Copenhagen Metro - Trains

Trains

The system uses 34 driverless electric multiple units built by AnsaldoBreda and designed by Giugiaro Design of Italy.

The trains are 39 m (128 ft) long, 2.65 m (8 ft 8 in) wide, and weigh 52 tonnes (51 long tons; 57 short tons). Each train consists of three articulated cars with a total of six automated, 1.6 m (5 ft 3 in) wide doors, holding up to 96 seated and 204 standing passengers. There are four large 'flex areas' in each train with folding seats providing space for wheelchairs, strollers and bicycles.

Each car is equipped with two three-phase asynchronous 105-kilowatt (141 hp) motors, giving each train a power output of 630 kilowatts (840 hp). In each car, the two motors are fed by the car's own insulated-gate bipolar transistor. They transform the 750-volt direct current collected from the third rail shoe to the three-phase alternating current used in the motors. The trains' top speed are 80 km/h (50 mph), while the average service speed is 40 km/h (25 mph), with an acceleration and deceleration capacity of 1.3 m/s2 (4.3 ft/s2) along the standard-gauge track.

The entire metro system and the trains are run by a fully automated computer system, located at the Control and Maintenance Center south of Vestamanger Station. The automatic train control (ATC) consists of three subsystems: automatic train protection (ATP), automatic train operation (ATO) and automatic train supervisory (ATS). The ATP is responsible for keeping the trains' speed, ensuring that doors are closed before departure and switches are correctly set. The system uses fixed block signaling, except around stations, where moving block signaling is used.

The ATO is the autopilot that runs the trains on a predefined schedule, ensures that the trains stop at the station and open the doors. The ATS keeps track of all the components in the network, including the rails and all of the trains in the system, and displays a live schematic at the control center. The ATC is designed so that the ATP is the only safety-critical system, as it would halt the trains if the other systems fail. The safety and signaling specifications are based on the German BOStrab, and controlled by TÜV Rheinland and Det Norske Veritas under supervision of the Public Transport Authority. Other aspects of the system, such as power supply, ventilation, security alarms, cameras and pumps, are controlled by a system called "control, regulating and surveillance".

The Control and Maintenance Center is a 1.1-hectare (2.7-acre) facility located at the south end of M1. It consists of a storage area for trains not in use, a maintenance area and the control facility. Trains operate automatically through the system, and can also automatically be washed on the exterior. The facility has 5 km (3.1 mi) of track, of which 800 m (870 yd) is a test track for use after maintenance. The most common repairs are wheel grinding; more complicated repairs are made by replacing entire components that are sent to the manufacturer. By having components in reserve, trains can have shorter maintenance time. The depot also has several maintenance trains, including diesel locomotives that are able retrieve broken down or disabled trains.

At any time, there are four people working at the control center: two monitor the ATC system, one monitors passenger information, and one is responsible for secondary systems, such as power supply. In case of technical problems, there is always a team of linemen that can be dispatched to perform repairs. Although the trains are not equipped with drivers, there are stewards at stations and on some trains that help passengers, perform ticket controls and assist in emergency situations.