MCC Panels

Automatic Transfer Switch (ATS) Panel for Marine & Offshore

Automatic Transfer Switch (ATS) Panel assemblies engineered for Marine & Offshore applications, addressing industry-specific requirements and compliance standards.

Automatic Transfer Switch (ATS) Panel for Marine & Offshore

Overview

Automatic Transfer Switch (ATS) Panel assemblies for Marine & Offshore applications are engineered to preserve continuity of essential power across ship service, emergency, and auxiliary distribution networks. They are used to transfer loads between main generators, emergency generators, shore connection, UPS-backed auxiliaries, and redundant feeder incomers without unacceptable interruption to navigation, fire protection, cargo handling, HVAC, or process systems. In practice, marine ATS logic is often coordinated with a power management system, protection relays, and PLC-based start/stop sequences so that source failure, undervoltage, phase loss, reverse power, or frequency deviation can be detected and transfer initiated within the required operational envelope. Depending on the topology, the panel may employ mechanically interlocked contactors, motorized MCCBs, or ACB-based incomers with rated currents from 160 A to 6300 A, selected to match short-time withstand, coordination class, and required duty cycle. The electrical design shall be based on IEC 61439-1 and IEC 61439-2 for low-voltage switchgear and controlgear assemblies, with IEC 61439-6 applicable where the ATS interfaces with busbar trunking systems or feeder distribution assemblies. For the switching devices themselves, IEC 60947-2 governs MCCBs and ACBs, IEC 60947-4-1 applies to contactors and motor starters, and IEC 60947-6-1 covers automatic transfer switching equipment when the transfer function is incorporated into the device. Marine and offshore projects also require compliance with relevant shipboard rules such as IEC 60092 and the applicable class society requirements from DNV, ABS, Lloyd’s Register, Bureau Veritas, or ClassNK. Where the panel is located in or near hazardous areas, enclosure and installation design must consider IEC 60079 for explosive atmospheres. In installations subject to high prospective fault levels, internal arc containment and personnel protection may be specified and verified using IEC 61641 test methods. Environmental engineering is a critical differentiator. Marine-duty ATS panels are typically housed in 316L stainless steel, marine-grade aluminum, or epoxy-coated steel enclosures with IP54 to IP66 protection, depending on whether the panel is installed in a machinery space, sheltered deck location, or exposed offshore module. Anti-condensation heaters, thermostats, sunshields, drip edges, corrosion-resistant cable glands, tinned copper busbars, stainless fasteners, and vibration-resistant mounting hardware are standard measures to withstand salt mist, humidity, oil vapor, shock, and continuous vibration. Terminals and wiring accessories are selected for long-term reliability under thermal cycling and conductor movement. When the panel serves generator control or emergency service loads, segregation and accessibility become especially important; Form 3b or Form 4 separation is often used to reduce maintenance risk and preserve availability during fault isolation or feeder intervention. Typical Marine & Offshore ATS configurations include open-transition transfer for non-parallel systems, closed-transition transfer where class approval and generator synchronization permit brief overlap, and delayed-transfer logic for stabilizing source voltage and frequency before load connection. The panel may incorporate undervoltage and phase sequence relays, earth-fault monitoring, source priority selection, engine start contact outputs, load shedding interfaces, and status communications to PMS or SCADA systems via Modbus TCP, Modbus RTU, Profibus, or Ethernet/IP. Downstream integration with VFDs, soft starters, emergency lighting feeders, fire pumps, ballast systems, and HVAC loads requires careful discrimination, selectivity, and short-circuit coordination so that an upstream transfer event does not cascade into unnecessary outages. For EPC contractors, shipyards, offshore fabricators, and vessel operators, documentation must demonstrate design verification, routine testing, wiring schedules, single-line diagrams, FAT procedures, insulation levels, temperature rise compliance, and declared short-circuit ratings such as Icw and Icc. Patrion, based in Turkey, manufactures engineered marine-duty ATS panels for newbuild vessels, retrofit projects, FPSO modules, offshore platforms, and shore power tie-in systems, tailoring each assembly to footprint constraints, classification requirements, and the specified operational duty of the installation.

Key Features

  • Automatic Transfer Switch (ATS) Panel configured for Marine & Offshore requirements
  • Industry-specific environmental ratings and protections
  • Compliance with sector-specific standards and regulations
  • Optimized component selection for industry applications
  • Integration with industry-standard control and monitoring systems

Specifications

PropertyValue
Panel TypeAutomatic Transfer Switch (ATS) Panel
IndustryMarine & Offshore
Base StandardIEC 61439-2
EnvironmentIndustry-specific ratings

Other Panels for Marine & Offshore

Main Distribution Board (MDB)

Primary power distribution from transformer to sub-circuits. Rated up to 6300A. Houses main incoming breaker, bus-section, and outgoing feeders.

Motor Control Center (MCC)

Centralized motor control with starters, contactors, overloads, and VFDs in standardized withdrawable/fixed functional units.

Generator Control Panel

Genset start/stop sequencing, synchronization, load sharing, and paralleling controls.

PLC & Automation Control Panel

Process and machine control panels housing PLCs, I/O modules, relays, HMIs, and communication infrastructure.

