Engineer Hadeer Saleem Preventive maintenance of electrical machines is an essential part of managing and operating electrical and industrial facilities. It aims to maintain equipment efficiency and ensure continuous, safe operation without unexpected breakdowns, thereby reducing repair costs and extending the lifespan of machines. Preventive maintenance relies on scheduled plans and continuous inspection of electrical machines to identify potential problems before major failures occur. Preventive maintenance includes several fundamental procedures, such as cleaning machines from dust and dirt, ensuring proper lubrication of moving parts, and inspecting electrical wires and connections. Voltage, current, and temperature are also measured to ensure that machines operate within permissible limits. It is equally important to examine electrical insulation, motors, fans, and generators to ensure there is no wear or damage that could lead to serious malfunctions. Preventive maintenance helps improve energy efficiency, as equipment operates more effectively when in good condition, reducing electricity consumption. It also minimizes risks to workers, since regularly inspected and maintained equipment is less likely to cause fires or electrical shocks. In addition, preventive maintenance reduces production downtime, thereby enhancing productivity and decreasing financial losses. In conclusion, implementing preventive maintenance programs on a regular basis is a wise investment for any facility that uses electrical machines. It not only protects equipment from damage but also ensures safe and efficient operations, saving time and money in the long term. Al-Mustaqbal University – The First University in Iraq.