721-2100series
-0 subseries
-2100 subseries
-3000 subseries
-3100 subseries
-4000 subseries
-5000 subseries
Type
index
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Some 721-0 series fleets began to be fitted the AVAF inverter traction system and ac 3-phase asynchronous motors, N-MT721A, rated at 250kW and they were classified into -2100 sub-series from 2010. Brake resistors are removed because of the change of brake system. Because of these modifications, the motored end cars were changed into trailer.
Now 721-2100 series are used on the rural services in the suburbs of Sapporo. |
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| Technical Data |
| Items |
Data |
| Supply Voltage |
20000VAC,
50Hz |
| Service
speed, etc. |
Acceleration: 2.4km/h/s Deceleration: 4.1km/h/s Service speed: 120km/h |
| Length |
20800mm |
| Width |
2954mm |
| Height |
3670mm |
| Bogie |
N-DT721
(motored) N-TR721 (trailer) |
| Collector |
N-PS785 |
| Traction
motor |
N-MT721A (250kW) |
| Gear ratio |
5.6 |
| Transformer |
N-TM721A-AN |
| Rectifier |
N-CI721-1 |
| Traction system |
AVAF inverter : N-CI721-1 |
| Air conditioner |
N-AU721
(20000kcal/h×1) |
| Designed
by |
JR Hokkaido |
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