Division 4.2.15 Eddy current brakes

This paragraph deals with the Infrastructure subsystem interfaces relating to the use of eddy current track brakes.

As specified in the infrastructure TSI, the use of this type of brake, independent of adhesion, on the lines (to be built, upgraded or connecting) of the interoperable network is permissible as follows:

• for emergency braking on all lines except some specific connecting lines listed in the infrastructure register,

• for Full or normal service braking over the major part of the network. Use of this type of brake is permissible, line-by-line, as given in the infrastructure register.

The interoperable trainsets equipped with this type of brake shall meet the following specifications:

• brakes independent of wheel rail adhesion can be used from the maximum operating speed down to 50 km/h: (Vmax ≥ V ≥ 50 km/h),

• the maximum average deceleration shall be less than 2,5 m/s² (this value, which is an interface with the longitudinal resistance of the track, shall be met with all brakes in use).

• in the worst case, that is to say with the trainsets working in multiple to their maximum permitted train length, the maximum longitudinal braking force applied to the track by a train shall not exceed:

  • 360 kN in emergency braking

  • 180 kN (provisional value) for full service braking to meet the speed limits set by the signalling system

  • 100 kN (provisional value) for braking on steep gradients or where speed limits are automatically applied.

This is with the understanding that the safe operation of this type of brake can be proven and in particular the absence of risk relating to common mode failures. It is permissible to include the contribution of brakes independent of adhesion in the braking performances defined in Section 4.1.5 of the present TSI, for operation on lines where their use is permitted for full and normal service braking.