Meta description: An MCC pressurised cabin houses motor controls, switchgear and drives in a protected workspace for offshore and industrial applications.
An MCC pressurised cabin is a containerised room that houses electrical control equipment in offshore and industrial environments. It combines a protective enclosure with systems that help maintain suitable conditions for the equipment inside.
MCC stands for Motor Control Centre. It controls and protects electric motors used to operate equipment such as pumps and fans. An MCC cabin can also accommodate switchgear, control panels and motor drives, depending on the project.
Why Put Electrical Controls Inside a Cabin?
Electrical equipment needs protection from its surroundings. On an offshore installation, rain, salt-laden air and changing weather can make an exposed location unsuitable for sensitive controls.
A dedicated cabin brings the equipment into an enclosed workspace. It also gives personnel somewhere to read displays, check panels and carry out planned maintenance.
For example, a project operating several motor-driven pumps may need a central location for their controls. An MCC cabin can house those controls together, with access arranged for the people responsible for operating and maintaining them.
What Does Pressurisation Do?
Some sites also need protection against potentially flammable gases outside the cabin.
In simple terms, pressurisation uses a controlled supply of air to maintain a higher pressure inside the room than outside. When correctly designed and operated, this helps limit the entry of the surrounding atmosphere.
The pressurisation system works alongside monitoring and protective controls. If the required conditions are lost, the system follows the alarm or protective response defined for the project.
Pressurisation and air conditioning have different roles: one supports the cabin’s protection arrangement, while the other manages the indoor temperature. Both need to suit the equipment and location.
What Can Be Included in a TLS MCC Cabin?
TLS MCC cabins can be configured around the equipment and the way the room will be used. Depending on the agreed scope, features can include:
- Space for MCC panels, switchgear and motor drives.
- Air conditioning, ventilation and pressurisation.
- Fire and gas detection.
- Lighting, sockets and electrical cabling.
- Access doors and emergency escape provisions.
- Fire-rated construction where required.
The combination is selected for the project. Features such as A60 fire protection and hazardous-area suitability should be confirmed for the actual cabin configuration. TLS pressurised container solutions
Where Can These Cabins Be Used?
MCC cabins can support offshore installations and industrial projects that need a dedicated room for electrical controls.
The appropriate arrangement depends on the location. A cabin in a designated safe area may have different protection requirements from one installed in a hazardous area. Equipment size, operating conditions and maintenance needs also influence the final configuration.
The containerised format allows the room to be manufactured and fitted out before delivery. Site connections and commissioning still need to be completed according to the project scope.
FAQ
Is an MCC cabin the same as an MCC panel?
No. The MCC panel controls and protects motors. The cabin is the room that houses it and any other specified equipment.
Does every MCC cabin need pressurisation?
No. The required protection depends on the installation location and project assessment.
Are all TLS MCC cabins supplied with the same certification?
No. Applicable standards and certification scope are confirmed for the project.
A custom MCC enclosure is a prefabricated containerized room for Motor Control Center panels and related electrical or automation equipment Depending on the project, it may house MCC panels, PLC cabinets, variablefrequency drives, switchgear, control panels and auxiliary systems
TLS configures the enclosure around the equipment layout, operating environment, site interfaces and required project standards It can be supplied as a prepared enclosure or with selected internal systems installed before delivery Positive pressure, fire protection and hazardousarea features are projectspecific options, not standard requirements for every MCC enclosure
What Does an MCC Enclosure Provide?
The enclosure provides a defined space that can:
- support and protect installed equipment;
- provide space for operation and maintenance;
- organize cable entry and internal routing;
- maintain the required internal environment;
- provide interfaces for site power, control and communication systems; and
- allow more work to be completed before the unit reaches the site
It does not replace the MCC equipment; it provides the space in which that equipment is installed and operated
How Is the Structure Configured?
TLS can adapt the enclosure structure to the equipment and installation conditions Configurable items may include:
- overall dimensions and internal layout;
- equipment supports and reinforced floor areas;
- antislip or antistatic flooring;
- doors and service access;
- cableentry openings and penetration locations;
- external connection points;
- lifting and transport features; and
- corrosionprotection system
Coating requirements are selected for the intended environment C4 or C5 systems may be specified where appropriate
Equipment weights, cabinet positions and service clearances are coordinated during design so that structural supports, openings and access arrangements match the selected equipment
How Are Temperature and Airflow Managed?
MCC panels, VFDs and other electrical equipment release heat, so the enclosure may require ventilation, air conditioning or another cooling arrangement
Available provisions can include:
- ventilation openings and air ducts;
- mounting points and cutouts for air conditioners;
- heatexchanger interfaces;
- louvers, rain hoods and dust filters; and
- insulated walls and ceilings
The final arrangement depends on equipment heat output, outdoor conditions and the permitted internal temperature
What Can Be Prepared for Electrical Installation?
