786.4kW/0.8
=983kVA
Including safety factor=1.2
Substations capacity=983kVA1.2
=1179.6kVA
Standard size of transformers available at TANESCO is
50kVA, 100kVA, 200kVA, 315kVA, 500kVA
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4.1.2. SELECTION OF TRANSFORMERS
1. Mbahe RC church substation 315kVA
2. KKKT substation 315kVA
3. Makomu sec substation 315kVA
4.
Mbahe primary school substation 315kVA
Length of HT line =3680m
Number of Transformers=4
Length of substation=3680/4=920m.
From the utility company, the standard length of HT line=70m
Number of poles=920m/70=13.4=14 poles.
Including two poles (one at the start and the other at the end) =16 poles.
Table 4: Load evaluation for assessed prospective customers
S/N LIGHT FAN RADIO COOKER E.IRON FRIDGE W/ PUMP MILLING
M/C
SUBTO
TAL
Rate No Rate No Rate No Rate No Rate No Rate No Rate No Rate No
1 0.06 6 0.07 1 0.02 1 1.5 0 1 0 1 1 1 0 22.38 0 1.45
2 0.06 8 0.07 1 0.02 1 1.5 1 1 0 1 1 1 1 22.38 0 4.07
3 0.06 6 0.07 0 0.02 1 1.5 0 1 0 1 0 1 0 22.38 0 0.38
4 0.06 8 0.07 0 0.02 1 1.5 0 1 1 1 0 1 0 22.38 0 1.5
5 0.06 6 0.07 0 0.02 1 1.5 0 1 1 1 0 1 0 22.38 0 1.38
6 0.06 6 0.07 0 0.02 0 1.5 0 1 1 1 0 1 0 22.38 0 1.36
7 0.06 4 0.07 0 0.02 0 1.5 0 1 1 1 0 1 0 22.38 0 1.24
8 0.06 5 0.07 1 0.02 1 1.5 0 1 1 1 0 1 0 22.38 0 1.39
9 0.06 6 0.07 1 0.02 1 1.5 0 1 1 1 0 1 0 22.38 0 1.45
10 0.06 6 0.07 0 0.02 1 1.5 0 1 1 1 1 1 0 22.38 0 2.38
TOTAL 16.6
Average load 1.66
NOTE
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Average load per consumer=total load/no of prospective customers
4.1.3. PROPOSED ELECTRIFICATION MAP OF MBAHE VILLAGE
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4.1.4. COST ESTIMATES FOR CONSTRUCTION OF A 11KV HT LINE TO PROSPECTIVE
CUSTOMERS FROM KINAPA TO MBAHE PRIMARY SCHOOL IN MOSHI RURAL.
Table 5: Cost estimates for construction of 11kV HT line to prospective customers
MATERIALS DESCRITPION UNIT QTY PRICE TOTAL
TREATED WOODEN POLES13M EA 16 426,229.60 6,819,673.60
100mm2ACSR MT 2760 1,536.08 4,239,580.80
CROSS ARMS EA 4 39,650.00 158,600.00
TWISTED TIE STRAPS EA 8 8,500.00 68,000.00
BOLTS & NUTS 10'' X 3/4'' EA 76 4,616.09 350,822.84
BOLTS & NUTS 2'' X 3/4'' EA 8 633.00 5,064.00
SECTION STRAPS EA 6 7,500.00 45,000.00
TENSION CLAMPS EA 6 17,720.39 106,322.34
DISC INSULATORS EA 12 10,000.00 120,000.00
HORIZONTAL PIN
INSULATORS EA 36 7,000.00 252,000.00
SQUARE CURVED WASHER3/4'' EA 76 450.00 34,200.00
STAY ROD 8'' X 3/4'' EA 4 18,500.00 74,000.00
STAY INSULATOR EA 4 1,600.00 6,400.00
STAY WIRE 7/8 MT 48 2,308.25 110,796.00
STAY BASE PLATE EA 4 20,046.00 80,184.00PREF. GRIP DEAD END EA 12 3,041.00 36,492.00
PREF.GRIP POLE TOP MAKE-
OFF EA 4 16,522.12 66,088.48
PIG TAIL HOOK EA 6 6,500.00 39,000.00
3mm AL BINDING WIRE ROLL 3 272.61 817.83
SOCKET CLEVIS & TONGUE EA 6 7,500.00 45,000.00
HATARI/DANGER PLATES EA 16 3,250.00 52,000.00
BARBED WIRE MT 16 462.72 7,403.52
U-NAILS KG 10 1,240.80 12,408.00
2" NAILS KG 10 3,500.00 35,000.00POLE CAPES EA 16 1,250.00 20,000.00
SUB TOTAL IN TSHS 12,784,853.41
ADD 10% MISCELANEOUSCHARGES 1,278,485.34
SUB TOTAL IN TSHS 14,063,338.75
ADD 6% STORE UPLIFT 843,800.33
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SUB TOTAL IN TSHS 14,907,139.08
LABOUR & SUPERVISION STAFF DAYS RATE TOTAL
