References [1] Roy Billington and Ronald N Allan, "Reliability Evaluation Engineering Systems", Pitman Advanced Publishing program, London, England, 1984. [2] Roy Billington, "Reliability Evaluation of power systems", Longman Scientific and Technical Publications, UK, 1987. [3] IEEE, "IEEE Full Use Guide for Electric Distribution Reliability Indices", IEEE Std 1366-2001, March 2001. [4] Ceylon Electricity Board, "Annual Report of the Provincial Control Centre- NWP 2005", Ceylon Electricity Board, 2006. [5] Ceylon Electricity Board, "Genco Tariff Study 2004-2006 by Energy Sales Branch", Ceylon Electricity Board, 2007. [6] Mohan Munasingha, "The Economics of Power System Reliability and Planning theory and case study", Johns Hopkins University Press, Baltimore, 1979. [7] Aditya Birla Group, "Jaya shree Insulators", Aditya Birla Group, 2001. [8] Advantica Stoner Inc., " User Guide-SynerGEE electric 3.5 version", Advantica Stoner Inc., Carlisle, PA, 2003. [9] Ceylon Electricity Board, "Medium Voltage Construction Standard for 33 kV Distribution Lines", Ceylon Electricity Board, September 1997. [10] M.A.R.M. Fernanado, J.B. Ekanayaka, A.C.S. Wijethilaka, D.C.D.G. Wijerathna and S.M. Buwanski, " Recommendations for insulator Pollution- Flashovers in Sri Lanka with Special emphasis on a study of composite insulators", "ENGINEER" Journal of IESL, Vol XXXIII No 32, October 2000, pp 7-18. [11] R . Ramakumar, "Reliability Engineering", CRC press LLC, United States, 2000. [12] Central Bank of Sri Lanka, "Annual Report 2006" Sarvodaya Vishwa Lekha (Pvt) Ltd., March 2007. [13] Ceylon Electricity Board, "Standard Construction Cost for year 2008", Ceylon Electricity Board, November 2007. [14] Paul.G.Keat and Philip K.Y.Young, "Managerial Economics, Economic tools for today's decision makers", 4th Edition, Pearson Education, 2nd Indian Reprint, 2005.