Why is silicone oil viscosity important in transformer applications?

Viscosity affects the flow characteristics of silicone oil within a transformer. Appropriate viscosity ensures that the oil can circulate effectively, providing uniform cooling and insulation. If the viscosity is too high, oil circulation may be impeded, leading to hotspots and overheating. Conversely, if the viscosity is too low, it may not adequately insulate or lubricate the internal components. Silicone oil’s stable viscosity over a wide temperature range makes it ideal for maintaining consistent performance under varying operating conditions.