This book is a translation of the Indonesian version titled “Cara EZ Belajar ETAP”. This English version is expected to be available for a broad range of readers. Do you know the electrical power system? This system is a high or medium voltage electrical network but calculations are required to measure and validate a network system. However, if manual calculations are used, it will take a very long time. Therefore, a software named etap was created. etap (electrical transient analysis program) is a software used to simplify the analysis of an electrical network system. As its name suggests, etap can work to analyze power flow (load flow), transient disturbance (transient), harmonics, and up to the protection system (short circuit). This etap software also has standards, namely ANSI (American National Standards Institute) and IEC (International Electrotechnical Commission) standards.