An MCC enclosure can be prepared as an equipmentintegration platform rather than delivered as an untreated empty shell Depending on the agreed supply scope, TLS can provide:
- equipment mounting bases;
- cable trays and routing paths;
- floor or wall cable entries;
- lighting and internal power distribution;
- earthing provisions;
- equipment labels and interface identification; and
- space for customerinstalled panels and auxiliary systems
Early coordination of cabinet dimensions and cable routes helps ensure that trays, openings and access areas are positioned for the actual equipment The MCC panels may be installed by TLS, the customer or another system integrator, depending on the contract
Can an MCC Enclosure Be Used in a Hazardous Area?
Yes, when it is specifically designed and approved for that application TLS has supplied pressurized MCC shelters for hazardousarea projects, including Zone 2 applications
A hazardousarea MCC shelter may require positivepressure ventilation, gas detection, alarms, shutdown functions, firerated construction and suitable external electrical equipment The exact protection concept depends on the area classification, equipment installed inside and applicable project requirements
A standard MCC enclosure does not become suitable for Zone 1 or Zone 2 simply by adding a fan Pressurization and explosionprotection features must be treated as a coordinated system and verified under the required compliance basis
What Can Be Completed Before Delivery?
Factory prefabrication can include structural fabrication, coating, internal flooring, equipment supports, cable trays, openings, lighting, ventilation components and other agreed systems Work completed in the factory can reduce the amount of fabrication and assembly required at the project site
The delivery level is flexible Common scopes may include:
|
Delivery scope |
Typical content |
|
Prepared enclosure |
Structure, coating, flooring, openings and equipment supports |
|
Partially fitted module |
Prepared enclosure plus selected electrical, HVAC or safety systems |
|
Integrated MCC module |
Enclosure with project-defined equipment and systems installed and tested within the agreed scope |
These descriptions explain possible delivery levels; they are not fixed TLS packages Site foundations, external utilities, field connections and commissioning responsibilities remain subject to the project contract
Where Are MCC Enclosures Used?
Containerized MCC rooms can provide permanent or relocatable electricalcontrol space for oil and gas facilities, offshore platforms, chemical plants, energy projects, mines and remote industrial sites
FAQ
1. Is every TLS MCC enclosure pressurized?
No Pressurization is used when required by the installation environment and project protection concept
2. Does an MCC enclosure include the MCC panels?
It can, but not necessarily TLS can supply a prepared enclosure or support a more integrated delivery scope, depending on the contract
3. Can the layout be customized?
Yes Dimensions, cabinet arrangement, doors, cable entries, flooring, HVAC provisions and other interfaces can be configured for the project
4. Does a prefabricated MCC enclosure eliminate all site work?
No Prefabrication can reduce site work, but foundations, external connections, installation checks and commissioning may still be required
Conclusion
A TLS custom MCC enclosure is a configurable containerized space for MCC panels and related control equipment Its structure, coating, flooring, cable routes, environmental control and safety systems are selected for the actual application The product can range from a prepared enclosure to an integrated module, while hazardousarea and positivepressure features are included only when required by the project.
Product brochures:
This article evaluates the advanced "MCC Switchgear Pressurised Shelter Solution" designed for heavy-duty industrial, onshore, and offshore environments. By integrating custom-engineered shipping containers with active HVAC pressurization, specialized fire and gas detection, and robust structural compliance, TLS provides an all-in-one plug-and-play solution. This design protects sensitive, non-explosion-proof electrical equipment against harsh climates and hazardous gas atmospheres.
Key Questions Answered in This Guide
- What unique challenges do standard electrical switchgears face in offshore or hazardous environments?
- How do the standard and custom sizing metrics of TLS shelters accommodate complex site constraints?
- What specific structural codes and safety standards govern these localized equipment rooms?
- Why do past operational failures highlight the necessity of integrated turnkey engineering?
The Critical Role of Pressurized Electrical Shelters
In modern industrial landscapes—particularly in offshore oil platforms, maritime operations, and chemical processing facilities—protecting high-value electrical assets is a foundational safety mandate. Systems like Motor Control Centers (MCC), Switchgears, Motor Circuit Protection (MCP), Variable Frequency Drivers (VFD), and Variable Speed Drivers (VSD) form the backbone of field operations.
However, this sophisticated equipment is often non-explosion-proof. When deployed into environments with corrosive sea spray, extreme temperatures, or volatile ambient gases, unshielded electronics are prone to rapid degradation and catastrophic arc-flash triggers.
