Safety Related Colours for Signalling Application

Transcription

1 Railway Group Standard Safety Related Colours for Signalling Application Synopsis This document defines the colours of signalling equipment in cases where such colours have safety implications, but the colour to be used is not defined in any other standard. Signatures removed from electronic version Submitted by Elizabeth Fleming Standards Project Manager Authorised by Brian Alston Acting Controller, Railway Group Standards This document is the property of Railtrack PLC. It shall not be reproduced in whole or in part without the written permission of the Controller, Railway Group Standards, Railtrack PLC. Published by: Safety & Standards Directorate Railtrack PLC Floor DP01, Railtrack House Euston Square London NW1 2EE Copyright 1999 Railtrack PLC

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3 Railway Group Standard Page 1 of 10 Contents Section Description Page Part A Issue Record 2 Responsibilities 2 Compliance 2 Health and Safety Responsibilities 2 Supply 2 Part B 1 Purpose 3 2 Scope 3 3 General Requirements 3 4 Visual Display Units (VDUs) 4 5 Control Panels 5 6 Lever Frames and Ground Frames 7 7 Signs 9 References 10 RAILTRACK 1

4 Railway Group Standard Page 2 of 10 Withdrawn Document Issue Record Part A This document will be updated when necessary by distribution of a complete replacement. Amended or additional parts of revised pages will be marked by a vertical black line in the adjacent margin. Issue Date Comments One March 1996 Original Document Two October 1999 Supersedes Issue 1 Responsibilities Railway Group Standards are mandatory on all members of the Railway Group * and apply to all relevant activities that fall into the scope of each individual s Railway Safety Case. If any of those activities are performed by a contractor, the contractor s obligation in respect of Railway Group Standards is determined by the terms of the contract between the respective parties. Where a contractor is a duty holder of a Railway Safety Case then Railway Group Standards apply directly to the activities described in the Safety Case. * The Railway Group comprises Railtrack and the duty holders of the Railway Safety Cases accepted by Railtrack Compliance The provisions of this document are to be complied with for schemes for which the Signalling Scheme Plan is first approved on or after 4 December Retrospective action is not required in respect of existing schemes for which the Signalling Scheme Plan was approved prior to 4 December Railtrack shall consider the need to comply with this issue of the Standard when any alterations are made to a Signalling Scheme Plan which had first been approved prior to 4 December Where any alteration is made to an existing installation, including routine maintenance repainting, the entire installation shall be brought into conformance with these requirements unless a cost benefit analysis shows that the cost is grossly disproportionate to the benefit. No other retrospective action is required. Health and Safety Responsibilities In issuing this document, Railtrack PLC makes no warranties, express or implied, that compliance with all or any documents published by the Safety & Standards Directorate is sufficient on its own to ensure safe systems of work or operation. Each user is reminded of its own responsibilities to ensure health and safety at work and its individual duties under health and safety legislation. Supply Controlled and uncontrolled copies of this document may be obtained from the Industry Safety Liaison Dept, Safety and Standards Directorate, Railtrack PLC, Railtrack House, DP01, Euston Square, London, NW1 2EE. 2 RAILTRACK

5 Railway Group Standard Page 3 of 10 1 Purpose 2 Scope Part B The purpose of this document is to define the colours to be used in those parts of the signalling system where colour has safety implications, but the colour to be used is not defined in any other Standard. The overall scope of Railway Group Standards is as specified in Appendix A of GA/RT6001. The contents of this document applies to specific signalling applications where colour is used to convey safety related signalling information, in particular: Visual Display Units Control Panels Lever Frames Printed Colours Signs The requirements for signals and for signs used as signals are incorporated in Railway Group Standard GK/RT0031, Lineside Signals and Indicators. 3 General Requirements Wherever a colour is used in a particular installation, that colour shall be used consistently throughout that installation. Where no colour is defined for a particular function, any appropriate colour may be used, provided that the colour is used consistently throughout that installation. Any colour identified in this standard shall generally be confined to the designated safety related purpose and shall only be used for other purposes where no confusion would arise. Where printed or painted colours are used, those colours should have minimal susceptibility to, and should be maintained to prevent, fading. RAILTRACK 3

