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据调查我国已建的中小型水电站中,单机容量为20MW及以下多采用扩大单元结线,额定电压为10KV、6.3KV,厂用变压器容量为180～320KVA,厂用分支短路容量约为300～400MVA,用已生产的RN1—10/2×20型熔断器作变压器高压侧保护,不仅额定电流满足要求,切断容量也能配合,简化布置,节省了投资。
According to the investigation of China’s small and medium hydropower stations have been built, single unit capacity of 20MW and below to use more expansion unit connection, rated voltage of 10KV, 6.3KV, factory transformer capacity of 180 ~ 320KVA, plant branch short circuit capacity of about 300 ~ 400MVA, with the production of RN1-10 / 2 × 20-type fuse for high voltage side of the transformer protection, not only rated current to meet the requirements, cut off capacity can also be combined to simplify the layout and save investment.