E721 series
| E721/SAT721 series | |
|---|---|
E721-0 series (right) and SAT721 series (left), August 2007
|
|
| In service | February 2007–Present |
| Manufacturer | Kawasaki Heavy Industries, Tokyu Car Corporation, J-TREC (Niitsu and Yokohama) |
| Replaced | 455 series, 417 series, 717 series, 719 series |
| Constructed | 2006–2017 |
| Number under construction | 36 vehicles (9 sets) |
| Number built | 142 vehicles (61 sets) |
| Number in service | 138 vehicles (59 sets) |
| Number scrapped | 4 vehicles (2 sets) |
| Formation | 2/4 cars per set |
| Fleet numbers | P1–P44, P501–P504, P4-1–P4-19, SA101–SA103 |
| Operator(s) | JR East |
| Depot(s) | Sendai |
| Line(s) served | |
| Specifications | |
| Car body construction | Stainless steel |
| Car length | 20,000 mm (65 ft 7 in) |
| Width | 2,950 mm (9 ft 8 in) |
| Floor height | 950 mm (3 ft 1 in) |
| Doors | 3 pairs per side |
| Maximum speed | 120 km/h (75 mph) |
| Power output | 500 kW per motor |
| Electric system(s) | 20 kV AC (50Hz) |
| Current collection method | overhead catenary |
| Bogies | DT72 (motored), TR256 (trailer) |
| Safety system(s) | ATS-Ps |
| Multiple working | 701 series |
| Track gauge | 1,067 mm (3 ft 6 in) |
The E721 series (E721系?) is an electric multiple unit (EMU) train type operated by East Japan Railway Company (JR East) on services in the Sendai area of Japan since February 2007.
E721-0 series set P-4 in March 2007
E721-500 series set P-502 in November 2007
E721-1000 series set P4-14 in January 2017
SAT721 series set SA102 in March 2008
As of 1 October 2015[update], the fleet consists of 42 two-car E721-0 series sets (P-2 to P-44), four E721-500 series two-car sets (P-501 to P-504), and three SAT721 series two-car sets (SA101 to SA103), formed as follows with one motored (Mc) and one trailer (Tc') car.
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
The 19 four-car E721-1000 series sets (P4-1 to P4-19) are formed as follows, with two motored ("M") cars and two non-powered trailer ("T") cars. The KuHa E720 is located at the southern end.
The two motored cars (KuMoHa and MoHa) each have one PS109 single-arm pantograph. The KuHa cars have a toilet.
The interior of car KuMoHa E721-1005 of set P4-5 in January 2017
An LED passenger information panel above the doorway in car KuMoHa E721-1005 of set P4-5 in January 2017
The two-car SAT721 series sets are formed as follows.
The KuMoHa cars have one PS109 single-arm pantograph. The KuHa cars have a toilet.
The first E721-0 series sets were delivered from December 2006, and entered service on 1 February 2007 on Tohoku Main Line services. The first E721-500 and SAT721 series sets were delivered from February 2006 and entered service on Sendai Airport services on 18 March 2007.
Two sets, P-1 and P-19, were derailed and badly damaged by the 2011 Tōhoku earthquake and tsunami on 11 March 2011 while at Shinchi Station, and were withdrawn.
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