6 Railway Group Standard Page 4 of 10 Withdrawn Document 4 Visual Display Units (VDUs) The following table shows the colours which shall be used to represent common indications on Visual Display Unit (VDU) based systems, for signalling control and indication purposes. Colour White Red Yellow Green Grey Pink Cyan Blue/Red Blue Black Table 1 Use Route set Ground frame indications Position light signal Off Block control Normal Slot On and Off Other miscellaneous indications Track occupation Signal red aspect Limit of shunt lit Signal replacement facility Block control Train on Line One Train Working without train staff Line Occupied Level crossing: Road signal light indications Mains power supply failure Level crossing failed Patrolman s Lockout System in Use Warnings requiring attention / Emergency alarm Signal yellow aspect Warning class exit Point, ground frame and ARS sub area reminders Signal green aspect Block control Line Clear One Train Working without train staff Line Clear Slot controls Track (not occupied and route not set) Reminder: Line blocked to electric trains Reminder: Engineering Protection or Possession SPAD Indicator Automatic working facility for Controlled Signal Background colour Note that isolated text may appear in any appropriate colour that is legible against the background colour. Where a VDU is used to control a relay based interlocking which is incapable of providing the indications shown in this table, the colours used for the available indications shall match those listed in Table 2. Colours to be used on VDUs shall be such that a different valid colour is not displayed upon failure of any component part of the display system (eg. electron gun), or the design must ensure that any credible failure is apparent to the signalman. Procedures shall be in place to prevent adjustment of colours on VDU screens except by trained personnel following a laid down procedure which ensures consistency of colour reproduction across all VDUs. The above listed colours may be used for other purposes only where there is no possibility of confusion. 4 RAILTRACK

7 Railway Group Standard Page 5 of 10 5 Control Panels 5.1 Illuminated Indications The following table shows the colours which shall be used on Control Panels to represent the common indications shown. Colour White * Red Yellow Green Table 2 Use Entrance and exit button indications Route set Position light signal Off Block control Normal Slot On and Off Point detection Directional indicator Other miscellaneous indications Track occupation Main signal On Position light signal with red aspect On Limit of shunt lit Block control Train on Line One Train Working without train staff Line Occupied Road signal light indications Mains power supply failure Level crossing failed Patrolman s Lockout System in Use Warnings requiring attention / Emergency alarm Limits of control Main signal (not capable of showing red aspect) On Position light signal with yellow aspect On Main signal Off Block control Line Clear One Train Working without train staff Line Clear * Where LEDs are used for indications, yellow LEDs may be used in place of white provided no confusion can arise with any genuine yellow indications. The above listed colours may be used for other purposes where there is no possibility of confusion. RAILTRACK 5

8 Railway Group Standard Page 6 of 10 Withdrawn Document 5.2 Control Panels and Indication Diagrams The following table shows the colours which shall be used on Control Panels and Indication Diagrams, to represent those features listed. Colour BS381C Use Shade Reference Number Black Non track circuited lines (full line) Track circuited line not indicated (outline) Point switch* Level crossing buttons/switches* (except Stop buttons) Block bell push buttons* Override Switches* Tunnels, Viaducts and Bridges White Normal block control button* Red 537 Push button surrounds (main signals) Level crossing stop buttons* Train on line block control buttons* Emergency replacement buttons* (Aspect proved) Button collars Yellow 356 Warning route exit push buttons* Shunt route exit push buttons* Push button surrounds (for position lights) Track circuited line section # Green 220 Line clear block control button* Track circuited line section # Brown 414 Ground frame/panel release switches Track circuited line section # Blue 166 Alternative route buttons* Automatic working buttons* Track circuited line section # SPAD Indicator Emergency Replacement Buttons* (Aspect not proved) Button collars (blocked to electric traction) Orange 557 Platforms and Level Crossings May be used for track circuited line sections as an alternative to brown # Table 3 * According to the applications or the technology used, the button/switch or the button surround/escutcheon may be coloured. # The colours shown shall be used whenever track circuit sections require to be defined by the use of different colours. Where this is the case, green and brown (or orange) shall be used for one line (usually down direction) and blue and yellow shall be used for the adjacent line (usually up line), repeating as necessary for additional lines. One additional non conflicting colour (Light Violet, BS 381C shade 797 is recommended) may be used only in exceptional circumstances during alterations where the use of an additional colour would reduce the number of required consequential alterations. The background colour of a control panel or indication diagram shall be a neutral colour such that the prescribed colours shall be clearly contrasting with the background. Barrier level crossing pedestals (or equivalent) shall have black controls, except for those controls providing a stop function which shall be coloured red. 6 RAILTRACK

