Overhauling and repairing marine electrical rotating machines and domestic equipment

This standard identifies the competences you need to carry out overhauling activities on marine electrical rotating machines and domestic equipment, in accordance with approved procedures. The equipment to be overhauled will include motors, starters and their local and remote control equipment, pumps, compressors, fans, winches and hoists, in addition to electrical components of domestic/hotel services and auxiliary equipment such as refrigerators, dishwashers, galley and food preparation, water heater and laundry equipment.

This will involve dismantling, removing and replacing faulty equipment, at component or unit level, on different types of electrical assemblies and sub-assemblies. You will be expected to apply a range of dismantling and reassembly methods and techniques, such as removing and replacing mechanical fasteners, removing and replacing damaged, faulty, worn or out-of-date components, soldering/de-soldering, crimping, harnessing and securing cables and components.   

Your responsibilities will require you to comply with organisational policy and procedures for the overhaul of the marine rotating electrical machines and equipment and to report any problems with the overhauling activities that you cannot personally resolve, or are outside your permitted authority, to the relevant people. You must ensure that all tools, equipment and materials used in the overhaul are removed from the work area on completion of the activities and that all necessary job/task documentation is completed accurately and legibly. You will be expected to work with a minimum of supervision, taking personal responsibility for your 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 overhauling procedures to marine electrical rotating and domestic equipment. You will understand the dismantling/re-assembly methods and procedures used and their application.  You will know about the equipment being worked on, component properties, functions and associated defects, in adequate depth to provide a sound basis for carrying out the overhauling activities, correcting faults and ensuring that the overhauled equipment functions to the required specification.

You will understand the safety precautions required when carrying out the overhauling 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.

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1. work safely at all times, complying with health and safety and other relevant regulations, directives and guidelines

2. follow the relevant overhauling schedules to carry out the required work

3. carry out the overhauling activities within the limits of your personal authority

4. carry out the overhauling activities in the specified sequence and in the prescribed time scale
5. report any instances where the overhauling activities cannot be fully met or where there are identified defects outside the planned schedule
6. complete relevant documentation in line with organisational procedures and pass them on to the appropriate person
7. dispose of waste materials in accordance with safe working practices and approved procedures

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1. the health and safety requirements of the area in which the overhauling activity is to take place, and the responsibility they place on you
2. the isolation and lock-off procedure or permit-to-work procedure that applies to the overhauling activities (to include electrical isolation, locking off switchgear, removal of fuses, placing maintenance warning notices, proving that isolation has been achieved and secured)
3. the specific health and safety precautions to be applied during the overhaul and their effects on others
4. how to recognise and deal with emergencies and the procedures to be followed (such as methods of safely evacuating and closing down of compartments in the case of fire or other major incident, first aid, fire fighting and resuscitation of personnel)
5. the importance of wearing protective clothing and other appropriate safety equipment (PPE) during the overhaul

6. hazards associated with carrying out overhauling activities on marine electrical rotating machines and domestic equipment (such as exposure to live conductors, misuse of tools) and how they can be minimised

7. the precautions to be taken to prevent electrostatic discharge (ESD) damage to circuits and sensitive components (such as use of earthed wrist straps)

8. what constitutes a hazardous voltage and how to recognise victims of electric shock

9. how to reduce the risks of a phase to earth shock (such as insulated tools, rubber matting and isolating transformers)

10. the interpretation of drawings, standards, quality control procedures and specification used for the overhaul
11. how to carry out currency/issue status of the specification to which you are working
12. the quality control procedures called for in the overhauling process
13. the items, circuits and components to be overhauled and their function within the particular marine rotating electrical equipment or domestic system
14. the various fixings, fasteners and termination devices, their method of deployment and the importance of these within the system
15. the application and use of a range of electrical components (such as module blocks, terminal blocks, multi-pin plugs/sockets, tray-mounted sockets, earth bonding points) and the likely functions that will require checking

16. the different types of wiring enclosures that are used (to include conduit, trunking, traywork systems and bulkhead penetrations) and what to check during the overhauling activities

17. methods of checking that components are fit for purpose and the need to replace 'lifed' items (such as motor brushes, seals and gaskets, overload protection devices, filters)

18. the care, handling and application of ohmmeters, multimeters and other electrical measuring instruments
19. how to recognise defects in marine rotating electrical machines and domestic equipment (such as under or over performance)
20. the adjustments/corrections/tuning required to bring the equipment/system up to operational standard through full range parameters
21. the factors to take into account when deciding if a component/module can be repaired or not
22. the different types and methods of repair that can be undertaken
23. company policy on the repair/replacement of components and the procedure for obtaining replacement parts, materials and other consumables necessary for the overhauling process
24. how to check that the replacement components meet the required specification/operating conditions (such as values, tolerance, current carrying capacity, voltage rating, power rating, ambient temperatures)
25. methods of removing and replacing cables/wires in wiring enclosures without causing damage to existing cables or components
26. why unit electrical bonding, earth prevention and continuity are critical, and why earth bonding must be both mechanically and electrically secure
27. the appropriate testing procedures to be adopted during the overhauling activity
28. the importance of making 'off-load' checks before proving the equipment with the electrical supply on
29. the importance of ensuring that the equipment is overhauled to the prescribed category of cleanliness
30. how to compile overhauling records/logs/reports which satisfy company policy and procedures
31. the problems that can occur whilst carrying out the overhauling activities, and how they can be avoided
32. the organisational procedure to be adopted for the safe disposal of waste of all types of materials
33. the extent of your own authority and whom you should report to if you have problems that you cannot resolve

