Marine Electrical Panel

Marine Electrical Panels: Main Switchboards, Emergency Panels & Control Consoles

Custom-engineered marine switchboards and power distribution panels built to Class rules (DNV, ABS, CCS, LR, BV). Designed for commercial vessels, offshore platforms, and workboats, our systems integrate low-voltage distribution, automatic power management (PMS), and generator control into IP22 to IP56 enclosures.

Ship's Main Switchboard
The Ship's Main Switchboard is the heart of your vessel’s power system. It receives electricity from the generators and distributes it safely to all onboard equipment. We know marine environments...
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Shore Power Outlet Box
The Shore Power Outlet Box is a key device for ships at port. It connects the vessel to the onshore power supply. When your ship uses shore power, you can turn off the auxiliary generators.
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Vertical PLC Control Cabinet
The Vertical PLC Control Cabinet is the brain of your ship's automation system. It is installed in the engine control room. It receives signals from sensors and sends commands to critical equipment.
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Product Series

Main Switchboards (MSB)

Primary distribution hubs for marine power generation systems. Configured for generator synchronization, load sharing, preferential trip protection, and shore power interconnection up to 690V / 6300A.

Emergency Switchboards (ESB)

Standby power control panels designed for automatic mains failure (AMF) transfer. Connects directly to emergency generators or battery banks to power navigation, steering gear, fire pumps, and safety alarms within 45 seconds of blackout.

Distribution Panels & Motor Control Centers (MCC)

Sub-distribution boxes and direct-on-line (DOL) / soft-starter / VFD enclosures for engine room auxiliaries, pumps, winches, and deck machinery. Enclosures built to IP44 or IP56.

Bridge & Engine Control Consoles

Ergonomic consoles integrating navigation power supplies, main engine monitoring modules, alarm annunciator panels, and thruster control interfaces.

Technical Specifications & System Configuration

Parameter	Specification Range / Standard
Rated Operational Voltage	AC 380V / 400V / 440V / 690V (50/60 Hz); DC 24V / 110V / 220V
Rated Insulation Voltage	Up to 1000V AC
Busbar Rated Current	Main Busbar: 400A–6300A; Earth Busbar: 50% of Main Busbar Rating
Short-Time Withstand Current (Icw)	35kA–100kA (1 second)
Ingress Protection (IP)	Engine Room: IP22 / IP44; Open Deck / Exposed Areas: IP56 / IP66
Enclosure Material & Thickness	Cold-rolled steel sheet, 2.0–2.5 mm; or AISI 316L stainless steel
Surface Treatment	Zinc-rich primer + marine polyurethane topcoat (RAL 7032 / RAL 7035); minimum 120 μm dry film thickness
Internal Components	Schneider, ABB, Siemens, Eaton, or marine class-approved equivalents
Operating Temperature	-25°C to +55°C; ambient engine room reference: 45°C
Class Compliance	DNV, ABS, CCS, LR, BV, RINA

Target Applications

Commercial Vessels:

Bulk carriers, container ships, chemical tankers, and LNG carriers requiring main switchboards with automated power management systems (PMS).

Offshore & Service Craft:

Offshore supply vessels (OSV), tugboats, dredgers, and crew transfer vessels operating under high vibration and salty environments.

Specialized Vessels:

Fishing trawlers, passenger ferries, and research vessels needing customized motor control centers (MCC) and emergency power transfer panels.

Customization & OEM Capabilities

Electrical Architecture:

Integration of DEIF AGC, Siemens PLC, or Woodward controllers for automatic synchronization, peak shaving, and automatic load shedding.

Component Selection:

Freedom to specify circuit breaker brands (Air Circuit Breakers / Molded Case Circuit Breakers) to meet vessel spare part standardization.

Busbar Fabrication:

Tinned high-conductivity E-CU copper busbars (99.9 percent purity), heat-shrink insulated, and anti-vibration phase clamping.

Structural Modularization:

Sectionalized shipping splits to fit through narrow engine room access hatches during retrofits or newbuild installation.

Quality Control & Factory Acceptance Testing

Factory Acceptance Test (FAT):

Simulating generator parallel operation, reverse power protection, preferential tripping, and blackout recovery in the presence of shipowner representatives and Marine Class surveyors (CCS, DNV, ABS, LR).

Material & Plating Check:

Copper purity testing, paint film thickness measurement, and salt spray testing for structural enclosures.

Electrical Insulation & Hi-Pot Test:

Insulation resistance testing (DC 1000V, over 10 Mohm) and dielectric power-frequency voltage test (AC 2.5kV / 1 min).

Thermal Imaging Inspection:

Temperature-rise testing on main busbar joints under full load conditions.

Packaging, Documentation & Delivery

Export Packaging: Vacuum-sealed moisture barrier foil, desiccants inside the enclosure, reinforced anti-vibration internal bracing, and fumigated solid timber crates for ocean freight.

Technical Documentation Package:

Final As-Built Electrical Drawings (Single Line Diagram, Terminal Diagram, Panel Layout).

Marine Class Certificates (Type Approval & Individual Inspection Certificates).

Factory Test Reports (FAT Protocol, Megger Test, Dielectric Test).

Operation & Maintenance Manuals plus Bill of Materials (BOM) with part identification codes.

Lead Time: 4 to 8 weeks depending on engineering complexity, component procurement, and surveyor scheduling.

FAQ

Q: Can you supply individual Class Certificates (DNV, ABS, CCS, LR) for each panel?

A: Yes. We submit electrical schematics to the designated classification society for drawing approval, arrange surveyor witnessing during FAT, and supply official individual certificates for each completed switchboard.

Q: How do you ensure electrical contacts remain reliable under heavy ship vibration?

A: All internal wiring uses tinned marine-grade multi-strand copper cables with cross-linked polyethylene (XLPE) insulation. Terminal blocks use spring-cage clamp connections. Busbars are bolted using Belleville washer assemblies and torqued to specified values with tamper-evident indicator marks.

Q: We are retrofitting an existing vessel. Can you customize dimensions to fit our hatch dimensions?

A: Yes. We design modular panels with transport splits. Switchboards can be shipped in separate vertical sections (cubicles) and reassembled inside the engine room, with pre-drilled busbar connection links and labeled plug-and-play wiring harnesses.

Q: What brands of circuit breakers and PLC units do you use?

A: Our standard designs feature Schneider Electric, ABB, and Siemens components due to their worldwide marine service network. We also accept customer-nominated brands specified in your shipbuilder maker list.

Q: How are the panels protected against marine corrosion?

A: Enclosures undergo shot blasting (Sa 2.5 standard), followed by an epoxy zinc-rich primer and a marine-grade polyurethane coat totaling at least 120 um thickness. Exposed hardware, hinges, and latches are made of AISI 316L stainless steel.

Q: What is required from us to receive an accurate quotation?

A: Please provide your Single Line Diagram (SLD), vessel main generator parameters (kW, Voltage, Frequency), preferred component brands (Maker List), and required Classification Society.

Request a Quote

Send us your Single Line Diagram (SLD) or project specifications. Our marine electrical engineers will provide a technical proposal and quotation within 2 business days.
Email: sales@yzdlchina.com Drawing Formats Accepted: DWG, DXF, PDF

We're well-known as one of the leading marine electrical panel manufacturers and suppliers in China. We warmly welcome you to wholesale high quality marine electrical panel at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.

Vertical PLC Control Cabinet, Shore Power Outlet Box, marine electrical panel