Appendix D Specification of the pantograph gaugeF1

United Kingdom Repealed

D.1

SPECIFICATION OF THE MECHANICAL KINEMATIC PANTOGRAPH GAUGE

D.1.1

General

D.1.1.1

Space to be cleared for electrified lines

In the case of lines electrified by an overhead contact line, an additional space should be cleared:

to accommodate the OCL equipment,
to allow the free passage of the pantograph.

This Appendix deals with the free passage of the pantograph (pantograph gauge). The electrical clearance is considered by the Infrastructure Manager.

D.1.1.2

Particularities

The pantograph gauge differs in some aspects from the obstacle gauge:

The pantograph is (partly) live and, for this reason, an electrical clearance is to be complied with, according to the nature of the obstacle (insulated or not),
The presence of insulating horns should be taken into account, where necessary. Therefore a double reference contour has to be defined to take account of the mechanical and electrical interference simultaneously,
In collecting condition, the pantograph is in permanent contact with the contact wire and, for this reason, its height is variable. So is the height of the pantograph gauge.

D.1.1.3

Symbols and abbreviations

D.1.1.4

Basic principles

Figure D.1

Pantograph mechanical gauges

Caption:

Centre line of the track

Y′

Centre line of the pantograph — for deriving the free passage reference profile

Y″

Centre line of the pantograph — for deriving the mechanical kinematic pantograph gauge

Pantograph profile

Free passage reference profile

Mechanical kinematic gauge

The pantograph gauge is only met if the mechanical and electrical gauges are complied with simultaneously:

The free passage reference profile includes the pantograph collector head length and the pantograph sway e_p, which applies up to the reference cant or cant deficiency,
Live and insulated obstacles shall remain outside the mechanical gauge,
Non insulated obstacles (earthed or at a potential different from the OCL) shall remain outside the mechanical and electrical gauges.

D.1.2

Specification of the mechanical kinematic pantograph gauge

D.1.2.1

Specification of the width of the mechanical gauge

D.1.2.1.1

Scope

The width of the pantograph gauge is mainly specified by the length and displacements of the pantograph under consideration. Beyond specific phenomena, phenomena similar to those of the obstacle gauge are found in the transverse displacements.

The pantograph gauge shall be considered at the following heights:

The upper verification height h′_o
The lower verification height h′_u

Between those two heights, it can be considered that gauge width varies in a linear way.

The various parameters are shown in figure D.2.

D.1.2.1.2

Calculation methodology

The pantograph gauge width shall be specified by the sum of the parameters defined below. In the case of a line run by various pantographs, the maximum width should be considered.

For the lower verification point with h = h′_u :

{b′}_{u (i ∕ a), mec} = {(b_{w} + e_{pu} + {S′}_{i/a} + {qs′}_{i/a} + \sum_{j})}_{\max}

For the upper verification point with h = h′_o :

{b′}_{o (i ∕ a), mec} = {(b_{w} + e_{po} + {S′}_{i/a} + {qs′}_{i/a} + \sum_{j})}_{\max}

For any intermediate height h, width is specified by means of an interpolation:

{b′}_{h,mec} = {b′}_{u,mec} + \frac{h - {h′}_{u}}{{h′}_{o} - {h′}_{u}} \times ({b′}_{o,mec} - {b′}_{u,mec})

D.1.2.1.3

Half-length bw of the pantograph bow

The half-length b_w of the pantograph bow depends on the type of pantograph used. The pantograph profile(s) to be considered are defined in LOC&PAS TSI, point 4.2.8.2.9.2.

D.1.2.1.4

Pantograph sway ep

The sway mainly depends on the following phenomena:

Play q + w in the axle boxes and between bogie and body.
The amount of body inclination taken into account by the vehicle (depending on the specific flexibility s₀′, the reference cant D′₀ and the reference cant deficiency I′₀ ).
The mounting tolerance of the pantograph on the roof.
The transverse flexibility of the mounting device on the roof.
The height under consideration h′.

D.1.2.1.5

Additional overthrows

The pantograph gauge has a specific additional overthrows. In case of standard track gauge the following formula applies:

For other track gauges the national rules apply.

D.1.2.1.6

Quasi-static effect

Since the pantograph is installed on the roof, the quasi-static effect plays an important role in the calculation of the pantograph gauge. That effect is calculated from the specific flexibility s₀′, reference cant D′₀ and reference cant deficiency I′₀ :

{qs′}_{i} = \frac{{S′}_{0}}{L} {[D - {D′}_{0}]}_{>0} (h - {h′}_{c 0})

{qs′}_{a} = \frac{{S′}_{0}}{L} {[I - {I′}_{0}]}_{>0} (h - {h′}_{c 0})

D.1.2.1.7

Allowances

According to gauge definition, the following phenomena should be considered:

Loading dissymmetry;
The transverse displacement of the track between two successive maintenance actions;
The cant variation occurring between two successive maintenance actions;
Oscillations generated by track unevenness.

The sum of the abovementioned allowances is covered by Σj.

D.1.2.2

Specification of the height of the mechanical gauge

Gauge height shall be specified on the basis of the static height h_cc , of the contact wire at the local point under consideration. The following parameters should be considered:

The raising f_s of the contact wire generated by the pantograph contact force. The value of f_s depends on the OCL type and so shall be specified by the Infrastructure Manager in accordance with point 4.2.12.
The raising of the pantograph head due to the pantograph head skew generated by the staggered contact point and the wear of the collector strip f_ws + f_wa . The permissible value of f_ws is shown in LOC & PAS TSI and f_wa depends on maintenance requirements.

The height of the mechanical gauge is given by the following formula:

h_{eff} = h_{cc} + f_{s} + f_{ws} + f_{wa}

D.1.3

Reference parameters

Parameters for the kinematic mechanical pantograph gauge and for Specification of the maximum lateral deviation of the contact wire shall be as follows:

l — according to track gauge
s′_o = 0,225
h′_co = 0,5 m
I′₀ = 0,066 m and D′₀ = 0,066 m
h′_o = 6,500 m and h′_u = 5,000 m

D.1.4

Calculation of maximum lateral deviation of contact wire

The maximum lateral deviation of the contact wire shall be calculated by taking into consideration the total movement of the pantograph with respect to the nominal track position and the conducting range (or working length, for pantographs without horns made from a conducting material) as follows:

$d_{l} = b_{w,c} + b_{w} - {b′}_{h,mec}$

b_w,c — defined in points 4.2.8.2.9.1 and 4.2.8.2.9.2 of LOC&PAS TSI

D.2

SPECIFICATION OF THE STATIC PANTOGRAPH GAUGE (TRACK GAUGE SYSTEM 1 520 mm)

This is applicable for Member States accepting the pantograph profile in accordance with LOC&PAS TSI point 4.2.8.2.9.2.3.

The pantograph gauge shall conform to Figure D.3 and Table D.1.

Annotations

Textual amendments

F1: Regulation revoked (31.12.2020) by The Railways (Interoperability) (Miscellaneous Amendments and Revocations) (EU Exit) Regulations 2020 (S.I. 2020/318), reg. 1(2)(c), Sch. 2