AC/DC dual voltage 451/453/455 series trains, which were built for use
on express services, were transferred to suburban local services with reduction
of express services after the start of operations on the Tohoku Shinkansen.
The accommodation of these superannuated vehicles was not fit for the suburban
local services. In 1986, Japanese National Railways (JNR) decided to refurbish
451/453 series by transplanting the new bodies and utilizing the traction
system and bogies, instead of the introduction of 417 series or 713 series.
These refurbished vehicles are classified into 717 series.
717 series vehicles differ from other sub-urban trains in having 2 doors on each side of the body in place of 3doors. 717 series incorporated a step at the doorway because they run on the lines of which platforms are low. 717 series adopt the semi-automatic doors that can be open manually to prevent the passenger's room being cold in winter. The equipment to remove airborne snow from intake air is different from that of 417 series. Traction motors, MT46 rated at 100kW, of the vehicles which 451 series were remodeled into are changed into MT54 rated at 120kW. The circuit designed for AC/DC dual voltage is locked to only AC circuit. Holding brake system is not adopted. Vehicles which 453 series were remodeled into are classified into -100 sub-series, because of adopting the different resistor from that of 451 series. Bogies are same DT32/TR69 as those of 451/453 series.
Since the air conditioners were utilized from 451/453 series, the end cars
are equipped with distributed air conditioners and the intermediate cars
are concentrated air conditioners. Kuha716 (end trailer cars) are equipped
with the Auxiliary power supply equipment. Destination indicator screens
are located on the each side of the body. A toilet, which Kuha716 vehicles
are equipped with, is located at the different position from that of the
other suburban trains because of utilizing the toilet sewage treatment
equipment. 717 series adopt the semi-automatic doors that can be open manually
to prevent the passenger's room being cold in winter.
717 series have been used on the local services of the Joban line near
Sendai. All 717 series vehicles were withdrawn by the displacement to E721
series and E531 series. |
|
| Technical Data |
| Items |
Data |
| Supply
Voltage |
20000VAC, 50Hz |
| Service
speed, etc. |
Service speed: 110km/h |
| Length |
19500mm |
| Width |
2900mm |
| Height |
3654mm |
| Bogie |
DT32, DT32B (motored) TR69, TR69B (trailer) |
| Collector |
PS16B |
| Traction
motor |
MT54B, MT54D (120kW) |
| Gear
ratio |
4.21 |
| Transformer |
TM20 |
| Rectifier |
RS22A |
| Traction system |
Armature-resistance control: (CS15) |
| Air
conditioner |
End cars: AU13E (5,500kcal×6), Intermediate cars: AU72 (33, 000kcal) |
| Designed
by |
Japanese National Railways |
|
|
