Replace traction and rolling stock communication-electronic systems
Overview
This standard identifies the competencies you need to replace traction and rolling stock communication-electronic systems, in accordance with approved procedures as a result of maintenance or fault finding. You will be required to use appropriate documents, publications, orders and specifications to replace the various systems, sub-systems or assemblies. You will be expected to disconnect, remove, position, align and connect communication-electronic systems, subsystems or assemblies in their correct locations, using the specified or appropriate techniques. The term traction and rolling stock used in this standard applies to passenger, freight and on-track machines (OTM). Where it is relevant these standards also apply to traction and rolling stock that has been fitted with the European Train Control System (ETCS).
Your responsibilities will require you to comply with organisational policy and procedures for the replacement activities undertaken and to report any problems with the activities, components or equipment that you cannot personally resolve, or that are outside your permitted authority, to the relevant people. You will be expected to work with minimal supervision, taking personal responsibility for your own actions, and for the quality and accuracy of the work that you carry out.
Your underpinning knowledge will provide a good understanding of your work and will provide an informed approach to applying replacement techniques and procedures. You will understand the traction and rolling stock communication-electronic systems being replaced, and their application, and will know about the removal and installation techniques, tools and methods, in adequate depth to provide a sound basis for carrying out the activities to the required specification.
You will understand the safety precautions required when carrying out replacement activities, especially those for ensuring safe isolation of the equipment and for taking the necessary safeguards to protect yourself and others. You will be required to demonstrate safe working practices throughout and will understand the responsibility you owe to yourself and others in the workplace.
Performance criteria
You must be able to:
P1 maintain safe working practices and comply with all relevant health and safety regulations, directives, and guidelines
P2 follow all relevant drawings and specifications for the replacement being carried out
P3 use the correct tools and equipment for the replacement operations and check that they are in a safe and usable condition
P4 replace, position and secure the equipment and components in accordance with the specification
P5 ensure that all necessary connections to the equipment are complete
P6 address problems within your control and report unresolved issues
P7 check that the installation is complete and that all components are free from damage
P8 complete relevant system maintenance records and pass them on to the appropriate person
Knowledge and Understanding
You need to know and understand:
K1 the relevant health and safety regulations, directives, guidelines, and safe working practices and procedures defined by your organisation, as appropriate to the activity and your working area
K2 the specific safety practices and procedures that you need to observe when replacing communication-electronic systems (including any specific legislation, regulations/codes of practice for the activities, equipment or materials)
K3 the isolation and lock-off procedure or permit-to-work procedure that applies to the system (such as electrical isolation, locking off switchgear, placing of maintenance warning notices, proving the isolation has been achieved and secured)
K4 the health and safety requirements of the work area where you are carrying out the activities, and the responsibility these requirements place on you
K5 the hazards associated with replacing communication-electronic systems, and how to minimise them and reduce any risks
K6 the classification of different voltage levels and the authority requirements for working on them
K7 what constitutes a hazardous voltage/current and how to recognise victims of electric shock
K8 how to reduce the risks of an electric shock (such as insulated tools, rubber matting and isolating transformers)
K9 the personal protective equipment (PPE) that you need to use during the activities
K10 the procedures and precautions to be adopted to eliminate electrostatic discharge (ESD) hazards
K11 the interpretation of drawings, standards, quality control procedures and specifications used for removal and installation
K12 the components, communication-electronic systems, subsystems and assemblies to be replaced, and their function within the particular communication-electronic systems
K13 the various mechanical fasteners and locking devices that will be used, and their method of installation
K14 the importance of using the specified fasteners for the particular installation, and why you must not substitute others
K15 what the torque loading requirements are on the fasteners, and what to do if these loadings are exceeded or not achieved
K16 the quality control procedures to be followed during the replacement operations
K17 procedures for ensuring that you have the correct tools, equipment, components and fasteners for the activities
K18 the techniques used to remove, position, align, adjust and secure the components of the communication-electronic systems without damage
K19 methods of lifting, handling and supporting the components/equipment during the replacement activities
K20 why electrical bonding is critical, and why it must be both mechanically and electrically secure
K21 the procedure for the storage/transport/disposal of the removed components
K22 the importance of recording the serial numbers of removed and newly fitted components affecting the rolling stock asset tree
K23 the procedure for the safe disposal of waste materials
K24 how to conduct any necessary checks to ensure the system integrity, functionality, accuracy and quality of the installation
K25 the procedure for the removal/transfer and configuration of data from the system components prior to testing
K26 the tools and equipment used in the activities, and their calibration/care and control procedures
K27 why tool/equipment control is critical, and what to do if a tool or piece of equipment is unaccounted for on completion of the activities
K28 the problems that can occur with the replacement operations, and how these can be overcome
K29 the recording documentation to be completed for the replacement activities undertaken
K30 the extent of your own responsibility and to whom you should report if you have problems that you cannot resolve
Scope/range
Scope Performance
During replacement activities, individuals will:
- obtain and use the correct issue of company publications and planning documentation as well as the correct version of any maintenance software tools required
- adhere to procedures or systems in place for risk assessment, control of substances, personal protective equipment and other relevant safety regulations and procedures to realise a safe system of work
- check the calibration dates of tools and test equipment to be used
- use approved removal/installation techniques and procedures at all times
- provide and maintain safe access and working arrangements to the work area
- dispose of waste items to comply with environmental protection guidelines and ensure the work area remains safe
Types of communication-electronic subsystems or assemblies could include:
- electronic
- transmitters
- transceivers
- receivers
- aerial systems
- radar systems
- staff communication systems (such as GSMR, PA, cab to cab)
- train control systems (such as AWS, ATP, TPWS, ETCS)
- data transmission lines (such as fibre optics, coaxial, baluns, twin wire)
- display systems (such as crew and passenger information)
- driver-machine interface
- optical systems (such as CCTV)
- built-in test equipment
- data network systems (such as LANs, WANs)
- data network interfaces (such as switches, router, bridging networks)
- any other identifiable electronic system, subsystem or assemblies to
- Line Replaceable Unit (LRU) level
- environmental control systems (such as temperature, alarms, fire protection, fire suppression)
- electromechanical systems (such as servos, motors, relays, complex switches)
- power generation systems (such as AC/DC generators, batteries)
- power distribution systems (such as single phase/3-phase distribution panels, shore connections)
- traction supply control systems (such as inverters, rectifiers, regenerative braking)
- monitoring systems (such as On Train Data Recorder (OTDR))
- hybrid systems (such as ADC, DAC)
Methods and techniques used during replacement activities could include:
- taking ESD precautions
- disconnection
- levelling and aligning
- earth bonding
- securing and locking
Types of mechanical securing connections to be disconnected/connected could include:
- threaded fasteners
- locking devices
- screws
- torque load bolts
- quick-release fasteners
- other specific securing device
Types of electrical or electronic connections to be disconnected/connected could include:
- co-axial
- screened
- data cable
- earth bonding points
- PCB header connectors
- quad-shield connectors
- multi pin connectors (such as 62GB)
- D-type connectors
- free plugs and sockets
- fibre-optic connectors
- other specific electronic/electrical connection
Replacement activities may need to be completed in accordance with the following:
- organisational guidelines and codes of practice
- equipment manufacturer's documents
- BS, ISO and/or BS EN standards
- company standard operating procedures (SOP's)
- documents such as technical procedures, vehicle maintenance instructions, vehicle overhaul instructions, workshop overhaul standards specifications
Types of paperwork/records that need to be completed and passed to the appropriate people could include:
- job cards
- specific deployment/installation report
- build records
- maintenance log/report
- company-specific documentation
- electronic records