Brake panel

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In the railway sector , a brake table is a table that describes the relationship between the braking capacity of the vehicle, the longitudinal slope of the route and the permissible speed.

Brake panels can be used to read how many braking hundredths are required to drive a certain speed with a known decisive gradient on a route.

Brake boards are set up for braking types G and P / R (i.e. for slow and fast acting brakes) as well as distant signal distances of 400, 700 and 1000 m. They are based on braking tests in which rapid braking was carried out with trains of different braking hundredths, different speeds and distant signal distances. Compared to the braking tests, an additional braking distance safety of ten percent is incorporated into the brake panels. In its set of rules, Deutsche Bahn has basic brake panels, differentiated according to the type of braking (R / P and G), depending on the speed and the decisive gradient, the braking percentages that are required for rapid braking for 400, 700 and 1000 m braking distance. The basic brake panels can be used for all signal-controlled trains.

These conventional brake boards of the pre- / main signal system do not apply to trains with a braking path , whose braking distance can be formed over several train path sections : Special brake boards are set up for lane train control (LZB). A separate calculation rule was drawn up for the high-speed routes Cologne – Rhine / Main and Nuremberg – Ingolstadt (status: 2009). Trains under the guidance of ETCS Level 2 or 3 calculate the permitted braking distances themselves using ETCS braking curves on the basis of actual route and vehicle properties.

For high-speed routes with distant signal intervals of 1300 m, a brake board with a braking distance of 1300 m was determined and introduced for braking type R / P, which is used if the LZB or ETCS equipment fails.

Brake panels require the approval of the Federal Ministry of Transport in Germany .

history

In the early 1980s, braking tests were carried out on several lines to create a new brake board with which the maximum speed of freight trains should be increased in slow-acting braking type G. In order to increase the top speed from 80 to 90 km / h, among other things, shorter brake development times had to be implemented.

Individual evidence

  1. ^ A b c Alfred Braun: Setting up brake boards for routes with line train control . In: ZEVrail, Glaser's Annalen . tape 112 , no. 4 , April 1988, ISSN  1618-8330 , ZDB -ID 2072587-5 , p. 108-118 .
  2. ↑ a b c Joachim Wittmann: Determine and set up decisive inclinations, line braking boards and saw lines; Basic brake panels . Directive 457.0401A02. Ed .: Deutsche Bahn. December 13, 2009, p. 3 .
  3. ^ Alfred Braun: The LZB brake panels for freight trains . In: Railway engineer calendar . tape 4 , 1991, ISBN 3-87814-500-4 , pp. 275-282 .
  4. ↑ Schell: Braking attempts on the Black Forest Railway . In: The Federal Railroad . tape 58 , no. 2 , February 1982, ISSN  0007-5876 , pp. 174 f .