DIN EN 15595:2011-01

The objectives of fitting wheel slide protection (WSP) systems to trains are to assist in achieving the following: 1) minimum extension in stopping distance compared to stopping on clean dry rails (that means, at good adhesion conditions); 2) minimum level of wheelset damage due to wheel slide or wheel 'lock-up'; 3) minimum level of track damage; 4) for pneumatic brake systems, minimum increase in air consumption compared to a "non WSP" stop. The particular priority of these aforementioned objectives may vary for different classes of applications or even for a particular application. Trains fitted with WSP systems may consist of single vehicles, locomotive and trailing vehicles or may be high speed trains, multiple units, commuter trains, wagons, and so on. Such trains are equipped with a friction brake and may also be equipped with dynamic brakes, magnetic track brakes and/or eddy current brakes and may also be fitted with adhesion improving systems (for example, sanding systems). This standard covers both the system-specific as well as the application-specific acceptance requirements for WSP systems.