IRS 50541-05-1ed.

Annotation of standard text IRS 50541-05-1ed. :

A wheel slide protection system (WSP system) is designed to make the best use of available adhesion and improve adhesionas well as improve it in all operating conditions through a controlled reduction and restoration of the braking force to prevent wheelsets from locking and sliding in an uncontrolled manner due to low adhesion. Thus, the stopping distance on with degraded adhesion is optimiszed and the occurrence of wheelset damage is minimised.

A wheel rotation monitoring system (WRM system) is designed to detect locked wheels and provide instant notificationinstantly notify the relevant systems and possibly the driver of such occurrences.

Trains fitted with WSP / WRM systems may consist of single vehicles, and tractive and trailing vehicles or may be high- speed trains, multiple units, or commuter trains operating on any track gauge.

Such vehicles are equipped with pneumatic friction brakes and may also be equipped with additional braking systems, e.g. dynamic brakes and wheel / rail adhesion -independent brakes, and may also be fitted with adhesion enhancement systems, e.g. sanding.

Vehicles fitted and tested with WSP in accordance with the present IlRS are deemed to have adequate meansresources to cope with low wheel/ / rail adhesion.

Each WSP/WRM system manufacturer of WSP / WRM systems is responsible for taking every the necessary steps to make ensure that the workmanship and manufacturing quality of workmanship and manufacture meets the requirements of proper engineering practice.

It integrates in full or in part the following UIC leaflets:

• - UIC Leaflet 541-05: "Brakes - Manufacturing specifications for various brake parts - Wheel Slide Protection device (WSP)"

It complements the following standards:

• - none