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A high overload transformer has a strong capacity to withstand high resistance loads and prevent burnout due to overload. Previously, to avoid severe transformer overload during peak electricity demand, power supply companies typically used measures like adding variable capacity transformers or replacing distribution transformers with larger capacities to handle peak loads. However, these retrofits not only increased the risk of transformer overload during short-term high demand but also resulted in low load rates for large-capacity transformers during off-peak periods, failing to achieve economic operation while increasing operation and maintenance costs. The high overload transformer effectively solves these problems: it can handle severe overload operation for short periods, maintain a high load rate under normal operation, reduce operation and maintenance costs, and deliver excellent economic performance.