9 Railway Group Standard Page 7 of 10 6 Lever Frames and Ground Frames 6.1 Signalbox and Ground Frame Levers The following table shows the colour requirement for levers. Colour(s) BS381C Lever Function(s) Shade Reference Number Yellow 356 Distant signal Lever Collars (for electrical isolations) Red 537 Stop signal (main or miniature) Ground signal Route lever (controlling route indicator) Lever collars Blue 166 Facing point locks Clearance bar Black - Points Scotches Derailers Quadrants, catch blocks and boxes Blue (top) Black (bottom) Brown 411 Barriers Wicket gates Gate stops or locks Bridge locks Turntable locks Green 221 Gongs Asking lever Combined points/facing point lock (including Power points and economic points) White - Spare lever Fixed Lever (Apparatus removed from lineside) Blue (top) Brown (bottom) (NOTE 1) Red (top) Brown (bottom) Release lever Switch lever Annetts key lever Bolt locking lever Direction lever Acceptance lever Alternate brown and white stripes 411 King lever Alt. black & white chevrons # Red (top) Alternate black/white chevrons (bottom) # Red (top) Yellow (bottom) Detonators [# Chevrons point up for up line or down for down line; on single lines, chevrons point in both directions] Signals working with detonator placers [# Chevrons point up for up line or down for down line; on single lines, chevrons point in both directions] Combined home with distant signal control RAILTRACK 7

10 Railway Group Standard Page 8 of 10 Withdrawn Document Colour(s) White (top) Colour of original function (bottom) (NOTE 1) Additional horizontal white band BS381C Shade Reference Number - As per original function Lever Function(s) Levers worked to maintain locking. In addition, the lever top shall be shortened and the requirement to pull the lever to maintain locking (or for interlocking purposes only) shall be indicated to the signaller. - Any lever released from another signalbox NOTE 1: Where specified by Railtrack (for consistency within a limited geographical area), alternative colour schemes may be used. Table 4 Where two or more functions are controlled by the same lever, the top colour of that lever shall be the colour of the equipment or function that operates first. Where block shelf indications are provided with the lever frame, these shall comply (where relevant) with the requirements of Sections 5.1 and 5.2. The normal colour for the whole of a signalbox frame below floor level shall be grey (BS381C colour reference 632). Where signalbox diagrams are provided with the lever frame, these shall comply with the requirements of Section Block Instruments Block instruments shall conform to the following colour requirements: Colour White Black Red Green Instrument Non-peggers Commutators Control Plates and Indicators for Normal Peggers Control Plates & Indicators for Train On Line or Train Coming From. Control Plates & Indicators for Line Clear or Train Going To Table 5 As an alternative, the cases of block instruments may be unpainted varnished wood. 8 RAILTRACK

11 Railway Group Standard Page 9 of 10 7 Signs Signs conveying information related to safety shall use contrasting colours from BS.5378 according to their meaning/purpose. Safety colour Shade [BS381C] [BS4800 when retro reflective] Meaning/purpose Contrasting colour (if required) Symbol colour Red [BS381C 537] [BS E53] Yellow [BS381C 355] [BS E51] Blue [BS381C 109] Green [BS381C 228] [BS E53] Grey [BS381C 693] Stop; Limitation (Prohibition or Restriction) White Black Caution, risk of danger Black Black Mandatory action White White Safe condition White White Rear of sign (not applicable when viewed from this direction). Black Black Table 6 RAILTRACK 9

12 Railway Group Standard Page 10 of 10 Withdrawn Document References GA/RT6001 GK/RT0031 BS381C BS4800 BS5378 Railway Group Standards Change Procedures Lineside Signals and Indicators British Standard Specification for Colours for Identification, Coding and Special Purposes British Standard Schedule for Paint Colours for Building Purposes Safety Signs and Colours 10 RAILTRACK