Custom Engineered Panel

Bespoke panel assemblies for non-standard requirements — special ratings, unusual form factors, multi-function combinations.

Other Industries Using Automatic Transfer Switch (ATS) Panel

Commercial Buildings

MDB, lighting distribution, APFC, ATS, metering, BTS, capacitor bank, BMS integration

Industrial Manufacturing

MCC, PCC, VFD panels, MDB, APFC, automation panels, soft starters, harmonic filters, capacitor banks — full range

Data Centers

High-reliability MDB, PCC, ATS (STS), metering, APFC, BTS, DC distribution

Healthcare & Hospitals

ATS (critical power), MDB, generator control, lighting, metering, APFC

Renewable Energy

MDB, metering, APFC, ATS, PLC, DC distribution, capacitor banks

Infrastructure & Utilities

MDB, ATS, metering, BTS, lighting distribution, DC distribution

Frequently Asked Questions

The core assembly standard is IEC 61439-1 and IEC 61439-2 for low-voltage switchgear assemblies. If the ATS interfaces with busbar trunking or distribution runs, IEC 61439-6 can also apply. The switching components are typically selected in accordance with IEC 60947-2 for MCCBs and ACBs, IEC 60947-4-1 for contactors, and IEC 60947-6-1 for transfer switching devices. For shipboard installations, IEC 60092 and the rules of the relevant classification society, such as DNV, ABS, LR, BV, or ClassNK, are usually required. If the panel is installed in a hazardous area, IEC 60079 becomes relevant for explosion protection requirements.
Marine ATS panels are commonly built from 160 A up to 6300 A, depending on whether the application is for auxiliary services, emergency distribution, shore connection, or main feeder transfer. Lower ratings often use contactor-based transfer or motorized MCCBs, while higher ratings typically require ACB incomers with appropriate short-time withstand and discrimination performance. The final rating must be matched to the load profile, diversity, starting currents of pumps and compressors, and the fault level at the switchboard. IEC 61439 design verification must confirm temperature rise, dielectric performance, and short-circuit withstand at the declared ratings.
Both are used, but the choice depends on the process criticality and class approval. Open transition is simpler and avoids paralleling sources; it is often used where a brief interruption is acceptable. Closed transition allows short overlap between sources and can improve continuity for sensitive loads, but it requires synchronization logic, generator/PMS coordination, and approval from the operator or class society. In either case, the transfer scheme must be validated with the selected switching device, whether it is an ATS-rated contactor arrangement, a motorized MCCB, or an ACB solution compliant with IEC 60947-6-1 and the assembly requirements of IEC 61439-2.
Marine ATS panels typically use 316L stainless steel, marine-grade aluminum, or epoxy-coated steel enclosures with IP54 to IP66 protection depending on location. Anti-condensation heaters, thermostats, tinned copper busbars, stainless fixings, corrosion-resistant terminals, and sealed cable glands are standard. Vibration resistance is improved through reinforced mounting, secure wiring, and careful component selection. For offshore decks and machinery spaces, additional measures such as drip shields, breathable venting solutions, and corrosion-resistant finishes are often applied. These measures support long-term compliance with IEC 61439 environmental expectations and class society durability requirements.
Yes. In most modern installations, the ATS panel exchanges status and control signals with the ship’s Power Management System or offshore SCADA. Typical functions include generator start/stop, source health monitoring, preferred source selection, load shedding, and alarm reporting. Communications are often implemented through Modbus TCP, Modbus RTU, Profibus, or Ethernet/IP, depending on the vessel architecture. The control design must ensure deterministic transfer logic even if the communication link fails, so the ATS should retain local protection, source sensing, and interlocking independent of the network layer.
The short-circuit rating must be based on the prospective fault current at the installation point and the selected protection scheme. Common parameters are Icw for short-time withstand and Icc for conditional or prospective short-circuit current, both of which must be declared and verified under IEC 61439-1/2. In high-energy marine switchboards, this may require ACBs or MCCBs with high interrupting capacity and verified coordination with upstream generators or transformers. If the panel is near a source with high fault level, internal arc considerations may also be assessed using IEC 61641.
Form 4 segregation is recommended when operational continuity and maintenance safety are important, especially in critical shipboard or offshore systems. It separates functional units more extensively than Forms 1 to 3, helping limit the impact of a fault or maintenance intervention on adjacent feeders. For ATS panels serving emergency loads, fire pumps, navigation systems, or essential auxiliaries, Form 4 can reduce downtime and improve personnel safety. The selection should be documented during design verification under IEC 61439, with attention to accessibility, busbar segregation, cable termination arrangement, and service continuity requirements.
Yes. Patrion designs and manufactures custom ATS panels in Turkey for marine and offshore applications, including newbuild vessels, FPSO modules, offshore platforms, and retrofit tie-in projects. Assemblies can be engineered around ACB, MCCB, or contactor-based transfer architectures and matched to class society requirements, footprint constraints, and environmental ratings. Each project can include drawings, routine test records, FAT documentation, and IEC 61439-based verification data. For EPC contractors and shipyards, this means a panel configured to the exact operational duty, source arrangement, and installation environment.

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