715-0 series
Background and overview
Japanese National Railways needed a large amount of additional suburban
AC electric multiple unit (EMU) for the additional capacity to replace
diesel multiple unit (DMU) trains and locomotive-hauled trains and improve
the frequency of rural services of AC electrified lines. However, budget
restraints of Japanese National Railways (JNR) prevented the construction
of new vehicles. So, JNR remodeled surplus 581 series intercity dual voltage
AC/DC electric multiple unit (EMU) trains allocated at Mukomachi depot
in Kyoto into suburban EMU trains and classified them into 715 series.
12 four-car sets consisting of 2 powered vehicles and 2 trailer vehicles
were delivered in 1983.
Car body
Their car body carried from former 581 series differ from original body
in having additional doorways, and introducing double-hung unit assembled
windows converted from some original fixed windows. Small windows fitted
on the body side for upper and middle bunks were remained. Lacked end vehicles
caused by shorting the sets of 581 series were filled up trailer intermediate
vehicles, class sahane581, by jointing the additional cab section. End
vehicles on Nagasaki/Haiki side are classified into class kuha714 and end
vehicles on Moji side are classified into class kuha715-100. Original folding
doors are remained and additional folding doors are fitted. Their door
operating equipment is TK7A. Their livery was cream with a horizontal green
band below the windows.
Class moha715-0
An additional folding door is fitted where the section of toilets and washrooms
on the front of class mohane581 is cut off. Nine air conditioners, AU15,
rated at 2,700kcal/h/unit and forced draught ventilators are fitted on
their roof.
Class moha714-0
An additional folding door is fitted where the section of toilets and washrooms
on the front of class mohane580 is cut off. Four air conditioners, AU15,
rated at 2,700kcal/h/unit, forced draught ventilators are fitted on their
roof. Three air conditioners, AU41, rated at 4,000kcal/h are also fitted
on the floor.
Class kuha715-0
A side window toward end of trailer end vehicle, class kuhane581 is changed into additional doorways. Eight air conditioners, AU15, rated at 2,700kcal/h/unit and forced draught ventilators are fitted on their roof. This vehicle is coupled on Nagasaki/Haiki side.
Class kuha715-100
An additional cab section is fitted where the section of toilets and washrooms
at the front of class sahane581 is cut off. A side window at the front
of the vehicle is also changed into an additional doorway. Nine air conditioners,
AU15, rated at 2,700kcal/h/unit and forced draught ventilators are fitted
on their roof. This vehicle is coupled on Moji side.
Class kuha714-0
An additional cab section is fitted where the section of a doorway at the end of class sahane581 are cut off. Two side windows at the front and toward end of the vehicle are also changed into additional doorways. Nine air conditioners, AU15, rated at 2,700kcal/h/unit and forced draught ventilators are fitted on their roof. This vehicle is coupled on Moji side.
Bogies
Their powered bogie was remodeled from the powered bogie, DT32D, of former
581 series EMU and classified into DT32K. DT32K differs from DT32D in having
higher reduction gear ratio at 5.6. The trailer bogie was carried from
former 581 series EMU as it stands, employing airbags for the secondary
suspension, pedestal type journal supporting system, and the anti-rolling
stabilizer of the torsion bar. Their secondary airbag suspension is not
mounted to their body directly but mounted in the bogie unit. Their brake
rigging is a single tread brake for powered and double disk brake for trailer.
Traction unit and ancillary equipments
Their traction unit was carried from former 581 series EMU. Eight powerful series-wound brushed DC traction motors, MT54 or MT54B, with a power output of 120kW are controlled by armature-resistance traction control system, CS15C, fitted to intermediate cars, class Moha715-0. Since the reduction gear ratio at 3.5 of former 581 series EMU is not appropriate for use on ordinary services, their traction gear unit was changed into another traction gear unit transplanted from scrapped 101 series EMU used on commuter services. Class moha714-0 vehicles are equipped with a traction rectifier, RS22A, and a traction transformer, TM10, to operate under only 60Hz under their floor, and a diamond shaped current pickup, PS16D, for high voltage and an air-blast circuit-breaker on their roof. Another current pickup and AC-DC switcher is removed. Class kuha715-0 vehicles are equipped with a motor generator, MH93B-DM55B, with a power output of 150kVA and an air compressor, MH113A-C2000 in the equipment room behind the cab. On the other hand, class kuha714-0 vehicles remodeled from trailer intermediate vehicles are equipped with a motor generator, MH128D-DM85D, with a power output of 110kVA and an air compressor, MH113B-C2000M under their floor. They are transplanted from scrapped vehicles. 715-0 series adopt electromagnetic straight pneumatic brake with the rheostatic brake.
Accommodation
Seating is arranged as mixture of longitudinal bench seating and transverse
seating bays with 1970mm seating pitch. Six transverse seating bays of
class moha714-0 vehicles, and eight of the others fitted at the centre
of the passenger cabin are carried from former 581 series EMU. Longitudinal
bench seating, hand straps, and hand rails are fitted where other original
transverse seating bays were removed. Original venetian blinds are fitted
for fixed windows and roller blinds for double-hung windows. Class kuha715-0
vehicles and class kuha714 vehicles are equipped with a Japanese style
toilet carried from 581 series. The other toilet is locked and the wash
rooms located across the aisle from the toilet are removed and the cover
is fitted where wash rooms are located.
