Dual-Voltage Electric Locomotive
Class SA 21E
The freight locomotive (hereinafter referred to as SA 21E) is the first dual-voltage electric locomotive for Transnet Freight Rail developed in China, which has been further optimized upon SA 20E.
Its carbody is of an integral monocoque construction and is welded by steel plates and profiled elements. It can withstand more than 4MN compressive load and tensile load. It is equipped with air brake system and WDP system (control system of hard wire distributed power), which are all in compliance with AAR Standard. Tow-axle narrow-gauge bogies are adopted. Traction device adopts low-positioned dual draw bar structure; traction motor is suspended in an axle-hung manner.
|Application||Freight Service on Mainline|
|Catenary Voltage & Frequency||Single-Phase AC 25 kV / 50 Hz or DC 3000 V|
|Track Gauge||1 065 mm|
|Total Weight||102 t|
|Max. Operation Speed||100 km/h|
|Traction Power||3 000 kW|
|Brake Power||3 000 kW|
|Starting Effort||380 kN|
|Electric Brake Mode||Regenerative Brake and Resistance Brake|
|Max. Electric Brake Effort||200 kN|