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In most substations, temperature data for transformers still hides behind the control room screens. Oil, core, and winding temperatures — the “three thermometers” that reveal a transformer’s true condition — are often invisible at the equipment itself. Operators walk back and forth between panels and SCADA terminals just to confirm if things are running hot or cold. In regions like   Inner Mongolia, Gansu, and Xinjiang , where on-site staffing is essential, maintenance teams