Professional Marine Air Circuit Breaker Testing, Maintenance and Fault Rectification
Kraken Marine Electric provides professional ACB testing and maintenance services for marine air circuit breakers installed in main switchboards, emergency switchboards, generator panels and critical power distribution systems onboard vessels.
Air Circuit Breakers are one of the most important protection components in a ship’s electrical network. A properly tested and maintained ACB ensures safe power distribution and reliable protection coordination. Furthermore, it ensures operational continuity under demanding marine conditions. Regular onboard ACB testing, inspection and maintenance helps prevent unexpected blackouts, protection failures, overheating, mechanical malfunction and costly off-hire situations.
Our service covers complete functional testing, mechanical inspection, electrical checks, cleaning, lubrication, contact assessment and fault rectification for all major ACB brands and models.
Our Marine ACB Testing Service
Kraken Marine Electric performs detailed air circuit breaker testing using professional test equipment and proven maintenance procedures. Each breaker is inspected and tested according to manufacturer recommendations and marine electrical safety practices. In addition, our quality-controlled service process is applied.
Our ACB testing and maintenance scope includes:
- Long Time trip test
- Short Time trip test
- Instantaneous trip test
- Protection relay function checks
- UVT / Undervoltage Trip test
- Closing coil test
- Opening / shunt trip coil test
- Charging motor test
- Spring charging mechanism inspection
- Mechanical operation check
- Interlock and auxiliary contact inspection
- Main contact inspection and cleaning
- Arc chute inspection
- Insulation resistance checks when required
- General cleaning, lubrication and adjustment
- Onboard troubleshooting and fault rectification
- Test report and service certification
Why ACB Testing Is Essential Onboard Ships
Marine electrical systems operate under harsh conditions such as vibration, humidity, temperature variation, dust contamination and continuous load changes. Over time, these factors can affect the mechanical and electrical performance of air circuit breakers.
Periodic ACB maintenance helps verify that the breaker will trip correctly during overload, short circuit or undervoltage conditions. This is essential for protecting generators, transformers, busbars, switchboards, cables and connected equipment.
A professional ACB test can identify issues such as:
- Delayed or failed trip operation
- Weak or faulty UVT coils
- Closing or opening coil problems
- Charging motor failure
- High contact resistance
- Worn or contaminated main contacts
- Mechanical sticking or slow operation
- Damaged arc chutes
- Loose terminals or auxiliary circuit faults
- Incorrect protection settings
- Signs of overheating or insulation deterioration
Early detection of these problems reduces the risk of electrical failure and improves the reliability of the vessel’s power distribution system.
Onboard ACB Maintenance and Fault Rectification
Our technicians carry out onboard air circuit breaker maintenance with minimum disruption to vessel operation. Depending on the condition of the breaker, the service may include removal from the panel. In addition, it may include detailed mechanical inspection, internal cleaning, lubrication of moving parts, contact surface cleaning, coil testing and operational checks before reinstallation.
If a fault is detected during testing, Kraken Marine Electric can support the vessel with technical troubleshooting and rectification. Our goal is not only to test the breaker. In addition, we aim to restore reliable and safe operation of the complete protection system.
Supported ACB Brands and Models
We provide testing, maintenance and fault diagnosis for all major marine ACB brands and models, including but not limited to:
- Terasaki
- Hyundai Electric
- Mitsubishi
- Schneider Electric / Merlin Gerin Masterpact
- ABB
- Siemens
- Other marine-type air circuit breakers
Whether the vessel is equipped with older mechanical protection units or modern electronic trip units, our team can perform the required inspection, testing and maintenance procedures.
Quality-Focused Marine Electrical Service
Kraken Marine Electric delivers ACB testing and maintenance services with a strong focus on safety, documentation, technical accuracy and service quality. Each service is carried out with attention to protection reliability, switchboard safety and long-term operational performance.
Our quality approach includes:
- Professional onboard service procedures
- Detailed inspection and test records
- Clear reporting of findings
- Practical recommendations for corrective action
- Technically competent marine electrical service support
- Service documentation for vessel records and technical audits
We understand that reliable electrical protection is critical for safe vessel operation. For this reason, every ACB test and maintenance job is handled with a professional, systematic and quality-oriented approach.
ACB Testing Report and Certification
After completion of the service, Kraken Marine Electric can provide a detailed ACB test report and service certificate including breaker details, test results, observations, detected defects and maintenance actions performed.
This documentation helps vessel owners, managers, superintendents and crew maintain accurate technical records for planned maintenance systems, inspections and class-related follow-up.
Professional Onboard ACB Service
Kraken Marine Electric supports vessels with reliable, efficient and professional onboard ACB testing and maintenance solutions. Our services are suitable for shipyards, dry dock periods, planned maintenance, annual inspections, troubleshooting cases and emergency technical support.
For safe switchboard operation, correct protection performance and dependable marine electrical systems, regular ACB testing is an essential part of responsible vessel maintenance.
Contact Kraken Marine Electric for professional marine air circuit breaker testing, maintenance and fault rectification services.
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