In most practical cases, no – low-frequency drying is specifically designed to be performed without removing the active part from the tank. The method heats the windings by circulating low-frequency current directly through them while the core remains in place. This allows moisture to be driven out under controlled conditions, often combined with vacuum. Removing the active part is required only in exceptional cases, for example when severe mechanical damage or major refurbishment is planned, not for standard LFD drying.