Question
Analyse the reasons for transformer failure in your utility.
Answer :
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Transformer failure in a power distribution utility occurs due to a combination of technical, operational, and environmental factors. One major reason is overloading. Distribution transformers are often subjected to loads beyond their rated capacity due to rapid growth in electricity demand, unauthorized connections, and poor load management. Continuous overloading leads to overheating of windings and insulation deterioration, ultimately causing failure. Poor maintenance practices also contribute significantly to transformer failure. Lack of regular inspection, oil testing, and preventive maintenance allows small defects such as insulation weakness, moisture contamination, and loose connections to develop into serious faults. Transformer oil degradation reduces its cooling and insulating properties, which increases the
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