Operations
715-0 series entered the rural revenue services of Kagoshima line between Hakata and Tosu, Nagawaki and Sasebo lines in February, 1984. Their service area was extended to Kagoshima line between Fukuma and Hakata, and Kagoshima line between Tosu and Araki. They had been also used on "Furusato (birthplace) liner Nagasaki/Sasebo/Kumamoto/Oita" , "Holiday Nagasaki/Sasebo/Kumamoto", and "Hinokini" temporary express services.
Modification
Their livery was changed into light cream with a blue waistline and headline
band running the length of each car below and above the windows in 1986.
Small windows fitted on the body side for upper and middle bunks started
to be filled with the plate by welding in 1985.
Withdrawal
715-0 series started to be replaced with 813 series EMU introduced from 1996 and were completely withdrawn in 1998.
715-1000 series
Background and overview
Japanese National Railways remodeled surplus 583 series intercity dual voltage AC/DC electric multiple unit (EMU) trains allocated at Mukomachi depot in Kyoto into suburban EMU trains in order to replace diesel multiple unit (DMU) trains and locomotive-hauled trains and improve the frequency of rural services in Sendai region and classified them into 715-1000 series. 15 four-car sets consisting of 2 powered vehicles and 2 trailer vehicles were delivered in 1984.
Car body
Their car body carried from former 583 series differ from original body
in having additional doorways, and introducing double-hung unit assembled
windows converted from some original fixed windows. Small windows fitted
on the body side for upper and middle bunks were filled with the plate
by welding. Lacked end vehicles caused by shorting the sets of 583 series
were filled up trailer intermediate vehicles, class sahane581, by jointing
the additional cab section and classified into class kuha715-1100. Original
folding doors are remained and additional folding doors are fitted. Their
door operating equipment is TK7A, which can open/close manually to prevent
the passenger's saloon from being cold in winter. Their livery was cream
with a horizontal green band below the windows.
Class moha715-1000
An additional folding door is fitted where the section of toilets and washrooms
on the front of class mohane583 is cut off. Nine air conditioners, AU15,
rated at 2,700kcal/h/unit and forced draught ventilators are fitted on
their roof.
Class moha714-1000
An additional folding door is fitted where the section of toilets and washrooms
on the front of class mohane582 is cut off. Four air conditioners, AU15,
rated at 2,700kcal/h/unit, forced draught ventilators are fitted on their
roof. Three air conditioners, AU41, rated at 4,000kcal/h are also fitted
on the floor.
Class kuha715-1000
A side window toward end of trailer end vehicle, class kuhane581 is changed into additional doorway. Eight air conditioners, AU15, rated at 2,700kcal/h/unit and forced draught ventilators are fitted on their roof. This vehicle is coupled on Kuroiso side.
Class kuha715-1100
An additional cab section is fitted where the section of toilets and washrooms
at the front of class sahane581 is cut off. A side window at the front
of the vehicle is also changed into an additional doorway. Nine air conditioners,
AU15, rated at 2,700kcal/h/unit and forced draught ventilators are fitted
on their roof. This vehicle is coupled on Ichinoseki side.
Traction unit and ancillary equipments
Their traction unit was carried from former 583 series EMU. Eight powerful
series-wound brushed DC traction motors, MT54B or MT54D, with a power output
of 120kW are controlled by armature-resistance traction control system,
CS15E, fitted to intermediate cars, class Moha715-1000. Since the reduction
gear ratio at 3.5 of former 583 series EMU is not appropriate for use on
ordinary services, their traction gear unit was changed into another traction
gear unit transplanted from scrapped 101 series EMU used on commuter services.
Class moha714-1000 vehicles are equipped with a traction rectifier, RS22,
and a traction transformer, TM20, to operate under both 50Hz and 60Hz under
their floor, and a diamond shaped current pickup, PS16H, for high voltage
and an air-blast circuit-breaker on their roof. Another current pickup
and AC-DC switcher is removed. Class kuha715-1000 vehicles are equipped
with a motor generator, MH93B-DM55B, with a power output of 150kVA and
an air compressor, MH113A-C2000 in the equipment room behind the cab. 715-1000
series adopt electromagnetic straight air brake with the rheostatic brake.
Accommodation
Seating is arranged as mixture of longitudinal bench seating and transverse
seating bays with 1970mm seating pitch. Six transverse seating bays of
class moha714-1000 vehicles, and eight of the others fitted at the centre
of the passenger cabin are carried from former 583 series EMU. Longitudinal
bench seating, hand straps, and hand rails are fitted where other original
transverse seating bays were removed, and wind shields are fitted at the
doorways. Original venetian blinds are fitted for fixed windows and roller
blinds for double-hung windows. Class kuha715-1000 vehicles are equipped
with two Japanese style toilets carried from 583 series. The wash rooms
located across the aisle from the toilet are removed and the cover is fitted
where wash rooms are located.
Operations
715-1000 series entered the rural revenue services of Tohoku line between
Kuroiso and Ichinoseki, and Oou line between Fukushima and Niwasaka in
March, 1985. But they were withdrawn from Oou line because of the start
of regauge work in November, 1991.
Modification
Remained middle bunks of some vehicles were removed.
Withdrawal
715-1000 series started to be replaced with 701 series EMU introduced from 1995 and were completely withdrawn in 1998. |
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