Load sharing distributes active and reactive demand between parallel generators. Fuel or speed control governs active power, while excitation or voltage regulation affects reactive power.
Seanav Marine provides independent service assessment. Send the equipment identity, symptoms and attendance window so the required capability, parts and any manufacturer involvement can be confirmed.
What should the service assessment check?
The following items define a starting scope for a competent service assessment. The actual test method and acceptance criteria must come from the installed equipment documentation and the agreed job scope.
- kW and kVAr measurement and scaling.
- Governor and AVR operating modes.
- Load-sharing communication and polarity.
- Stable response during approved load changes.
What must be distinguished before testing?
A fixed sharing percentage cannot be assumed for every plant. Diagnose active and reactive imbalance separately.
Why distinguish active and reactive load imbalance?
The observations concern different aspects of generator operation. Record kW, reactive load and frequency/voltage together with the connected controllers. Avoid adjusting governor and excitation settings indiscriminately from one unequal-load indication.
Details that help assess this equipment
- Generator kW and reactive-load records.
- Governor/AVR and load-sharing models.
- Bus condition and active operating modes.
Equipment references and their scope
- DEIF: PPM 300 designer handbook — An equipment-specific example of marine generator, emergency and shore-connection control.
- ABB: power and energy management — Integration of power resources, switchboards, protection and controllers.
These references explain equipment or system examples. They do not establish the fitted configuration, SEANAV manufacturer authorization or a vessel’s acceptance limits. Use the installed model’s documentation for the actual work.
Related equipment guidance: Load Shedding and Blackout Prevention · Power Management Systems (PMS) · Marine Automation Service, Repair & Troubleshooting
How service is planned
Agree the affected machinery, safe isolation, operational restrictions and equipment-specific test plan with the vessel. Preserve as-found settings and available configuration backups. Confirm proposed changes and compatible replacements before work.
Record the completed work, functional-test results, outstanding defects and operating limits. Changes affecting approved functions need the appropriate maker, owner or approval-body review.
Maintenance, survey and documentation
Maintenance intervals and calibration methods depend on the manufacturer’s instructions, service conditions and vessel PMS. There is no blanket annual calibration or five-year overhaul rule for every automation component. Statutory and Class survey requirements must be established for the particular vessel and equipment.
A service report records the work performed and observed results. It does not by itself issue or renew a ship’s statutory certificate. Manufacturer authorization, specialist calibration and survey witnessing must be confirmed where required; Seanav Marine’s independent service role does not imply direct OEM agency or universal Class approval.
Request generator load sharing systems support
Send the vessel name and IMO number, port, ETA/ETD, equipment maker and model, fault description, alarm screenshots and relevant drawings or logs. State whether the request involves routine maintenance, a defect, replacement, retrofit or an upcoming survey. Attendance depends on access, engineer availability, parts and the confirmed scope.
service@seanav.org · +971 58 568 1197 · Contact the operations desk
Reference framework
These sources explain the relevant system or regulatory context. They do not replace the installed equipment manual or prove the applicability of a particular rule to every vessel.
- IMO: SOLAS convention and chapter scope
- IACS: UR E22 computer-based systems
- DEIF: active and reactive load-sharing principles
- DEIF: AGC 150 operating modes and power-management context
About this guide
Published by Seanav Marine. Editorial and source review: , AI-assisted. This general service guide is based on the references shown; it is not a signed vessel-specific engineering procedure. Equipment manuals and the responsible technical personnel determine the job requirements.
For technical assessment or a factual correction, contact Seanav Marine with the equipment identity and supporting documents.