【摘要】 系统介绍了ＳＳ４Ｂ型电力机车电气线路，对机车主电路、辅助电路和控制电路（有接点控制电路）的组成一一作了说明更多还原

【Abstract】 The electrical circuits of SS 4B electric locomotive are introduced systematically.Composition of loco main circuit, auxiliary circuit and control circuit(with contact control) are explained one by one.更多还原