721 series | |
---|---|
In service | 1988–Present |
Manufacturer | Hitachi, JR Hokkaido, Kawasaki Heavy Industries, Tokyu Car |
Constructed | 1988–2003 |
Number built | 135 vehicles (34 sets) |
Number in service | 135 vehicles (34 sets) |
Formation | 3/6 cars per trainset |
Operators | JR Hokkaido |
Depots | Sapporo |
Lines served | Hakodate Main Line, Chitose Line |
Specifications | |
Car body construction | Stainless steel |
Car length | 21,670 mm (71 ft 1 in) (end cars) 21,300 mm (69 ft 11 in) (intermediate cars) |
Width | 2,954 mm (9 ft 8.3 in) |
Height | 4,090 mm (13 ft 5 in) |
Doors | 3 per side |
Maximum speed | 130 km/h (81 mph) |
Traction system | Thyristor drive (1-5th batch) GTO-VVVF (6th batch onwards) |
Electric system(s) | 20 kV AC (50 Hz) |
Current collector(s) | Overhead line |
Safety system(s) | ATS-DN |
Multiple working | 731 series, 733 series, 735 series |
Track gauge | 1,067 mm (3 ft 6 in) |
The 721 series (721系) is an AC electric multiple unit (EMU) operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan since 1988.[1]
The trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).[2]
As of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.[3]