This report is about relays defence end systemic automatics of Lithuania electricity network. There is analysed relays defence end systemic automatics installations work, reason of deteriorations end incorrectly coordination. Comparing difference generations relay defences and systematic automatics equipments changing of prices tendency. Summarized difference generations relay defences and systematic automatics equipments prices-quality-function possibility relation. In this research summarized Lithuanian electrical system RAA service work. One of the research purposes, establish microprocessors RAA equipments planting in electrical system possibility, on its base carrying out RAA equipments reconstruction necessity and ground this necessity on economical calculations. Collected statistical data was summarized and drawed corresponded conclusions. Analysed electrical wind power stations influence to relay defences and to optimal systematic automatics coordination.