New concepts for track safety
Public transport is characterised by constant change, such as necessary track work or changes to the line layout. To support these complex projects, HANNING & KAHL offers a new type of transportable single-line track safety devices (EGS) – robust and individually configurable. By Kay Klöcker
If two-track operation is not possible due to construction work, driving operations are regulated by single-line track-safety devices. The new transportable EGS, like the stationary signalling installations from HANNING & KAHL, ensures safe operations and is user-friendly.
Control cabinets
The control equipment is located in robust master/slave control cabinets. However, it is not always necessary to use both controllers. For example, the operating modes short turnaround and reversal operation are only possible via the master control cabinet. In the cabinet, there is a terminal for direct connection alongside the elements of the external equipment provided with plugs. An LTE router is available for remote data readout and diagnostics. The system can also be equipped with a VABtrack interface on customer request. Both cabinets have a traffic light interface (relay outputs) and a track diagram stage. Operating voltages of DC 750 V as well as AC 230 V are possible. Additional safety is provided by a monitored rechargeable battery that can supply the equipment with power for around 60 minutes. Vehicle detection can either be performed using overhead line contacts or HCS loops.
Robust control cabinet base
HANNING & KAHL uses a galvanised, trapezoidal welded construction as control cabinet base, which allows the cabinet to be mounted securely and the installation cables to be fed freely from below. The construction is particularly robust to ensure protection against the effects of weather and vandalism. Both the sides as well as the back of the frame are lined with sheet metal, and the cabinet is firmly connected to the frame with threaded bolts. The entire structure can be moved using forklift prongs. Additional eyebolts are attached to the frame for easy transport. Connection bolts for earthing terminals add a final touch to the equipment.
Mobile signal masts and point heaters
Signalling is performed via two dismountable 320 cm high masts. These consist of a stable signal base (according to ZTV-SA97), weights and a signal mast made of glass fibre reinforced plastic to accommodate the signal transmitters of the signalling installation. All vehicles on the track are counted and displayed to the waiting vehicle on the signal mast. Monitored F0/F1 signal aspects are a matter of course. By the way, the 30 m long connection cable can be safely stored in a cable drum that can be suspended on the signal masts. All cables are pluggable.
Moreover, a point heater with two heating elements each which ensures the function of the points on site even in winter is integrated in the master/slave cabinets. Thanks to a VABtrack telecontrol interface, the heating elements of the point heater can be monitored continuously.
Track diagram stages
Track diagram stages can be used to set and cancel routes. Normal operation can be switched back on with both track diagram stages. The statuses of the individual elements of the system, such as signal statuses, HCS loops and overhead line contacts are reported back and visualised on the track diagram stage.
Operating modes of the EGS
The operating modes can be easily selected using a selector switch on the track diagram stage. Numerous options are possible, ranging from runs in alternating operation with and without priority at the ends, short turnarounds and reversal operation, as well as entry and exit at the same head end with change of direction, to following train runs with parameterisable number and time of following trains. Moreover, test runs for system configurations can be performed with one or two control cabinets.