Learning subject
Marine Electrical Systems
Function 5 quick-reference — switchboards and protection, motors and starters, transformers and electronics, alternators and parallel running, batteries, instruments and safety systems.
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Fundamentals & LawsElectrical fundamentals: AC vs DC, active and reactive power, electricity flow, and Ohm, Faraday and Kirchhoff laws.
Switchboards & ProtectionMain switchboard safeties, preferential and reverse-power trips, breaker types and trip units, bus transfer and MSB maintenance.
Motors & StartersInduction motors, single phasing, megger testing, DOL/star-delta/auto-transformer/soft starters, motor safeties and temperature class.
Transformers & ElectronicsTransformer types and kVA rating, diodes including Zener, thyristors/SCRs, and the oxygen sensor.
Alternators & Parallel RunningBrushless and self-excited alternators, construction and maintenance, paralleling with synchroscope, AVR and reverse-power protection.
Batteries & SuppliesLead-acid batteries, capacity and rating, charging and trickle circuits, and shipboard 440/220 V distribution with lighting.
Instruments & Safety SystemsMegger IR testing, thermocouples, earth-fault tracing, detectors, intrinsic safety, neutral systems, ICCP and emergency generation.
High Voltage SystemsMarine High Voltage (3.3 kV, 6.6 kV, 11 kV): safety rationale, vacuum and SF6 circuit breakers, neutral earthing resistors (NER), Castell key interlocking, PTW and earthing trucks.
Instrumentation & ControlMarine process control and automation: pneumatic flapper-nozzle mechanisms, Proportional, Integral and Derivative (P+I+D) bellows, current-to-pressure (I/P) transducers, smart valve positioners, UMS rules, and bridge control loops.