Investigation of Field Induced Effect of High Voltage Transmission Line in Calabar South, Nigeria

Abstract

Due to increase in energy cost of transmission, high voltage transmission becomes the most economical for the transfer of large amounts of electrical power, because the higher the transmission voltage, the more efficient and cheaper the transmission. Due to increase in population, the towns are expanding, and naturally result in the construction of buildings near high voltage power lines. This research gives an in depth analysis of fields emitted by 11 kV and 33 kV power line and also describes in details the points where the highest field emission (at distance of 50 m, 1.17 µT is recorded for magnetic field around 11 kV power line and beneath the power line a field of 0.82V/m was recorded for electric field) and compares measurements of this fields with the international standard threshold values of 5V/m and 0.1 µT for the public. The magnetic field shows field/health effect as its exceeds the threshold value at some point while the electric field at all points is still below the limit as recommended by International Commission of Non-Ionizing Radiation Protection (ICNIRP).