在60年代,北京市面粉三厂得到北京供电局的支持,用180KVA电力变压器水冷超负荷运行,代替420KVA变压器的试验成功。试验情况曾在电业部门内部刊物上作了报导。有些杂志,如《科学实验》等,也曾刊登过类似消息。一时许多工厂误认为这是“小马拉大车”既节省变压 In the 1960s, the Beijing No. 3 Flour Mill received the support of the Beijing Power Supply Bureau and used water-cooled 180KVA power transformers for overloaded operation. The success of replacing the 420KVA transformer was successful. The trials have been reported in internal publications of the electrical industry. Some magazines, such as “Science Experiments”, have also published similar news. Many factories mistakenly believe that this is a “small horse-drawn cart” that saves pressure