# Commission Decision of 30 May 2002 concerning the technical specification for interoperability relating to the rolling stock subsystem of the trans-European high-speed rail system referred to in Article 6(1) of Directive 96/48/EC (notified under document number C(2002) 1952) (Text with EEA relevance) (2002/735/EC), Division 4.3.6: Brake system requirements

Extent: E+W+S+N.I.

In addition to the needs listed in Sections 4.1.5 and 4.3.5, the braking system of interoperable trainsets shall be designed in such a way that attainment of the safety objectives set by Directive 96/48/EC can be demonstrated. In particular that they do not introduce any degradation in this area, either for the rolling stock subsystem or the total rail system.
This demand is implicitly satisfied by interoperable trainsets using UIC braking systems. For other braking systems, a demonstration must establish that it is possible to achieve a level of operation at least as safe as that achieved in the prescribed standard.
Furthermore, and whatever is envisaged for construction, the brake system must meet the following requirements:
for the complete train:
use of the emergency brake, for whatever reason, shall automatically cut all traction power, without the facility to reapply traction power while the emergency brake is applied,
the emergency brake shall be capable of being applied at all times with the driver in his normal driving position,
vehicles shall be fitted with wheel-slide devices to control the sliding of wheels in the event of reduced adhesion between wheel and rail,
vehicles shall be equipped with a wheel-monitoring system to advise the driver that an axle has seized. The wheel-monitoring system shall be independent of the wheel-slide system in all its functions.
Electric braking:
it shall only be permissible to take account of the electric brake in the brake performance if its operation is independent of the presence of voltage in the catenary,
where the electrical installations (the sub-stations) permit, the return of electrical energy generated in braking is permissible, but this shall not cause the voltage to exceed the limits defined in Annex P to this TSI,
in addition, in the event that the supply to the catenary is lost, it shall not prohibit the line voltage dropping to 0 V.
In addition, interoperable trainsets shall be provided with:
indicators of brake failure,
a means of brake isolation,
a system of (brake) fault diagnostics.

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Source: https://www.legislation.gov.uk/eudn/2002/735/annex/division/4/division/4.3/division/4.3.6 (the official version)
Page: https://openlegislation.uk/eu-decision-2002-735/annex/division-4/division-4.3/division-4.3.6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.