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New Zealand DM class electric multiple unit
The New Zealand DM/D class (also known as English Electrics) were a class of electric multiple units used on the Metlink suburban rail network of Wellington, New Zealand. Formed of DM power cars and D trailer cars, the first units were ordered from English Electric in 1936 and introduced on 2 July 1938 operating the electrified Johnsonville Line service. Additional units were ordered in 1942 and 1946 as other Wellington suburban lines were electrified.
The units were relegated to peak services and the Johnsonville Line after the arrival of the "Ganz Mavag" EM/ET units in 1982-83, before finally being replaced by the "Matangi" FP/FT units in 2011-12. The units operated their last revenue service on 25 June 2012, from Wellington to Melling and return. Five complete units (four two-car and one three-car) and six trailer cars have been preserved.
==Introduction==
Following its decision to build the Tawa Flat deviation to replace the original ex-Wellington & Manawatu Railway North Island Main Trunk alignment out of Wellington, the New Zealand Railways Department (NZR) decided to convert the remaining 10.49km of track between Wellington and Johnsonville into an electrified suburban branch line. Six two-car trains comprising one driving motor car and one driving trailer were ordered from English Electric in 1936 to work the future Johnsonville Line, which formally 'opened' as a branch line on 2 July 1938 with the new electric trains inaugurating the service. The new trains were allocated as the DM class (driving motor cars) and the D class (non-motored driving trailer).
Due to traffic growth both on the Johnsonville Branch and with further electrification in the Wellington suburban area, two further orders were placed with English Electric for further trains of this type; three motor cars and two trailers were ordered in 1942 and delivered in 1946 following the end of the Second World War, while forty motor cars and seventy-one trailers were ordered in 1946 and delivered from 1949 onwards to work the Paekakariki and later Upper Hutt services. Due to the limited number of these trains, NZR were required to run additional locomotive-hauled carriage trains until the arrival of the first Ganz Mavag EM/ET units in 1982.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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