Replacement of LT (Low Tension) and HT (High Tension) bushings in a transformer is an important maintenance task to ensure electrical insulation and safe current flow between internal windings and external connections. Bushings may degrade over time due to electrical stress, contamination, or mechanical damage, leading to partial discharge or oil leakage. The replacement process involves de-energizing the transformer, draining oil as needed, removing the damaged bushings, and installing new ones with proper torque and sealing. Careful handling and alignment are critical to avoid internal damage. Timely bushing replacement helps maintain reliability, insulation integrity, and overall transformer performance.
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