ALFRED P MTUI 110343238385.docx

8/10/2019 ALFRED P MTUI 110343238385.docx

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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


ADD 6% STORE UPLIFT 843,800.33


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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


SUMMARY

MATERIAL COST 14,907,139.08

LABOUR & SUPERVISION 496,460.00

TRANSPORTATION COSTS 37,500.00


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


ADD 10% MISCELANEOUSCHARGES 1,835,880.29


ADD 6% STORE UPLIFT 1,211,680.99


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


TRANSPORTATION KM DAYS RATE TOTAL

MAINS LORRY 2 3 2,500.00 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


ADD 6% STORE UPLIFT 274,299


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



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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.

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