New South Wales D set

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D set
D31 testing at Sydney Terminal, January 2023
Interior (lower deck)
In service	Late 2024/Early 2025
Manufacturer	Hyundai Rotem
Built at	Changwon, South Korea
Replaced	V sets H sets (to be transferred to Sydney's suburban lines)
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	Sydney Trains (testing phase)
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	176 km/h (109 mph) (design) 130 km/h (81 mph) (service)
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[1]
Traction motors	3-phase AC induction motor[1]
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 New South Wales D sets, also referred to as the Mariyung trains, are a class of electric multiple units (EMU) being built to replace Sydney Trains's Intercity EMU fleet. The trains will operate on services from Sydney to Newcastle, Lithgow and Kiama, allowing the retirement of Sydney Trains's V set fleet, and freeing the H set (OSCAR) 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 Tuesday December 3 2024.^[2][3]