p2other.gif (1207 bytes)p2.gif (1408 bytes)

Crocodile

Most light signals are provided with a crocodile. It makes a phusical contact with a passing train, hence transfering the signal's state to the driver's cabin.

Image05a.jpg (33708 bytes)

Crocodile

Each train carry in the bogie a brush that makes a physical contact with the crocodile. The crocodile can carry a positive or negative voltage (15V) depending on the signal status.

  1. When the trainengineer passes a green signal (proceed at line speed), the crocodile carries +15V. A bell will ring in the driver's cabin.

  2. When the trainengineer passes a yellow signal then:
    1) By old trains a pneumatic piston will fall, which the driver has to push back in the original position within 30 seconds.
    2) By new types, the trainengineer can confirm the signal just before or after passing the signal by pushing at a button.
    He must repeat the action for every double yellow, green yellow horizontal and green yellow vertical signal. When the trainengineer doesn't respond within 30 seconds an emergency brake will energise.

  3. A red signal will not be transferred to the cabin.
    Maybe strange!
    The crocodile can carry a negative (-15V) voltage when the signal is green and a positive (+15V) when the signal is yellow. When the signal is red the voltage over the crocodile is 0V. When the trainengineer passes a red signal, there is nothing that stops this train.

    There are several reasons:


Repeater signals with a light bar

dsc02317b.jpg (63189 bytes)
Bxl-train

dsc02317b.jpg (63189 bytes)
Peter.Honig

dsc02317b.jpg (63189 bytes)
ZoneTrainBelge

The signal is placed before the main signals when the visibility is poor. The light bar is steady or flashing according to the main signal that's steady or flashing.

repeat_1.gif (886 bytes) The main signal commands stop or proceed with a speed execution

repeat_2.gif (886 bytes) The main signal is clear

An example:

t001.gif (875 bytes)t_v_3t001.gif (875 bytes)
t003t_v_1t003

 


Repeater signals with lights

Not available yet.


AVG signal

The signal is placed on most platforms. The stationmaster can serve this signal when all passengers are boarded and the train is ready to leave the station.

avg_1.gif (901 bytes) >> after 7 sec. >> avg_2.gif (901 bytes)

../f/dsc00957.jpg (41646 bytes)
Bxl-train

 

i938
l2527.be



Markers

All signals are announced by countdown markers.

marke.gif (1578 bytes)

 

But mostly, and than I mean 95% of the signals are announced with only two markers. The markers of the opposite track are different.
marke.gif (1578 bytes)s112.gif (946 bytes)marke.gif (1578 bytes)s112.gif (946 bytes)
marke.gif (1578 bytes)s112.gif (946 bytes)marke.gif (1578 bytes)s112.gif (946 bytes)

When the signal can not give a "stop", the last marker doesn't have an extra dot.
marke.gif (1578 bytes)s112.gif (946 bytes)marke.gif (1578 bytes)s112.gif (946 bytes)
marke.gif (1578 bytes)s112.gif (946 bytes)marke.gif (1578 bytes)s112.gif (946 bytes)

When the main signal doesn't have a distant signal the markers are different.

  1. When the reference speed is less than 40km/h
    marke.gif (1578 bytes)

  2. When the reference speed is between 40 and 60km/h
    marke5.gif (1578 bytes)

  3. When the reference speed is more than 60km/h
    There must a distant signal

 

image01a.jpg (23171 bytes)

image02b.jpg (20356 bytes)

Genk Kolenhaven

Genk Kolenhaven


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