 Each three @-@ car unit has 138 seats , and a total capacity of 493 riders . There are three doors on each side of each car , measuring 1 @,@ 300 millimeters ( 4 ft 3 in ) wide and 1 @,@ 900 millimeters ( 6 ft 3 in ) high . In service , the units either run single ( with three cars ) or two units in multiple ( with six cars ) . Each car is equipped with four three @-@ phase asynchronous 140 @-@ kilowatt ( 190 hp ) motors , giving each three @-@ car unit a power output of 1 @,@ 680 kilowatts ( 2 @,@ 250 hp ) . 
