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四、电气系统 1.主电路主电路示意图见图5。采用两段串联晶闸管二极管混合桥达到无级调速的主电路原理适合于两个独立的电机组。 (1) 与交流25千伏接触网相接的牵引变压器原边电路包括一个受电弓、一个接地开关、一个避雷器、一个电压互感器和一个主断路器。电流互感器用来做为牵引变压器原边的过流检测装置。 (2) 牵引变压器的二次绕组平均的分成几组,每组有三个绕组。每组的两个绕组与电枢变流器桥相连接,而另一绕组与磁场变流器桥连接。
Fourth, the electrical system 1 main circuit schematic diagram shown in Figure 5. The main circuit principle of stepless speed regulation with two stages of thyristor diode hybrid bridges is suitable for two independent motor groups. (1) The traction transformer primary circuit connected to the AC 25 kV contact network includes a pantograph, a grounding switch, an arrester, a voltage transformer and a main breaker. Current transformer is used as the primary side of the traction transformer over-current detection device. (2) The secondary windings of the traction transformer are divided equally into groups of three windings each. The two windings of each group are connected to the armature converter bridge and the other winding is connected to the field converter bridge.