721-3100 series
-0 subseries
-2100 subseries
-3000 subseries
-3100 subseries
-4000 subseries
-5000 subseries
Type index
Photos
 721-3100 (AVAF) |
|
Due to the popularity of the "Airport" rapid services, some formations
were increased to 6 cars from 1992 with the addition of extra type Moha720
intermediate motored vehicles and Saha721 intermediate trailer vehicles.
721 series vehicles delivered as 6-car formations are classified into -100
sub-series.
Some seats of saha721 used on airport rapid services had been changed to
adjustable reclining seats for reservation services in 2000.
Some 721-100 series vehicles were upgraded to 130km/h capability and classified into -3100 sub-series, with the start of 130km/h operations of "Airport" rapid services from 2002.
Some 721-3100 series fleets began to be fitted the AVAF inverter traction system and ac 3-phase asynchronous motors, N-MT721A, rated at 250kW, 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 and moha720 intermediate motored cars were changed into Saha721 intermediate trailer cars.
Now 721-3100 series are used on the "Airport" rapid services linking Otaru/Sapporo and New Chitose Airport. |
|
| Technical Data (Thyristor phase control) |
| Items |
Data |
| Supply Voltage |
20000VAC,
50Hz |
| Service
speed, etc. |
Acceleration:
2.4km/h/s Deceleration: 4.1km/h/s Service speed: 130km/h |
| Length |
20800mm |
| Width |
2954mm |
| Height |
3670mm |
| Bogie |
N-DT721
(motored) N-TR721 (trailer) |
| Collector |
N-PS721 |
| Traction
motor |
N-MT721
(150kW) |
| Gear ratio |
4.82 |
| Transformer |
N-TM721 |
| Rectifier |
N-RS721 |
| Traction system |
Thyristor phase control : N-CS721 |
| Air conditioner |
N-AU721
(20000kcal/h×1) |
| Designed
by |
JR Hokkaido |
| Technical Data (AVAF control) |
| Items |
Data |
| Supply Voltage |
20000VAC,
50Hz |
| Service speed,
etc. |
Acceleration:
2.4km/h/s Deceleration: 4.1km/h/s Service speed: 130km/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 |
|
|
