class 923-0 -0 subclass -3000 subclass Unit formation Type index	T4 set
	In 2000, JR Central developed class 923 in order to replace superannuated class 921/922 used as a high-speed track and overhead feeder line inspection train for the Tokaido-Santo Shinkansen. The maximum speed is 270 km/h. It is based on the production 700 series design. The nose section profile is same as that of 700 series. Class 923's bodies are made of Aluminum alloy hollow extrusions such as 700 series. Although class 921 track inspection vehicle is equipped with 3 trailer bogies, a track inspection vehicle located at car's No. 4 is equipped with 2 trailer bogies. The other vehicles are motored. Although class 923 adopt TDT204 for motored vehicles such as 700 series, a track inspection vehicle adopts TTR8001 equipped with 2 anti-yaw dampers and inspection devices.
	Technical Data Items Data Built 2000 Construction Aluminum Formation 6M1T Supply voltage 25,000VAC, 60Hz Service speed, etc. Acceleration: 2.0km/h/s Service speed:270km/h Length 27,350mm (End cars) 25,000mm (Intermediate cars) Width 3,380mm Height 3,650mm Bogie TDT204 (motored) TTR8001 (trailer) Collector TPS302 Single arm (4 per 7-car train) Traction motor TMT6A, TMT7A, TMT8 (275kW) Gear ratio 2.96 Transformer TTM3A Controller TC12B (IGBT 3 step inverter) Air conditioner TAU32A (29,000kcal/h) +TAU33 (11,000kcal/h) Designed by JR Central