MAINS ENGINEER 1 2 10,100.00 20,200.00
MAINS SUPERVISOR 1 5 8,400.00 42,000.00
MAINS FOREMAN 1 5 7,100.00 35,500.00
MAINS LINESMAN 4 5 5,600.00 112,000.00
SPECIAL TASKS EMPLOYEES 8 5 5,769.00 230,760.00
MAINS LORRY DRIVER 1 5 5,600.00 28,000.00
MAINS CAR DRIVER 1 5 5,600.00 28,000.00
SUB TOTAL IN TSHS 496,460.00
TRANSPORTATION KM DAYS RATE TOTAL
MAINS LORRY 2 5 2500 25,000.00
SUPERVISOR CAR 2 5 1250 12,500.00
SUB TOTAL IN TSHS 37,500.00
SUMMARY
MATERIAL COST 14,907,139.08
LABOUR & SUPERVISION 496,460.00
TRANSPORTATION COSTS 37,500.00
SUB TOTAL IN TSHS 15,441,099.08
ADD 10% OVERHEADCHARGES 1,544,109.91
GRAND TOTAL IN TSHS 16,985,208.98
4.1.5.COST ESTIMATES FOR ESTABLISHMENT OF POLE MOUNTED 315
kVA,11/0.4/0.23kV
SUBSTATION AT MBAHE RC CHURCH AREA
Table 6: Cost estimates for establishment of pole mounted
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315kVA, 11/0.4/0.23kV substation.
MATERIALS DESCRITPION UNIT QTY PRICE TOTAL
TREATED WOODEN POLES
10m EA 1 268,675.00 268,675.00
CHANNEL IRONS 7'' X 4'' X 4'' EA 4 39,650.00 158,600.00
BOLTS & NUTS 12'' X 3/4'' EA 6 4,616.09 27,696.54
BOLTS & NUTS 2'' X 3/4'' EA 4 750.00 3,000.00
SQUARE CURVED WASHER
3/4'' EA 4 450.00 1,800.00
EARTH ROD Cu EA 15 6,500.00 97,500.00
HT FUSES 10A MT 3 4,500.00 13,500.00
DROPOUT
FUSES&ARRESTORS11Kv SET 1 700,000.00 700,000.00
HATARI/DANGER PLATES EA 1 3,250.00 3,250.00
PC CUT OUTS 400A MT 3 60,000.00 180,000.00
35mm Cu BARECUNDUCTOR(For Earthing) EA 20 2,421.92 48,438.40
35-70mm RAYCHEM SET 2 1,000,000.00 2,000,000.00
POLE CAPS EA 1 1,250.00 1,250.00
70mm X 3CORES
ARMOURED CABLE 11kV 11kV MT 10 70,000.00 700,000.00
70mm X 4CORES
ARMOURED CABLE 0.4kV MT 10 70,000.00 700,000.0070mmCABLE LUGS EA 6 7,500.00 45,000.00
185mm CABLE LUGS EA 6 7,500.00 45,000.00
TRANSFORMER 315kVA
11/0.4/0.23kV EA 1 13,365,093.00 13,365,093.00
SUB TOTAL IN TSHS 18,358,802.94
ADD 10% MISCELANEOUSCHARGES 1,835,880.29
SUB TOTAL IN TSHS 20,194,683.23
ADD 6% STORE UPLIFT 1,211,680.99
SUB TOTAL IN TSHS 21,406,364.23
LABOUR & SUPERVISION STAFF DAYS RATE TOTAL
MAINS SUPERVISOR 1 3 8,400.00 25,200.00
MAINS FOREMAN 1 3 7,100.00 21,300.00
MAINS LINESMAN 2 3 5,600.00 33,600.00
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SPECIAL TASKS
EMPLOYEES 6 3 5,769.00 103,842.00
MAINS LORRY DRIVER 1 3 5,600.00 16,800.00
SUB TOTAL IN TSHS 200,742.00
TRANSPORTATION KM DAYS RATE TOTAL
MAINS LORRY 2 3 2,500.00 15,000.00
SUB TOTAL IN TSHS 15,000.00
SUMMARY
MATERIAL COST 21,406,364.23
LABOUR & SUPERVISION 200,742.00
TRANSPORTATION COSTS 15,000.00SUB TOTAL IN TSHS 21,622,106.23
ADD 10% OVERHEAD
CHARGES 2,162,210.62
GRAND TOTAL IN TSHS 23,784,316.85
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4.1.6.COST ESTIMATES FOR CONSTRUCTION OF LT LINE TO SUPPLY
POWER TO M/S EXACT LINE AT MBAHE RC CHURCH AREA
Table 7:Cost estimates for construction of
LT line to supply power to M/S exact line at
Mbahe RC Church area
MATERIALS DESCRITPION UNIT QTY PRICE TOT
TREATED WOODEN POLES 10m EA 11 268,675.00 2,955,425
D-IRON C/W BOLTS & NUTS EA 4 39,650.00 158,600
BOLTS & NUTS 8'' X 5/8'' EA 44 4,616.09 203,107
BOLTS & NUTS 10'' X 5/8'' EA 48 1,349.31 64,766
BOLTS & NUTS 2'' X 5/8'' EA 4 750.00 3,000
ROUND WASHER 5/8' EA 4 450.00 1,800
SHACKLE INSULATORS EA 15 6,500.00 97,500
