Skipping real-time dew-point monitoring (should stay below –50 °C); Incomplete sealing of transformer flanges or bushings; Shutting off the dryer too early before deep moisture is removed; Setting incorrect air flow rates—too low won’t displace moisture; too high causes turbulence; Ignoring maintenance—like filter changes or desiccant refresh—undermines drying efficiency https://www.yunengoilpurifier.com/common-mistakes-when-using-dry-air-generators-for-transformers