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S_7系列低损耗变压器的研制是在省机械局领导下,从一九八一年末开始,由省内八个变压器厂抽人组成设计组,九个生产厂试制,于一九八二年末进行了鉴定。专家们认为,本系列样机满足了技术条件和鉴定例行程序的要求,在性能上达到了目前国际较先进水平的四德西门子公司DIN42503标准,所以确认为是更新换代的变压器产品,有关科研单位已将其列为等效采用IEC标准的先行品种,确定其型号为S_7系列铜线圈低损耗变压器。
The development of the S_7 series of low-loss transformers was under the leadership of the Provincial Bureau of Machinery. From the end of 1981, a design team was drawn from eight transformer factories in the province. Nine production plants were trial-produced and were carried out at the end of 1982. Identification. Experts believe that the prototype of this series meets the requirements of technical conditions and routines for identification, and has reached the internationally advanced level of Si Deman Siemens DIN42503 standard in terms of performance. Therefore, it is confirmed that it is a new generation of transformer products, and the relevant scientific research units It has been listed as a precursor to equivalent IEC standards, and its model is identified as the S_7 copper coil low-loss transformer.