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This paper summarizes the results of the research for load management of pole-transformers done in 1997–1999 in Korea. The purpose of the research is to enhance the peak load estimation of pole-transformers. For this purpose, we concentrate on two parts. One is to modify the load regression equation for load management of pole-transformers. The other is to estimate the cooling load possessions of customers and reduce estimation errors of the peak load for pole-transformers in the summer season. To do this, we propose indices of cooling load estimation using the increment of electric energy from spring to summer. Case studies for sample pole-transformers show that the proposed peak load estimation method could reduce estimating error of the peak load in the summer season, compared with the conventional method in Korea. [Copyright &y& Elsevier]