Pressure Seal Technology: When transformers are in operation and cannot be immediately shut down for maintenance, pressure seal technology can be employed. This technique uses special sealing tools and materials to seal leakage points while the transformer is under pressure. For instance, in the case of pressure seal with injection, a clamp is first fixed around the leakage area to form a sealed cavity, and then sealing adhesive is injected into the cavity, allowing it to fill the leakage pathways under pressure, thus achieving a seal. However, this technology requires professional operation and must be strictly adhered to the operational procedures to ensure safety and effective sealing.