Based on the available literature, this paper deals with the topic of insulation coordination from the point of view of selecting surge arresters. The protection of the power system and all the elements that make it up requires special attention, because poorly selected protection can result in very significant damage. Therefore, it is of great importance to properly and efficiently implement the insulation coordination procedure in order to achieve the best possible level of protection. In addition to the main element of protection (surge arrester) against voltage stresses, which is described in Chapter 8, insulation coordination methods are listed. Chapter 2 provides a brief overview of the voltage stresses to which the power system is constantly exposed, as well as their classification and characteristics according to IEC 60071-1. Their impact on the power system when they occur is described. Lightning strikes to the transmission line and the plant are also illustrated, which are shown in Figures 2.2 and 2.3. Chapters 3 and 4 deal with the classical, i.e. a statistical method of insulation coordination that allows us to see known and unlikely voltage stresses, as well as the selection and coordination of equipment for the purpose of the best possible protection. For the classic insulation coordination method, the voltage ranges of the equipment are listed, and the procedure for determining the tolerable insulation coordination voltage is described. The procedure for determining the risk of insulation failure according to the IEC 60071-2 standard is given for the statistical method. Figures 4.1 and 4.2 show the assessment of the failure risk factor and the probability of overvoltage. Chapter 5 deals with the process of insulation coordination according to IEC and IEEE standards. Principles and procedures according to IEC and IEEE standards are described in the mentioned chapter, while Tables 5.3 and 5.4 give standard insulation levels according to IEEE standards, and Tables 5.5 and 5.6 standard insulation levels according to IEC standards. Chapters 6 and 7 present the coordination of the insulation of the transmission line and the station. The impact of lightning on the line is shown, as well as its influence on the coordination of the insulation. Methods for improving water protection are also given. Chapter 8 describes the selection of surge arresters, primarily the metal-oxide surge arrester. The principle of operation of the surge arrester is described, as well as the determination of its operating voltage, and its protection zone. The current-voltage characteristic of the surge arrester is given, and the rules that must be followed when installing it in relation to the protected equipment are given.