What does the oil temperature indicator in a transformer do?

The oil temperature gauge in a transformer plays a crucial role in monitoring the temperature of the insulating oil, which is vital for the safe and efficient operation of the transformer. It helps in detecting overheating conditions that can indicate excessive electrical loading, inadequate cooling, or potential faults within the transformer system. By continuously providing real-time temperature readings, the oil temperature gauge helps operators take timely action to prevent oil breakdown, maintain optimal operating conditions, and ensure the longevity of the transformer. In essence, a well-functioning oil temperature indicator is essential for maintaining transformer health and reliability.