Technical characteristics

The Mk 5A sets are fitted with couplers on the outermost vehicles with standard draw hook and shackle, buffers and twin air-brake pipes. Inter-vehicle couplings use a semi-permanent rigid bar.

Each coach has two passenger doors per vehicle apart from the Trailer First, which has one. They are all fitted with automatic sliding plug doors with enhanced sensitive edge technology. This remains active for a period of time after door interlock is established, to allow increased detection of objects trapped.

The coaches are fitted with Automatic Selective Door Opening (ASDO) based on GPS positioning. If required, these are supported by track-based beacons.

There are operational door controls in the Driver Trailer and ‘68’ cabs, which the driver controls. There is a minimum of two door control panels (with PA/ crew call unit) in every vehicle for use by the conductor.

The auxiliary power supply offers either 1,000V AC from shore supply or 900V DC from the ‘68’.

The coaches’ bogies have an inside-frame and an inboard axle journal bearing design with on-board hot axle box detection.

The stock is fitted with axlemounted disc braking, airoperated by standard UIC 2-pipe arrangement. There is a springapplied parking brake.

Wheel Slip Protection (WSP) with sanding is available via the third axle of the DTS coach, while the Class 68s are fitted with sanders.

An automatic passenger count system has been fitted to each coach and this updates after each stop. WiFi is also fitted.