Nagoya Municipal Subway 3050 series
The is a rapid transit electric multiple unit (EMU) operated by the Transportation Bureau City of Nagoya on the Nagoya Subway Tsurumai Line in Japan since 1993. Design. Like other modern cars on the Nagoya Subway lines, the 3050 series uses a variable-frequency drive controller to convert DC current to AC current to power a squirrel cage motor. Formation. The trainsets are formed as follows. One set was formed by using two surplus 3000 series cars.