Lightning is one of the major sources of transient overvoltage in transmission system. This can damage overhead lines and other apparatus’s of transmission system and also dangerous for human life’s. To overcome the effect of transient over voltage, surge arresters are used. To protect power system against lightning stokes and switching surge, surge arresters are used. For this study, a surge arrester model and transmission line system are developed using restructured version of electromagnetic transient program (EMTP-RV). Surge arrester is connected between phase and earth and diverts the surge current to earth without affecting the supply. This paper examines the different surge arrester models and comparing their results. All these modeling and calculation were done in EMTP-RV program