Disconnecting and removing marine electrical and electronic equipment
Overview
This standard identifies the competences you need to disconnect and remove marine electrical and electronic equipment, in preparation for overhaul or refit activities, in accordance with approved procedures. This will involve disconnecting and removing equipment at component or unit level, on a variety of electrical assemblies and sub-assemblies, such as power generation and distribution equipment, communication equipment, navigational equipment, sensor systems, computer equipment, systems, and peripheral devices, rotating electrical machines and domestic equipment and lighting, alarm, detection and monitoring equipment.
Your responsibilities will require you to comply with organisational policy and procedures for the disconnection and removal of the marine electrical and electronic equipment and to report any problems with these activities that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You will be expected to work with either a high level of supervision or as a member of a team. You will take personal responsibility for your own actions and for the quality and accuracy of the work that you carry out.
Where team working is involved, you must demonstrate a significant personal contribution during the team activities in order to satisfy the requirements of the standard and competence in all the areas required by the standard must be demonstrated. You must ensure that all tools, equipment and materials used in the activities are removed from the work area on completion of the activities, and that all necessary job/task documentation is completed, accurately and legibly.
Your underpinning knowledge will be sufficient to provide a sound basis for your work and will provide an informed approach to applying disconnection and removal techniques on marine electrical and electronic equipment. You will have an understanding of the disconnection and removal methods and procedures used and their application. You will know about the electrical equipment being removed, in adequate depth to provide a sound basis for carrying out the disconnection and removal activities to the required specification.
You will understand the safety precautions required when carrying out the disconnection and removal activities, especially those for isolating the equipment. You will be required to demonstrate safe working practices throughout and will understand your responsibility for taking the necessary safeguards to protect yourself and others in the workplace.
Performance criteria
You must be able to:
- work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines
- establish and where appropriate mark component for re-assembly
- ensure that any stored energy or substances are released safely and correctly
- make all isolations and disconnections to the equipment in line with approved procedures
- carry out the disconnection and removals to the agreed level using correct tools and techniques
- store components for re-use in approved locations
- dispose of unwanted components and substances in accordance with approved procedures
- deal promptly and effectively with problems within your control and report those that cannot be solved
- complete relevant documentation, in accordance with organisational requirements
Knowledge and Understanding
You need to know and understand:
- the specific safety practices and procedures that you need to observe when disconnecting and removing marine electrical equipment and circuits (including any specific legislation, regulations/codes of practice for the activities, equipment or materials)
- the health and safety requirements of the area in which the marine electrical disconnection and removal activity is to take place and the responsibility these requirements place on you
- the isolation and lock-off procedure or permit-to-work procedure that applies to the disconnection and removal activities (to include electrical isolation, locking off switch gear, removal of fuses, placing of maintenance warning notices, proving that isolation has been achieved and secured)
- how to recognise and deal with emergencies and the procedures to be followed (such as methods of safely evacuating and closing down compartments in the case of fire or other major incident)
- the importance of wearing protective clothing and other appropriate safety equipment (PPE) during the electrical disconnection and removal activities
- the precautions to be taken to prevent electrostatic discharge (ESD) damage to circuits and sensitive components (such as use of earthed wrist straps)
- what constitutes a hazardous voltage and how to recognise victims of electric shock
- how to reduce the risks of a phase to earth shock (such as insulated tools, rubber matting and isolating transformers)
- how to obtain and interpret job instructions, drawings and specifications used in the disconnection and removal process
- the extent to which the equipment is to be dismantled for removal
- the different types of cabling used in marine electrical installations, and their method of disconnection (such as multi-core cables, single core cables, steel wire armoured (SWA), mineral insulated (MI), screened cables)
- the different types of wiring enclosures that are used (to include conduit, trunking and traywork systems) and the methods of removing them
- the techniques used to disconnect and remove electrical equipment (such as unplugging, de-soldering, removal of screwed, clamped and crimped connections)
- methods of removing and replacing cables and wires in wiring enclosures, without causing damage to existing cables
- methods of attaching identification marks/labels to removed components or cables, to assist with re-assembly
- methods of supporting and lifting the equipment being removed
- the need to ensure that lifting and handling equipment is within its current test dates
- the tools and equipment used in the disconnection activities (including the use of soldering irons and torches, gland disconnecting tools)
- 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
- the storage requirements of removed units and assemblies that are not part of the overhaul process
- the methods used to protect and prepare the removed equipment during transportation to the place of overhaul
- the generation of maintenance documentation and/or reports following the disconnection and removal activity
- the problems that can occur during the electrical disconnection and removal activity and how they can be overcome
- the extent of your own authority and whom you should report to if you have a problem that you cannot resolve
Scope/range
Scope Performance
Carry out all of the following during the disconnection and removal activities:
- undertake the disconnection and removal activities to cause minimal disruption to normal working
- use the correct issue of structure/vessel/craft system drawings and disconnection documentation
- adhere to risk assessment, COSHH and other relevant safety standards
- obtain clearance to work on the system and observe the appropriate power isolation and safety procedures
- provide safe access and working arrangements for the area
- carry out the disconnection and removal activities, using appropriate techniques and procedures
- dispose of waste items in a safe and environmentally acceptable manner and leave the work area in the prescribed category of cleanliness
Carry out disconnection and removal of electrical equipment from two of the following:
- single phase power supplies
- three phase power supplies
- direct current power supplies
Carry out disconnection and removal of components from two of the following types of marine electrical systems:
- communication equipment and systems
- weapons equipment and systems
- navigational equipment and systems
- rotating electrical machines and domestic equipment
- sensor equipment and systems
- lighting, alarm, detection and monitoring systems
- computer equipment, systems and peripheral devices
- power generation and distribution equipment and systems
- other specific marine electrical system
Carry out all of the following dismantling and removal activities:
- isolating and locking off equipment
- removing electrical units/components
- disconnecting wires and cables
- making safe all disconnected service supplies
- attaching suitable cable identification markers
- supporting equipment to be removed
- removing wiring enclosures
- removing mechanical fastening devices
- safely storing all peripheral units which are not part of the overhaul
- protecting and preparing removed components for transportation for overhaul
Dismantle and remove marine electrical equipment, in accordance with one of the following standards:
- customer (contractual) standards and requirements
- company standards and procedures
- specific equipment requirements/manufacturer's data
- recognised compliance agency/body's standards
Complete relevant paperwork to include one of the following and pass it to the appropriate people:
- job cards
- work authorisation documents
- system log
- vessel wiring documentation
- maintenance logs or reports
- other specific reporting method
Scope Knowledge
Values
Behaviours
You will be able to apply the appropriate behaviours required in the workplace to meet the job profile and overall company objectives, such as:
- strong work ethic
- positive attitude
- team player
- dependability
- responsibility
- honesty
- integrity
- motivation
- commitment