RTO 0266-3A Winding Temperature Gauge Switch

RTO 0266-3A Winding Temperature Gauge Switch is a combined winding-temperature indicator and switching device designed to monitor the temperature of electrical windings and provide a corresponding switching action within a protection or control scheme. The unit features a 0–160 °C measurement range (often labeled as RTO 0-160 C on listings), allowing operators to observe winding temperature across this span and to trigger downstream circuits or alarms when limits are exceeded. This particular configuration is identified by the model number 0266-3A within RTO's catalog, ensuring proper compatibility with replacement-part inventories and service documentation. By integrating temperature indication with a switch in a single assembly, the winding temperature gauge switch simplifies wiring and installation compared with discrete sensors and separate indicators, enabling a more straightforward path to implementing thermal protection strategies for windings in motors, transformers, or other energized equipment.