Marine safety service
Electrical & Automation Services
Marine electricians and automation engineers for fault finding, emergency power tests, insulation checks, alarm and control system repairs at the vessel’s port.
Overview
Marine electrical and automation services
Marine electrical and automation services cover the fault finding, testing, repair and modification of a ship’s power generation, distribution and control systems. On a modern vessel almost every safety-critical function depends on electricity and software: steering gear, fire pumps, emergency lighting, the engine-room alarm and monitoring system, fire detection, ballast and cargo controls, and the power management system that keeps generators sharing load. A single failed relay, earth fault or corrupted controller can stop cargo work, trigger a blackout or lead to a port state detention.
vslSafety arranges shore-based marine electricians, electro-technical officers, automation engineers and maker-authorised service engineers to attend the vessel during a port call, at anchorage or as a riding team.
Regulatory requirements and standards
The core statutory framework is SOLAS chapter II-1. Part D (regulations 40 to 45) sets out requirements for the main and emergency sources of electrical power and precautions against shock, fire and other electrical hazards. Regulations 42 and 43 cover the emergency source of electrical power in passenger and cargo ships respectively, including provision for periodic testing of the complete emergency system and its automatic starting arrangements. Part E (regulations 46 to 53) applies additional requirements to periodically unattended machinery spaces, including alarm systems, fire detection and automatic controls.
Class rules, generally based on the IEC 60092 series for ship electrical installations, govern design, installation and repairs. Class surveyors examine electrical installations at annual and renewal surveys, and modifications to main or emergency switchboards, generators or essential control systems usually need class approval. For ships contracted for construction on or after 1 July 2024, IACS Unified Requirements E26 (cyber resilience of ships) and E27 (cyber resilience of on-board systems and equipment) also apply, which affects how software updates and remote access are managed on automation systems.
The Tokyo MoU has highlighted that emergency generators which pass a simulated blackout using a test switch or sequence test sometimes fail to start, supply transitional power or connect to the emergency switchboard during a real blackout. It recommends companies include periodic controlled blackout tests in their safety management system procedures. Work on high-voltage systems should only be carried out by personnel holding appropriate high-voltage competence under a permit-to-work and lock-out/tag-out regime.
Inspection and testing intervals
| Item | Requirement | Interval | Reference |
|---|---|---|---|
| Emergency source of power | Periodic testing of the complete emergency system, including automatic starting | As set in the SMS, commonly weekly start and periodic on-load test | SOLAS II-1/42 and 43; company SMS |
| Electrical installations | Examination by class surveyor, insulation resistance records reviewed | Annual and renewal surveys | Class rules |
| Unattended machinery space alarms | Function test of alarms, safety shutdowns and fire detection | At class surveys and per planned maintenance | SOLAS II-1 Part E; class rules |
| Critical equipment and stand-by systems | Regular testing of stand-by arrangements and systems not in continuous use | Defined by the company | ISM Code section 10 |
| Batteries (emergency, GMDSS, UPS) | Capacity, electrolyte or condition checks and charger function | Per maker and planned maintenance system | Maker instructions; class rules |
What the service includes
- Fault finding on generators, switchboards, motors, starters, cabling and control circuits, including earth fault tracing
- Insulation resistance testing of motors, generators and distribution circuits with recorded results
- Controlled blackout and emergency generator tests, including automatic start and changeover to the emergency switchboard
- Power management system, governor and AVR adjustment, load-sharing and synchronising checks
- Repair or replacement of circuit breakers, protection relays, contactors, transformers and shore connection panels
- Alarm and monitoring system repairs, sensor and transmitter replacement, and channel-by-channel function tests
- PLC, programmable controller and software troubleshooting, backups and maker-authorised updates
- Support for class surveys, PSC deficiency rectification and pre-vetting electrical checks
Systems and equipment covered
Attending engineers typically work on low-voltage and high-voltage main switchboards, emergency switchboards, diesel generator sets and shaft generators, steering gear motors and controls, electric motors and variable frequency drives, cargo pump and crane electrical systems, and battery and UPS installations. On the automation side, common systems include engine-room alarm and monitoring systems, power management systems, boiler and purifier controls, tank level gauging and valve remote control. Makers include Kongsberg, ABB, Siemens, Wärtsilä, Schneider Electric, Terasaki and Nabtesco.
Common defects and PSC deficiencies
- Emergency generator failing to start automatically or not connecting to the emergency switchboard in a real blackout
- Low insulation readings or persistent earth faults left unresolved in the alarm log
- Inoperative alarms, bypassed shutdowns or sensors disconnected without a documented override
- Emergency lighting and transitional power supplies that do not operate for the required duration
- Damaged cable glands, missing covers, temporary wiring and exposed live parts in switchboards and junction boxes
Certificates and documents you receive
Depending on scope, the attendance should produce a service report describing the fault, root cause and rectification, insulation resistance test sheets, emergency generator and blackout test records, calibration certificates for test instruments, and a list of parts replaced. Where class is involved, the report supports the surveyor’s own records.
How to prepare the vessel
Send the alarm log extract, electrical drawings and single-line diagrams, and any maker error codes before arrival so the engineer brings the right spares and software tools. Plan blackout and emergency generator tests at a time agreed with the terminal and pilot, never during cargo operations or manoeuvring. Nominate an officer familiar with the system, and have permits to work, isolations and lock-out/tag-out equipment ready. If spare cards, relays or breakers are needed, coordinate them early with spare parts supply. For instruments and transmitters needing verification, consider combining the call with calibration services.
Information needed for a quotation
- Vessel name, IMO number, flag and class
- Port, berth or anchorage, ETA and ETD
- Description of the fault or planned work, alarm messages and when the problem started
- System maker, model and software version, and switchboard voltage (LV or HV)
- Photographs of nameplates, panels and damaged components
- Whether class attendance, PSC deficiency close-out or a maker-authorised engineer is required
- Spares available on board and any parts that must be sourced
vslSafety coordinates a suitable marine electrical or automation provider at the vessel’s port and confirms scope, attendance time and cost before mobilisation.
Frequently asked questions
How often should the emergency generator be tested?
SOLAS II-1/42 and 43 require provision for periodic testing of the complete emergency system, including the automatic starting arrangements, but leave the exact frequency to the company and flag. Most safety management systems specify a weekly start and a periodic on-load test. Following Tokyo MoU findings, many operators now also include a periodic controlled blackout test, because routine test switches do not always exercise the same circuits used in a real power failure.
What is a controlled blackout test?
A controlled blackout test simulates a genuine loss of main power, for example by opening the main switchboard bus-tie with systems in automatic mode, rather than using a test button. It checks that the emergency generator starts, that transitional power supplies hold and that the emergency switchboard connects automatically. It must be planned carefully, with the vessel in a safe condition, and with the port and terminal informed where required.
Do electrical modifications need class approval?
Changes to main or emergency power supplies, switchboards, essential services or automation systems covered by class notation usually require drawings to be approved and the installation to be surveyed. Check with the vessel’s class before work starts so the attending engineer can provide the documentation the surveyor will ask for.
Can a local electrician work on a maker’s automation system?
Hardware faults such as failed sensors, wiring or power supplies can usually be repaired by an experienced marine electrician. Software changes, parameter adjustments and licence-protected functions often require a maker-authorised engineer, and warranty terms may insist on it. vslSafety can arrange either, and will state which type of engineer is being offered so the owner can decide.
