Introduction 1. An Overview of the Development of Electric Locomotives in China 2. A Summary of the HXD Series of AC Transmission Electric Locomotives 3. The HXD1D Electric Locomotive 4. The HXD3 Electric Locomotive Chapter 1 Electric Locomotive Body 1.1 Locomotive Body Equipment Arrangement 1.2 Ventilation and Cooling System 1.3 Air Pipeline System 1.4 Coupler-buffer Unit Exercises Chapter 2 Electric Locomotive Bogie 2.1 An Overview of the Bogie 2.2 Bogie Frame and Auxiliary Devices 2.3 Elastic Suspension Device 2.4 Wheelset Drive Device 2.5 Traction and Brake Devices Exercises Chapter 3 Assembly and Commissioning of the Electric Locomotive 3.1 Main Technical Parameters 3.2 Final Assembly and Commissioning Exercises Chapter 4 Electric Locomotive Maintenance During Operation 4.1 Works of Service Preparation 4.2 Inspection During Preparation 4.3 Case Analysis of Locomotive Failures Exercises References