In 2009, JR East developed E233-2000 series DC electric multiple unit (EMU)
trains in order to replace superannuated 203 series EMU and 207-900 series
EMU used on Johban Line and Tokyo Metro Chiyoda Line interrunning services.
6 out of 10 cars are powered.
The vehicle design incorporates stainless steel construction for light
weight, featuring flat-sided narrow body, provided for converging with
the underground railway. The floor height is lowered to 1,130 mm for improved
accessibility, compared to 1,200 mm for 203 series trains. End cars are
equipped with an emergency door in front of them. They feature DT71A/TR255/TR255A
bogies, adopting the bolster-less air suspension and axle arm type journal
box supporting system, and preparing anti-yaw dampers for improved stability.
As for the device of driving cab, one handle master controller operated
by the left hand was adopted. ATC device is fitted under the floor of the
end cars.
8 asynchronous motors, MT73, rated at 140kW are controlled by 2-level AVAF
inverter traction system, SC85B, on 2 cars collective to realize high maximum
service speed at 120km/h and high acceleration performance at 3.3km/h/s,
employing fields-oriented control and Intelligent Power Module (IPM). E233-2000
features the electric commanding brake with regenerative brake. Commands
of service braking are carried by TIMS. Braking on formation basis by TIMS
realizes regeneration rate improvement. Current collectors are single-arm
type.
Passenger accommodation is cantilever type longitudinal seating. All Windows
located between doors can be opened. E233-2000 series adopt heat ray absorption
windowpanes so blinds are discontinued. The spaces for the wheelchair are
located in cars No. 2 and 8. Door operating equipment is driven by the
electricity. The air conditioner is AU726A-G3 rated at 50,000kcal/h. 17"
wide liquid-crystal display screens are used for providing passenger information.
180 vehicles were built and are now used on Johban Line and Tokyo Metro Chiyoda Line interrunning services. |
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