Winding Temperature Indicators (WTI) are essential monitoring devices used in power transformers to measure and simulate the actual temperature of transformer windings during operation. These instruments help prevent overheating and insulation damage by providing accurate temperature indication along with alarm and trip contacts for protection systems. Widely used in electrical substations, power plants, and industrial power distribution networks, WTI devices ensure safe transformer operation and improve equipment reliability. Durable construction and precise monitoring make them a critical