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British Rail Class 315 alternating current (AC) electric multiple units (EMU) were built by BREL York works from 1980 to 1981. They were the fifth and final variety of British Rail's then-standard 1972 design for suburban EMUs, which eventually encompassed 755 vehicles and five Classes (Class 313/314/315/507/508). Like the Glasgow-based Class 314 units, they are only able to operate from the 25 kV overhead line. The fleet works inner-suburban TfL-run services on the Shenfield Metro for TfL Rail and the Lea Valley Lines for London Overground out of London Liverpool Street. ==Description== Each Class 315 unit is formed of four vehicles, some vehicles are attached to another set of four vehicles to make 8 vehicles and some maybe attached to another four to make 12 vehicles on long distance journeys, such as ones to Southend Victoria or Southminster (Greater Anglia). The vehicles include: Driving Motor Standard Open (DMSO), Pantograph Trailer Standard Open (PTSO), Trailer Standard Open (TSO), and Driving Motor Standard Open (DMSO). Each DMSO carries four traction motors (315801-841 originally had Brush TM61-53 and 315842-861 had GEC G310AZ but these motors are interchangeable and nowadays any type can be found on any unit) rated at 110hp each and a main compressor and air reservoir which carries air for the brakes and suspension. The door system which was pneumatic has been replaced by an all electric door system. The PTSO carries the main and auxiliary transformers, batteries and battery charger, Stone Faiveley AMBR Mk.1 pantograph, vacuum circuit breaker and auxiliary compressor. The TSO carries no equipment other than that which is standard to all coaches. The coaches only contain standard seating and have no toilet facilities. Car numbering is as follows: *64461-64582 - DMSO *71281-71341 - PTSO *71389-71449 - TSO Each 4-car set is able to seat 318 passengers. A refurbishment programme commenced from mid-2004, when National Express East Anglia (then 'one' Railway) contracted Bombardier to carry out the refurbishment of all 61 units, starting with the ex-First Great Eastern examples. The low-back 3+2 seating is retained, so the capacity stays the same.〔(National Express invests in upgrade of class 315 fleet ) - National Express East Anglia. Retrieved 15 July 2011.〕 The Class 315 units replaced the life-expired Class 306 units. They will be displaced from Shenfield Metro work as part of Crossrail, and from Lea Valley services after they are taken over by London Overground. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「British Rail Class 315」の詳細全文を読む スポンサード リンク
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