AAC & ACSR ALUMINIUM CONDUCTORS
[EIRI/EDPR/1368] J.C.: 139
INTRODUCTION
Aluminium Conductors (i) All Aluminium Conducts (AAC) (ii) All Alloy Aluminium Conductors (AAAC), and (iii) Aluminium Conductors Steel Reinforced (ACSR) are used in Transmission and Distribution system to carry the generated electrical energy from generating station to end user.
The Electrical energy is normally generated at the power stations far away from the urban areas where the consumers are located. There is a large network of conductors between the generating stations and the consumer.
The network is called the Transmission and Distribution system. The Transmission system is to deliver bulk power from power stations to the load centres and large industrial consumers beyond the economical service range of the regular primary distribution lines where as distribution system is to deliver power from power sector or substations to the various consumers. This transmission and distribution system can employ either overhead system or underground system. Transmission of power, overhead system mainly due to low cost and some other advantages ACSR generally used or transmission line and AAC and AAAC conductors for distribution of power carry out mostly the high voltage transmission. For transmission and distribution of electric power the conductor material used must have the following characteristics:
i) High conducting i.e. low specific resistance
ii) High tensile strength in order to withstand mechanical stress
iii) Low specific gravity in order to give low weight per unit volume
iv) Low cost in order to be used over long distance
v) Should not be brittle
Copper, Aluminium, Steel and Steel cored aluminium, galvanized steel conductors are generally employed for this purpose and preferably stranded in order to increase the flexibility (Solid wires, except of smaller sizes, are difficult to handle and when employed for long spans tend to crystallize at the points of support because of the swinging in winds. Stranded conductors usually have a central wire around which there are successive layers of 6, 12, 18, 24 wires. For 19 layers, the total number of individual wire is 3n (n+1). If the diameter of each strand is torn diameter of the stranded conductors will be (2n+1) d. In the process of manufacture adjacent layers are spiraled in opposite direction, so that the layers are bound together. This method of construction is called as Concentric Lay, out of above mentioned conducting materials, Aluminium is widely used due to its cheapness and many others comparative advantages over other conducting materials. However, owing to the fact that the line or co-efficient of expansion of aluminium is 104 times that of copper, the sag is greater in aluminium wire, therefore, steel cored Aluminium (ACSR) wire is used to compensate this property of Aluminium. The steel conductors used are galvanized in order to prevent rusting and electrolytic corrosion.
The AAC/AAAC/ACSR conductors for high voltage transmission have first replaced the bore copper conductors where copper is scarce and costly on the other hand EC grade Aluminium is easily available in India and as far as the electric properties are concerned, aluminium is equally good being lighter in weight and for same sage span length of the transmission could be increased in comparison to copper.
COST ESTIMATION
Plant Capacity 2.93 MT/Day
Land & Building (2000 sq.mt.) Rs. 1.89 Cr
Plant & Machinery Rs. 1.37 Cr
Working Capital for 3 Months Rs. 1.51 Cr
Total Capital Investment Rs. 5.04 Cr
Rate of Return 37%
Break Even Point 53%
CONTENTS
INTRODUCTION
USES & APPLICATIONS
PROPERTIES OF CONDUCTORS
B.I.S. SPECIFICATIONS
MARKET POSITION
PROJECTED ALUMINIUM USAGE TRENDS IN POWER SECTOR DURING 2012-17
QUALITY CONTROL OF ALUMINIUM CONDUCTORS
MANUFACTURING PROCESS
PROCESS FLOW CHART FOR ACSR CONDUCTOR
PROCESS FLOW SHEET FOR ALL ALUMINIUM ALLOY CONDUCTORS
PLANT LAYOUT
PRINCIPLES OF PLANT LAYOUT
PLANT LOCATION FACTORS
EXPLANATION OF TERMS USED IN THE PROJECT REPORT
MANUFACTURERS/SUPPLIERS/EXPORTERS OF ALUMINIUM CONDUCTOR
APPENDIX – A:
01. PLANT ECONOMICS
02. LAND & BUILDING
03. PLANT AND MACHINERY
04. OTHER FIXED ASSESTS
05. FIXED CAPITAL
06. RAW MATERIAL
07. SALARY AND WAGES
08. UTILITIES AND OVERHEADS
09. TOTAL WORKING CAPITAL
10. TOTAL CAPITAL INVESTMENT
11. COST OF PRODUCTION
12. TURN OVER/ANNUM
13. BREAK EVEN POINT
14. RESOURCES FOR FINANCE
15. INSTALMENT PAYABLE IN 5 YEARS
16. DEPRECIATION CHART FOR 5 YEARS
17. PROFIT ANALYSIS FOR 5 YEARS
18. PROJECTED BALANCE SHEET FOR (5 YEARS)
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