NSW TrainLink D set

D set
D set
	D31 at Sydney Terminal
In service	2024 (expected)
Manufacturer	Hyundai Rotem
Built at	Changwon, South Korea
Replaced	V sets; H sets (to be transferred to Sydney Trains);
Constructed	2019–present
Number under construction	610 carriages (61 4-car sets and 61 6-car sets)
Formation	DD–DN–DND–DDA; DD–DNL–DT–DN–DND–DDA;
Fleet numbers	D1–D61 (4-car sets); D101–D161 (6-car sets);
Operators	NSW TrainLink
Depots	Kangy Angy Maintenance Centre
Lines served	Blue Mountains; Central Coast & Newcastle; South Coast;
Specifications
Car body construction	Stainless steel
Train length	81.55 m (267 ft 6+5⁄8 in) (4-car sets); 122.23 m (401 ft 1⁄4 in) (6-car sets);
Car length	20,435 mm (67 ft 1⁄2 in) (DD/DDA); 20,340 mm (66 ft 8+3⁄4 in) (DNL/DT/DN/DND);
Width	3,034 mm (9 ft 11+1⁄2 in)
Height	4,402 mm (14 ft 5+1⁄4 in)
Doors	Plug-style, 2 per side
Maximum speed	160 km/h (99 mph)
Weight	199.8 t (196.6 long tons; 220.2 short tons) (4-car sets); 298 t (293 long tons; 328 short tons) (6-car sets);
Traction system	Mitsubishi SiC–VVVF
Traction motors	3-phase AC induction motor
Acceleration	0.8 m/s2 (2.6 ft/s2)
Deceleration	1.01 m/s2 (3.3 ft/s2) (service); 1.1 m/s2 (3.6 ft/s2) (emergency);
Electric system(s)	1,500 V DC (nominal) from overhead catenary
Current collector(s)	Pantograph
UIC classification	2′2′+Bo′Bo′+Bo′Bo′+2′2′ (4-car sets); 2′2′+Bo′Bo′+2′2′+Bo′Bo′+Bo′Bo′+2′2′ (6-car sets);
Coupling system	Dellner
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The NSW TrainLink D sets, also referred to as the Mariyung trains, are a class of electric multiple units (EMU) being built to replace NSW TrainLink's Intercity EMU fleet. The trains will operate on services from Sydney to Newcastle, Lithgow and Kiama, allowing the retirement of NSW TrainLink's V set fleet, and freeing the H set fleet for reallocation to Sydney suburban services.

The first trains were delivered in December 2019. After a protracted dispute between the government and the drivers' trade union over their safety, the first are scheduled to enter service in 2024.

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