Panel builders have relied on welded steel frames for decades because they're strong and rigid. But as projects move faster and systems grow more complex, that same rigidity has become a liability. A new generation of modular switchgear is taking its place.
From Welded Frames to Modular Building Blocks
Traditional low-voltage switchgear was built around welded steel frames and sides. They were strong, but largely fixed once assembled, so later changes meant costly rework or replacement. Modular systems take a different approach: precision-engineered frames, bolted assemblies and standardised components that snap together, configured to the application rather than welded to one final design.
Why Panel Builders Are Making the Switch ?
Flexibility across projects. Industrial plants, commercial buildings, data centers and renewable energy sites all pull switchgear requirements in different directions. Modular systems let a panel builder add sections, change cable access or plan for expansion using proven building blocks, instead of engineering each board from scratch.
Faster builds, shorter lead times. Welded construction runs through cutting, welding, grinding, cleaning and painting before assembly starts. Modular components arrive ready to build, shortening the path from order to energisation.
Precision that's hard to match by hand. Laser cutting, CNC forming and robotic manufacturing hold tolerances that manual welding struggles to repeat, showing up in better door alignment, sealing and dimensional accuracy across every unit.
Easier to expand later. Additional loads, renewable generation, battery storage and EV charging keep adding demands to existing infrastructure. Where welded switchgear often needs extensive rework to expand, modular sections can be added or reconfigured with far less disruption.
A lighter environmental footprint. Damaged sections can be replaced individually instead of scrapping a whole assembly, and standardised parts cut manufacturing waste and are easier to reuse during upgrades, both of which matter as embodied carbon becomes a bigger factor in purchasing decisions.
Room for the digital layer. Power monitoring, energy management and predictive maintenance are now standard expectations. Modular platforms are built with dedicated space for sensors and communication equipment, which matters more every year as digitalisation moves into the switchboard itself.
None of this makes welded construction obsolete. Some heavy industrial and specialised applications still call for it. But for most commercial and industrial installations, modular systems now offer the better combination of performance, flexibility and lifecycle cost.
How Rittal Approaches Modular Power Distribution ?
Rittal's own answer to this shift centers on two systems working together. The RiLineX busbar platform is built around tool-free, click-in assembly on a standardised 60 mm system, keeping full contact hazard protection and short-circuit resistance up to 65 kA. It's rated up to 800 A, supports both AC and DC applications and carries IEC 61439 and UL 508A approvals for global deployment.
For larger switchgear assemblies, Ri4Power builds on the VX25 enclosure platform, supporting circuit-breakers from major manufacturers and scaling up to 6300 A. Because it's tested as a complete system rather than assembled ad hoc, panel builders can configure sections for incoming supply, distribution and outgoing circuits while keeping full IEC 61439 compliance across the assembly.
Why This Matters for Greek Panel Builders
Greek panel builders and system integrators increasingly compete for projects that require IEC 61439 certification and fast delivery, whether for local industrial plants or exports into other EU markets. A modular platform shortens the path from order to energised system without sacrificing certification or short-circuit performance, which matters most when project timelines are set by the customer, not the panel shop.
Modular construction isn't replacing welded switchgear because welded systems failed. It's taking over because modular design fits the demands of faster projects, expanding infrastructure and a digitalising grid better than a fixed welded frame can. For panel builders, that shift shows up directly in build time, flexibility and how confidently a system can grow to meet tomorrow's load
FAQ
Why is switchgear moving from welded to modular construction?
Modular systems let panel builders configure, expand and upgrade switchgear using standardised components, instead of engineering and welding a fixed design for every project.
Does modular construction sacrifice strength or safety compared to welded frames?
No. Modular platforms like RiLineX and Ri4Power are tested as complete systems and certified to IEC 61439, matching the safety and short-circuit performance expected from welded designs.
What's the difference between RiLineX and Ri4Power?
RiLineX is a 60 mm tool-free busbar platform rated up to 800 A, suited to compact power distribution. Ri4Power builds on the VX25 enclosure for larger switchgear assemblies, scaling up to 6300 A.
Can existing welded switchgear be expanded using modular components?
In many cases, yes, though it depends on the original design. This is exactly the limitation modular systems are designed to avoid in new installations.
Is modular switchgear suitable for all applications?
Most commercial and industrial installations suit modular construction well. Some heavy industrial or highly specialised environments still call for fully welded designs.
Does modular construction support multiple circuit-breaker brands?
Yes. Ri4Power is designed to work with circuit-breakers from major manufacturers, giving panel builders flexibility in component sourcing.
How does modular switchgear support digitalisation?
Modular platforms are built with dedicated space for sensors and monitoring hardware, making it easier to add power monitoring and predictive maintenance without redesigning the enclosure.
Why does this matter for panel builders exporting outside Greece?
IEC 61439 certification carries across EU markets, so a modular, certified system built once can meet the same compliance requirements wherever it's shipped.