When using LFD on large transformers, the main limitations are related to power availability, process duration, and thermal control. Very large windings require high currents and long drying times, sometimes many days. There is a risk of uneven heating or local overheating if temperature monitoring is poor, which can damage cellulose. Mechanical stresses from thermal expansion and the need for a reliable deep vacuum system are also critical factors. Proper control and experienced operation are essential to avoid insulation degradation.