Study of the Electromagnetic Emission Generated from the Underground Cables between the Low- Tension Transformer and Residential Units. Problems and Solutions

Abstract

. Propagation of the magnetic field radiation in many residential areas within Riyadh City is high and sometimes exceed 300 mG. It has been found that the source of this radiation is underground cables that lies between the low voltage transformers and houses. The aim of this investigation is to find the sources of electromagnetic emissions and the reason for their emission and then develop solutions to avoid this problem. The outcomes of this survey indicated that the primary cause for the magnetic field radiation contamination results from the earthling of the neutral cable as that place for the earthling must be at one point before the low voltage transformer. This study has also provided solutions to avoid this problem through applying special earthling per dwelling unit availed by the client, where the company that provides the service of electricity test the efficiency of this earthling before opening the master breaker for the client . A complementary solution to this problem is to impose install breakers (MCCB) or (RCD) in the client box as a compulsory prerequisite for connecting electricity and electricity supplier install this breaker to prevent client overtakes. This study has concluded that many of the benefits can be achieved through applying these technical proposals to meet the aim of prevention of electromagnetic radiation resulting from technical faults in the electrical conductivity within the homes.