ELEC 223
MARINE ELECTRICITY AND ELECTRICAL MAINTENANCE
Welcome aboard!
This course offers both theoretical and hands-on experience, focusing on six core outcomes as stated below. The course covers areas like the basic configuration principles of electrical equipment, maintenance and repair of electrical and electronic equipment, detection of electrical malfunction, and safety requirements for working on shipboard electrical systems.
Course Question Board: This course includes learning objective required to attain the following course outcomes:
CO1. Parallel and changeover generators according to established rules & procedures
CO2. Assemble an operational direct-on-line (DOL), forward reverse, and wye-delta motor starter control circuit in accordance with safe electrical working practices
CO3. Detect malfunction and rectify fault for a given motor starter and electrical system
CO4. Analyze the safety requirements for typical high-voltage generator and distribution system
CO5. Explain the principle of operation of various marine ancillary electrical systems
CO6. Dismantle, inspect, repair, and re-assemble electrical systems and equipment in accordance with manuals and good practice
CO7. Perform function and performance test of protective devices and their configuration in accordance with electrical safe working practices
Learning Modules: This course subdivided each of the course outcomes into learning outcomes stated below and being discussed from Week 1 to 17.
WEEK 1
LO1.1. Explain the various hazards and practices in handling shipboard electrical systems as per SOLAS and industry standards
LO1.2. Explain the various electrical components in a given diagram of a ship’s electrical distribution system using IEC standards
LO1.3. Sketch a single wire diagram for a given ship’s electrical distribution system from generation to consumer
LO1.4. Explain the functions of a typical Low Voltage and High Voltage electrical distribution system per industry standards
LO1.5. Explain the difference between ships and land-based electrical grounding, isolation and neutral systems per industry standards.
LO1.6. Explain the difference between a DC generator and AC generator (alternator) in terms of construction and operation per industry standards
LO1.7. Explain the various functions of the different parts and components of the Ship’s Main Switchboard per industry standards
WEEK 2
LO1.8. Explain the three (3) requirements and procedures in synchronizing and paralleling two generators into the bus bar of a ship’s main switchboard per industry standards
LO1.9. Manually synchronize and equally load share an incoming diesel generator to a diesel generator on the bus bar as per industry standard (individual)
LO1.10. Manually synchronize and changeover an incoming diesel generator to a Turbo generator and Shaft generator on the bus bar as per industry standard (individual)
WEEK 3
LO1.11. Explain the purpose of cascade protection (preferential tripping) use on board the ship’s electrical system in discriminating only fault circuits per industry standards
LO1.12. Replace different types of fuses following Code of Safe Working Practices for Merchant Seafarers
LO1.13. Explain the functions and operations of fault protection devices as per industry standards
LO1.14. Explain how to restore residual magnetism to an alternator’s exciter field per industry standards
WEEK 4
LO2.1. Explain the various starting methods for DC motors based on industry standards
LO2.2. Explain the construction and operations of an AC induction motor based on industry standard
LO2.3. Explain the various starting methods for AC motors based on industry standards
LO2.4. Construct an operational Motor Starting Circuits as follows:
2.4.1. DOL
2.4.2. Forward-Reverse DOL
2.4.3. Wye-Delta
2.4.4. Soft Starter or VFD
WEEK 5
CO2. Assemble an operational direct-on-line (DOL), forward reverse, and wye-delta motor starter control circuit in accordance with safe electrical working practices
WEEK 7
LO3.1. Explain the various electrical faults and their causes:
- Grounding or Earth Fault
- Open Circuit
- Short Circuit
LO3.2. Explain the steps in troubleshooting electrical circuits based on industry standards
LO3.3. Troubleshoot various non-functional motor starters circuits:
3.3.1 DOL
3.3.2 Forward-Reverse DOL
3.3.3 Wye-Delta
3.3.4 Soft Starter or VFD
WEEK 8
LO4.1. Explain the advantages and disadvantages of using high voltage in the shipping industry
LO4.2. Explain the competency requirements for personnel working on high voltage system per STCW 1978 as amended
LO4.3. Explain the functions of the various electrical components of a typical shipboard High Voltage Electrical Distribution System based on industry standards
LO4.4. Explain the hazards and mitigation associated with high voltage systems per industry standards
LO4.5. Explain how an Arc Detection Unit operates to avoid damage and protect
LO4.6 Explain the various steps in risk management for high voltage system as per IACS Guide to Risk Assessment for Ship Operations
WEEK 9
LO5.1. Explain the purpose and operation of the Ship’s Marine Growth Cathodic Protection (MGCP) system, as per the manufacturer’s manual
LO5.2. Explain the purpose and operation of the ship’s Impressed Current Cathodic Protection (ICCP) system, as per the manufacturer’s manual
LO5.3. Explain the operation and features of the ship’s Navigational, Signal and Emergency Lighting System as per SOLAS
LO5.4. Explain the operation and features of a typical ship’s fire alarm system per industry standards
LO5.5. Explain the electrical operation of ship’s refrigeration and HVAC air-conditioning system per industry standards
LO5.6. Explain the operation and hazards of the various ship’s battery systems per industry standards
LO5.7. Explain the various electrical practices for hazardous atmosphere per industry standards
WEEK 10
LO6.1. Disassemble and reassemble an AC induction motor based on the Code of Safe Working Practice (Group and Individual)
WEEK 11
LO6.2. Disassemble, clean and reassemble an Explosion-Flameproof (Exd) Lighting Fixture (Individual)
WEEK 13
CO6. Dismantle, inspect, repair, and re-assemble electrical systems and equipment in accordance with manuals and good practice
WEEK 14
LO7.1. Perform function test on the following generator protection devices as per manufacturer’s manual (Group and Individual):
- Overspeed protection relay
- Under voltage protection relay
- Reverse power protection relay
WEEK 15
LO7.2. Perform function test on interlock switches of motor-pump/compressor control systems as per manufacturer’s manual (Group and Individual)
WEEK 16
LO7.3. Perform function test on interlock and alarm level switches as per manufacturer’s manual (Group and Individual)
WEEK 17
CO7. Perform function and performance test of protective devices and their configuration in accordance with electrical safe working practices