Stay rod c/w adjustable and thimble square
base plate EA 7 34,871.81 244,102
Stay insulator EA 7 850.00 5,950
Stay wire MT 70 2,308.23 161,576
Pref.grip pole Top make off EA 7 16,522.12 115,654
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Pref.grip Dead end EA 21 6,884.21 144,568
SUB TOTAL IN TSHS 4,156,051
ADD 10% MISCELANEOUS CHARGES 415,605
SUB TOTAL IN TSHS 4,571,657
ADD 6% STORE UPLIFT 274,299
SUB TOTAL IN TSHS 4,845,956
LABOUR & SUPERVISION STAFF DAYS RATE TOT
MAINS SUPERVISOR 1 3 8,400.00 25,200
MAINS FOREMAN 1 3 7,100.00 21,300
MAINS LINESMAN 2 3 5,600.00 33,600
SPECIAL TASKS EMPLOYEES 6 3 5,769.00 103,842
MAINS LORRY DRIVER 1 3 5,600.00 16,800
SUB TOTAL IN TSHS 200,742
TRANSPORTATION KM DAYS RATE TOT
MAINS LORRY 2 3 2,500.00 15,000
SUB TOTAL IN TSHS 15,000
SUMMARY
MATERIAL COST 4,845,956
LABOUR & SUPERVISION 200,742
TRANSPORTATION COSTS 15,000
SUB TOTAL IN TSHS 5,061,698
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4.1.7.TOTAL COST TO FUND THE PROJECT
Table 8: Total cost to fund the project
S/N COST
1.0 High tension lines
=16,985,208.984
67,940,835.92
2.0 High tension lines
=4,156,051.864
166,242,207.4
3.0 Substations
=23,784,316.84
329,320,310.5
Total cost due to fund the project 329,320,310.5
ADD 10% OVERHEAD CHARGES 506,169
GRAND TOTAL IN TSHS 5,567,868
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CHAPTER FIVE
CONCLUSION AND RECOMMENDATIONS
5.1: CONCLUSION
The project introduces about the feasibility study to electrify Mbahe Village, by performing a
case study for the possibility to check weather an 11kV high tension line passing to Kilimanjaro
National Park( KINAPA) is viable to supply the the load of the Village.
Since the proposed load obtained for the Village is 1,180kVA and the number of proposed
transformers obtained are four each of 315kVA, then according to the standards of the Utility
Company an 11kV high tension line is viable to supply the load of the village.
5.2: RECOMMENDATION
In Tanzania most of the rural areas are not electrified, due to this problem some of them miss
suitable development programs and other benefits associated with electricity such as Schools,
Hospitals, Churches, Commercial activities and other social services.
Therefore by electrifying Mbahe Village, the peoples standard of living will be improved in the
Village and other benefits associated with electricity such as Commercial banks and other
activities will be obtained. So by electrifying rural areas, the development of the Country will be
improved by improving personal economy.
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APPENDIX A: WORK SCHEDULE
Oct Nov Dec Jan Feb Mar Apr May Jun
Selection of Project
Title
Title Defending
Literature Review
& Consultations
Data collection
Data Analysis
Report Writing
Submission of the
Report
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REFERENCES
1) Baylis C.R, (2005)Transmission and Distribution of Electrical Engineering Manchester,
Antony Rewe Ltd.
2) Boal G.A, (19660)Electrical Power DistributionOpenshaw, Edward Arnold Ltd.
3) Depshande M.V, (1979)Elements of Electrical power station Design McGraw-Hill.
4) Woodruff L. F, (1986)Principles of Electric Power Transmission, John Wiley &Sons, Inc.
Second Edition.