What is the function of an oil flow indicator in a transformer?

The function of an oil flow indicator in a transformer is to monitor the circulation of insulating oil within the cooling system. It provides real-time feedback on oil movement, ensuring that the oil is effectively circulating to dissipate heat generated during operation. This is crucial for maintaining optimal transformer temperature and preventing overheating, which can lead to insulation failure and reduced operational efficiency. Proper oil flow is essential for the transformer’s longevity and reliability.