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1.    Carry out all of the following during the overhaul of the marine rotating electrical machines and domestic equipment:

1. plan the overhauling activities to cause minimal disruption to normal working
2. use the correct issue of equipment/system drawings and overhauling documentation
3. adhere to risk assessment, COSHH and other relevant safety standards
4. obtain clearance to work on the equipment and observe the appropriate power isolation and safety procedures
5. provide safe access and working arrangements for the overhauling area
6. carry out the overhauling activities, using appropriate techniques and procedures
7. re-connect and return the system for setting to work on completion of the overhaul
8. leave the work area in the prescribed category of cleanliness
   
    

2.    Carry out overhauling activities on the following marine rotating electrical and domestic equipment:-

either: four of the following rotating electrical machines:

1. single phase alternating current motors
2. three-phase alternating current motors
3. direct current motors
4. pumps
5. compressors
6. fans
7. winches/hoists
   
   or:  four of the following types of domestic electrical equipment:
8. cooking ranges
9. washing machines
10. dryers
11. water heaters
12. fryers
13. ovens
14. sanitary units
15. other specific domestic equipment
    
      

3.    Carry out all of the following overhauling activities, as applicable to the equipment being overhauled:

1. isolating and locking off equipment
2. dismantling equipment to unit level
3. removing electrical units/components
4. disconnecting and re-connecting wires/cables
5. removing and replacing damaged wires/cables
6. visually checking components for serviceability
7. dimensional inspection of components
8. measurement of electrical values of components
9. replacing damaged/defective units/components
10. repair defective/damaged units/components
11. adjustment of variables to return to tolerance
12. replacing 'lifed' or updated items or components
13. removing and replacing wiring enclosures
14. attaching suitable cable identification markers
15. harnessing and securing wires and cables
16. securing, screening and locking
17. earth bonding
18. setting and adjusting replaced components
19. making 'off-load' checks before powering up
20. functionally testing the completed system
    
     

4.    Replace a range of components, to include eight of the following groups of components:

1. cables and connectors
2. contactors
3. relay components
4. overload protection devices
5. bearings
6. belts
7. electronic modules
8. capacitors
9. rectifiers
10. inverter and servo controllers
11. circuit boards
12. thermistors or thermocouples
13. brush gear
14. switches
15. indicator lamps
16. batteries
17. sensors
18. solenoids
19. transformers
20. locking and retaining devices (such as cable ties, clips, fasteners)
    
21. other specific components
    
     

5.    Make three of the following types of mechanical securing connections to the equipment:

1. threaded fasteners
2. locking devices
3. screws
4. quick release fasteners
5. torque loaded bolts
   
    

6.    Make three of the following types of electrical connection to the equipment:

1. module blocks
2. terminal blocks
3. tray-mounted sockets  
4. free plugs
5. crimping
6. soldering           
7. fibre-optic connections
   
    

7.    Carry out five of the following checks on the overhauled system:

1. earth bonding checks
2. insulation checks
3. continuity checks
4. resistance checks
5. frequency checks
6. phase balance checks
7. functional checks of safety devises
8. over voltage and under voltage checks
9. rotational checks
10. current drawing checks           
11. alignment checks
12. clearance checks
13. flow rate checks
14. liquid level checks
15. other specific check
    
     

8.    Ensure that the overhauled electrical rotating machines and domestic equipment meets all of the following:

1. all components and sub-assemblies are fit for purpose
2. all connections are safe and sound
3. equipment static checks, after overhaul, meet specifications
4. all potential defects are identified, recorded and reported for future action

 

9.    Overhaul marine engineering rotating electrical and domestic equipment, in compliance with one of the following standards:

1. BS or ISO standards and procedures
2. customer (contractual) standards and requirements
3. company standards and procedures
4. specific equipment requirements/manufacturer's data
5. Institute of Electrical Technicians (IET) regulations
6. recognised compliance agency/body's standards
7. other accepted international standards
   
     

10.  Complete the relevant documentation in line with organisational procedures, to include one from the following and pass it to the appropriate people:

1. job cards
2. system log
3. maintenance/overhaul logs or reports
4. work authorisation documents
5. other specific reporting method
   

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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

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3

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28 Feb 2021

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Current

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Original

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Semta

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SEMME3038

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Marine Engineering Trades

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5235

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engineering; marine; overhaul; electrical; rotating machines; domestic; equipment; motors; control; galley equipment

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