Toei 12-600 series

The Toei 12-600 series (read as 12,600) is a Japanese linear-motored city commuter electric multiple unit operated by the Tokyo Metropolitan Bureau of Transportation since February 2012.
==History==
The 12-600 series was developed as a result of the Tokyo Metropolitan Bureau of Transportation's business plan introduced in 2010, in addition to attempting to reduce congestion on the Toei Ōedo Line. Originally, two eight-car sets were built and entered service in February 2012. The latest batch of sets entered service on 15 February 2019.
==Design==
The 12-000 series uses a fairly modern design with a body made of an extruded aluminum alloy. The sets use unpainted aluminum bodies. The ninth sets and onwards used a different headlight setup, with a dual headlight-taillight fixture; as opposed to shield-beam headlights as used on the first eight sets, these use LED fixtures.
===Variations===
;Cab design variations
There are three cab design variations of the 12-600 series; one resembles the older 12-000 series and is used on the first two sets, the second is used on the remaining sets and the third is used on the ninth set and onwards.
Toei 12-600 620 Daimon 2015.jpg|Set 12-621 at Daimon Station in May 2015
Toei 12-600 630 Ōedo 2017.jpg|Set 12-631 at Roppongi Station in April 2015
==Specifications==
Construction is of an extruded aluminum alloy. End cars are 16.75 meters long, 2.49 meters wide and 3.14 meters high.
The sets use two-level Hitachi insulated gate bipolar transistor inverters which produce a hissing noise. The use of linear motors in the sets gave the sets an extremely unique droning noise once the sets reached high enough a speed; this characteristic is only found on linear-motored trainsets. 
In addition to the odd-sounding motors, the linear motor system does provide some benefits, such as allowing for smaller cars and tunnels; however, this disallows the 12-600 series sets from performing through-running to and from other lines due to technological incompatibilities, in addition to most other lines having technology that only works with rotary-motored trains.
While it is technically possible for rotary-motored trains to operate on the Ōedo Line, where the 12-600 series sets see service, a different loading gauge, track gauge and smaller tunnels prevent such occurrences.
==References==
*Wikipedia.org
Category:Electric trainsets
Category:Toei trains
Category:Kawasaki locomotives
Category:Nippon Sharyo locomotives