الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The possible effect of low frequancy electric field exposure in occupational and residential enviroments raises the question of how electric fields are created , and what effects they may have. utilities in particular are interested in the sources and the levels of the electric fields associated with their related equipment in recent years. therefor in this thesis not only the simulation of the electric field inside high voltage substations is achieved but also it is measured into actual 500/220 KV air insulated substation (AIS)under 500 KV and 220 KV barbas.