The "MCC Switchgear Pressurised Shelter Solution.pdf" addresses this vulnerability by housing components within a weather-resistant, walk-in containerized module. By maintaining a positive internal pressure gradient, the shelter mechanically prevents external hazardous gases and dust from infiltrating the clean electrical staging environment.
Technical Specifications and Dimensional Versatility
Engineering flexibility is crucial for adapting to variable deck spaces or onshore footprints. TLS builds its shelters around highly scalable, modular designs that can be altered based on equipment volume and site installation requirements.
The regular module dimensions feature standard configurations with uniform width profiles alongside variable heights (2591 mm or 2896 mm) to accommodate tall switchgear lineups:
- 15ft Module Dimensions: Length of 4572 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.
- 20ft Module Dimensions: Length of 6058 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.
- 40ft Module Dimensions: Length of 12096 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.
Beyond these standard baselines, customized special sizes are frequently engineered to construct dedicated shelter rooms tailored for non-standard or oversized equipment configurations.
Standards, Applications, and Architectural Features
Target System Applications
The shelter operates as a centralized control hub capable of housing a diverse range of critical sub-systems:
- Medium Voltage (MV) and Low Voltage (LV) switchgears are arranged in fixed, compartmentalized, or withdrawable units.
- Centralized control panels incorporating Programmable Logic Controllers (PLC), MCC, and remote monitoring/operation infrastructure.
- Auxiliary field equipment essential to localized power distribution.
Safety and Structural Standards
To withstand aggressive physical handling and high-consequence operational zones, the architectural design complies with strict international benchmarks:
- Structural Integrity: Built in accordance with DNV2.7-1 and EN12079 structural design codes. The inclusion of dedicated ISO corner castings and integrated pad-eyes guarantees secure crane and vessel handling during onshore or offshore loading operations.
- Hazardous Zone: Certified for installation across Safe Areas, Zone 2, and Zone 1 hazardous environments.
- Electrical & Thermal Compliance: Complies strictly with the IEC60079-13 standard for pressurized room protection. Thermal and passive fire safety is reinforced with an A60-rated passive fire protection barrier.
Integrated Life Safety Features
Every module functions as an active safety device featuring an interconnected web of protection mechanisms:
- Environmental Controls: Heavy-duty HVAC systems paired with automatic, fail-safe fire dampers manage temperature and airflow.
- Monitoring Systems: A unified, combined pressurization fire and gas panel works continuously alongside dedicated fire and gas detection hardware.
- Personnel Security: Entryways are secured with specialized air-lock door systems to prevent pressure loss during entry/exit, while emergency egress is supported via a built-in escape hatch and onboard fire extinguishers.
- Infrastructure Utilities: Outfitted with baseline internal electrical cabling, high-visibility lighting systems, and utility sockets.
Key Performance Observations and Historical Lessons
Quantifiable Operational Metrics
Field assessments under harsh testing criteria demonstrate the efficiency of this integrated design approach. Comprehensive sea-worthy packing combined with standardized ISO dimensions minimizes transport friction across maritime and road freight channels. On-site deployment timelines indicate that the inclusion of plug-and-play plugin connections, backed by detailed installation manuals, reduces local installation overhead and configuration errors by significant margins when compared to traditional stick-built field rooms.
Aggregated Lessons from Industrial Failures
Historically, the decentralized procurement of individual system components (sourcing enclosures, HVAC, and fire panels from separate vendors) has led to systemic field integration failures. Industry data reveals several common failure modes that this all-in-one solution corrects:
- Loss of positive pressure containment due to misaligned door seals or uncoordinated HVAC pressure balancing.
- Delayed fire damper actuation caused by communication lag between third-party gas detectors and main control relays.
- Premature structural buckling or corrosion failure around lift points on non-certified containers during high-seas transfers.
By providing a single-source solution covering everything from initial structural fabrication to final system integration, TLS eliminates these multi-vendor incompatibilities.
Key Takeaways of the TLS Shelter Solution
- Comprehensive Protection: Protects standard, non-explosion-proof electronics from destructive external climates and hazardous vapors.
- Rigorous Certification: Built to satisfy DNV2.7-1, EN12079, A60 fire ratings, and IEC60079-13 international standards.
- Flexible Engineering: Available in standard 15ft, 20ft, and 40ft frames, as well as customized footprints tailored to specific project needs.
- Turnkey Delivery: Streamlines field deployment via integrated plugin interfaces and single-source design-to-fabrication quality control.
TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions.
Wherever you are in the world, TLS can help you. Please contact us.
Product brochures:
Offshore total pressurised container solutions
Offshore pressurised mud logging cabin brochure
MCC | Switchgear | VFD | VSD pressurised shelter
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