Sotetsu 8000 series

Sotetsu 8000 series
300px 8000 series EMU in original livery
In service	1990–Present
Manufacturer	Hitachi
Number built	130 vehicles (13 sets)
Number in service	120 vehicles (12 sets)
Number scrapped	10 vehicles (set 8707, accident damage)
Formation	10 cars per set
Fleet numbers	8701 - 8713
Operator(s)	Sotetsu
Depot(s)	Kashiwadai depot
Specifications
Car body construction	Aluminium
Car length	20 m
Width	2930 mm
Doors	4 pairs per side
Maximum speed	110 km/h
Transmission	49:10
Acceleration	3.0 km/h/s
Electric system(s)	1,500 V DC
Bogies	Hitachi KH series
Braking system(s)	Brake by wire
Safety system(s)	Sotetsu ATS Dead man's switch
Track gauge	1,067 mm

File:Sotetsu 8000 BoxSeat.jpg

Transverse seating bay

The Sotetsu 8000 series (相鉄8000系) is a DC electric multiple unit (EMU) train type operated by Sagami Railway (Sotetsu) in Kanagawa Prefecture, Japan. They were designed to connect and operate as 10-car sets.

Body

They use a lightweight aluminium body. The design has changed to a practical design as modern, big pilot and non-symmetrical front design, etc.

Interior design

The basic color is white and all doors are colored white, too. Some cars have transverse seating.

Electrical equipment

The motor system is based on the New 7000 series.

This series adopted variable-frequency drive motors named "Hitachi HSV-03"; the motor power is 150 kW and installed as 4 motors per car. Power cars are two cars as one pair. The 8100 car establishes the VFD-controller, and the 8200 car establishes a compressor, etc.

The brake system was finished with Hitachi HSC and adopted brake by wire with regenerative brake.

Bogies are based on the New 7000 series, too. The name is "KH132B" (for power cars) and "KH135B" (for others). They have stand out disc brakes.

Safety system

The safety system uses a dead man's switch and automatic train stop.

Formation

As of 1 April 2015, the fleet consists of 12 ten-car sets, formed as follows.

8701 - 8707

	←Yokohama StationEbina Station/Shonandai Station→
Car No.	1	2	3	4	5	6	7	8	9	10
Numbering	8700 (Tc2)	8100 (M1)	8200 (M2)	8600 (T2)	8100 (Ms1) ★	8200 (M2)	8600 (T1)	8100 (Ms1) ★	8200 (M2)	8500 (Tc1)
Equipment		CONT, PT	MG, CP, PT		CONT, PT	MG, CP, PT		CONT, PT	MG, CP, PT

8708 - 8713

	←YokohamaEbina/Shonandai→
Car No.	1	2	3	4	5	6	7	8	9	10
Numbering	8700 (Tc2)	8100 (M1)	8200 (M2)	8600 (T2)	8100 (Ms1) ★	8200 (M2)	8600 (T1)	8100 (Ms1) ★	8200 (M2)	8500 (Tc1)
Equipment		CONT, PT	CP, PT	SIV	CONT, PT	CP, PT	SIV	CONT, PT	CP, PT

Key:

• CONT：VFD controller (1 Controller operates 2 cars, 8 Motors. 1C8M)
• MG：Motor-generator
• SIV：Inverter (electrical)
• CP：Reciprocating compressor
• PT：pantograph
• ★ Transverse seating

History

A total of 130 cars were built between 1990 and 2000 by Hitachi in Yamaguchi Prefecture. They replaced many of the aging 6000 series and new 6000 series sets.

Set 8707 was involved in a collision with a track maintenance vehicle in March 2004, at Shonandai Station, and was scrapped in 2006. The set was replaced by a newer Sotetsu 10000 series set.

Refurbishment

Body

• The air conditioners were changed to new type, freon type which do not affect the Earth's ozone layer.
• Some diamond-shaped pantographs were changed to single-arm.
• In 2007, body painting began to be changed to a new color.
• From 2007, coloring was changed to be like the Sotetsu 10000 series. The new coloring uses base color white and blue and orange.

Interior design

• Some early formations do not have wheelchair space, so it was added in the 8700 and 8500 cars.
• Some early formations do not have a doorbell, so all car doors were made the same.
• The normal seats were changed to bucket seats　and coloring changed from orange to purple.
• Both ends of the seat were attached to white partition board and a curved pole.

Safety system

• ATS was changed from original type to the same type as the East Japan Railway Company.
• A new safety system was established. If no control in one minute, then the emergency brake engages and the train stops. This system is named by Japan "EB".