大别山区天堂电厂第二级电站有3200千瓦和1250千瓦水轮发电机组各一台,用4000千伏安和1800千伏安的主变各一台对35千伏系统送电,原设计电气主结线如图1。施工时实际简化为图2。主变没有差动保护和瓦斯保护,在主变的6.3千伏侧和35千伏侧各装有一套晶体管低电压闭锁的 There are 3200 kilowatts and 1250 kilowatts hydroelectric generating sets for the second stage power plant of Dabie Mountain Paradise Power Station, one for each 35kV system with 4000kV and 1800kV main transformers, and the original design electric main Junction shown in Figure 1. The actual construction of the simplified Figure 2. The main transformer without differential protection and gas protection, the main transformer in the 6.3 kV side and 35 kV side each equipped with a transistor low voltage latch