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Transformers are critical components of power grids and their long life ensures uninterrupted operation of the system. However, their performance can degrade over time due to overload, temperature fluctuations and external factors. Therefore, regular maintenance and preventive measures play an important role in extending the life of transformers. 

First of all, transformers should be protected with protective equipment such as fuses, breakers and relays to prevent them from being affected by adverse conditions. Then, regular oil tests should be performed and insulation quality should be checked. In transformers exposed to high temperatures, the oil may deteriorate and lose its insulating properties. In addition, periodic electrical tests can prevent sudden outages by identifying potential faults in advance and taking precautions. Furthermore, cooling systems should be kept in good working order and components such as fans and radiators should be routinely cleaned. 

Furthermore, grid management should be optimized to avoid overloading transformers. With smart monitoring systems, load changes can be continuously analyzed and early warning mechanisms can be created. Thus, the resilience of transformers against sudden failures is increased and energy efficiency is ensured.