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  • Medium-Low Speed Maglev

    CRRC ZELC has successfully constructed China's first medium and low-speed local transit maglev.

Class 21E Dual-Voltage Electric Locomotive

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. 

The locomotive’s axle load is 26 tons; starting effort is 380 kN; Maximum operating speed is 100km/h. 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.

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    ApplicationFreight service on main line
    Axle ArrangementBo-Bo

    Catenary voltage & 


    Single-phase AC25kV / 50Hz or DC3000V
    Track gauge1065 mm
    Whole weight102 t
    Max. operation speed100 km/h
    Traction power3000 kW
    Brake Power3000 kW
    Starting effort 380 kN
    Electric brake mode

    Regenerative brake and

    resistance brake

    Max. electric brake 


    200 kN

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