Equipment transport for hyperscale data centres: gensets, UPS, transformers, and chillers for the major campuses of Aragón, Madrid, and Barcelona

On 18 May 2026, Digital Realty inaugurated BCN1 in Sant Adrià de Besòs, the company's first data centre in Barcelona, with 14 MW of planned IT capacity. It is not an isolated event. It is the visible face of a wave that has turned the Iberian Peninsula into a real alternative to the European Frankfurt–London–Amsterdam–Paris corridor: more than 600 MW IT forecast to be operational by 2027, across a total announced-project pipeline exceeding 7 GW. The spearhead is in Aragón, where specific investments in hyperscale data centres already exceed €50 billion between Microsoft, AWS, Box2Bit, and other developers.

Behind each megawatt of IT capacity sits a logistics chain measured in tonnes. A typical hyperscale project of 50–100 MW IT moves 90–95 heavy loads in its first phase, synchronised with commissioning windows that admit no slippage. Lead times for manufacturing critical equipment (gensets, UPS systems, transformers, MV switchgear) reach 12 to 18 months in the current European market. Every component that arrives late does not delay a delivery: it delays what the operator has promised the market. And before the servers power up, a fleet of hydraulic modulars, extendable low beds, and pilot vehicles has run the Mediterranean and Ebro Corridors with cargo that activates three administrative regimes at once.

The Spanish data centre wave, 2026–2030

Aragón holds the centre of gravity of the growth, with 2,790 MW IT planned long-term and 152 MW IT operational forecast for 2027 according to Colliers' aggregated figures. The names behind that pipeline:

• Microsoft holds the region's largest project: three initial campuses in La Muela, Villamayor de Gállego, and Zaragoza with a PIGA-approved budget of €5.356 billion, extended with a fourth campus at Puerto Venecia that raises total investment to approximately €10 billion. Aggregate surface area exceeds 283 hectares. The deployment will be built in parallel phases with independent connections to the PlaZa, Malpica, and Torrero-Valdeconsejo substations, and incorporates direct-to-chip liquid cooling.
• AWS announced on 2 March 2026, at the Mobile World Congress in Barcelona, the doubling of its commitment: €33.7 billion for the AWS Spain Region over the period 2026–2035 (€15.7 billion initial plus €18 billion additional). The plan includes 30 data centre buildings distributed across three campuses (La Puebla de Híjar and Azaila in Teruel, San Mateo de Gállego in Zaragoza, and Huesca) across 459 hectares. Of that total, €5 billion corresponds specifically to the La Puebla de Híjar campus (Teruel), announced in January 2026, with 100 MW of power already secured via Endesa and an AI focus.
• Box2Bit (Quantum Global Assets) launched the Epilon project in Épila with €3.9 billion and 33 hectares expandable to 100 hectares. First phase with 150 MW secured; total power up to 520 MW in later phases. The company also maintains its Campus Ebro project in Cariñena (€3.4 billion), pending grid-access resolution.
• QTS / Blackstone is developing Project Rodes in Aragón; Vantage Data Centers is preparing a 200 MW IT deployment in Villanueva de Gállego; Samca is leading Green IT Aragón in Luceni.

Madrid remains first operationally: 244 MW IT in the pipeline to 2027 plus 1,028 MW IT in announced projects (the Iberdrola-Echelon campus with 144 MW IT, Merlin Edged's expansion in Getafe and Tres Cantos, and new facilities from Digital Realty, Equinix, and Microsoft). Total pipeline: 1,272 MW IT, across 47 existing facilities.

Barcelona consolidates its position as the second cluster: 81 MW IT in the pipeline to 2027 and 244 MW IT in total. The project that opens the cycle, inaugurated today, is Digital Realty BCN1 in Sant Adrià de Besòs: 14 MW of planned IT capacity, 100% renewable energy, gensets fuelled with HVO100 biodiesel, signatory of the Climate Neutral Data Centre Pact, and designed to high sustainability standards. The site, close to the Barcelona Cable Landing Station in Sant Adrià, benefits from the landing point's submarine connectivity to the Mediterranean, North Africa, the Middle East, and Asia. Alongside BCN1, other planned developments include CoreWeave with an Nvidia Hopper supercomputer at Merlin Edged Barcelona, and Qilimanjaro Quantum Tech with Europe's first quantum data centre.

The 28 April 2025 blackout reinforced hyperscalers' preference for regions with electrical headroom (Aragón and Catalonia outside the Madrid centre) and accelerated the deployment of solar microgrids and on-site BESS. Catalonia also holds Spain's largest authorised BESS capacity at 2,021 MW (Red Eléctrica March 2026 data), a point we cover in detail in another article. The convergence between data centres and on-site BESS is one of the defining features of the Spanish market 2026–2030.

For the special-transport operator, this map sets the flow route: the bulk of heavy loads goes to Aragón over the next four years, with a continuing component to Catalan urban sites and a residual flow to Madrid. Operations run from Catalonia, with the Ebro Corridor as the main artery to the Aragonese hubs.

What is transported to a hyperscale campus

Two campus zones are worth distinguishing from the start, what the sector already calls (in industry English) white space and gray space. The white space is the room where the servers, racks, and network switches sit. It is a specialised general-cargo flow, not special transport. The gray space is the mechanical and electrical infrastructure that makes the white space work: gensets, UPS, transformers, chillers, MV/LV switchgear, fire-suppression systems, and cooling distribution systems. That is where the heavy flow sits, where tonnes are moved, and where the difference between arriving on Tuesday at 09:00 or Wednesday at 14:00 can collapse months of work.

Main gray-space components for a hyperscale:

• Emergency gensets. The heaviest and most critical piece. Typical hyperscale capacity: 2–5 MW per unit, weight 30–100 tonnes depending on manufacturer and configuration (with or without outdoor enclosure, with or without integrated diesel tank). Usual OEMs: Cummins, Caterpillar, MTU (Rolls-Royce), Mitsubishi, and Kohler. A 100 MW IT campus typically requires between 20 and 40 gensets depending on tier (III or IV) and redundancy (N+1 or 2N). When they arrive with a full tank or flammable residue, they activate ADR Class 3, UN1202 (diesel).
• UPS systems. The component that secures the electrical transition between grid, genset, and IT load. Three dominant architectures in hyperscale: static UPS with lead-acid batteries in a separate room (no ADR, cabinets of 5–15 tonnes); UPS with LFP lithium batteries, increasingly frequent since 2024 (UN3481, ADR Class 9, Lithium-ion batteries contained in equipment, when the UPS cabinet arrives with cells installed; UN3480, Lithium-ion batteries, when the battery modules are shipped separately, without the cabinet, for on-site integration); and dynamic or flywheel UPS (Hitec, Piller, Active Power) of 8–25 tonnes without ADR classification, a minority but growing share.
• Substation transformers. For energy evacuation to the transmission grid (typically 132 kV or 220 kV) and for internal campus distribution (11 kV, 20 kV, or 33 kV). Capacities of 5 to 80 MVA, weights 15 to 80 tonnes. The same logistics profile as BESS substation transformers and rail traction transformers. OEMs: Hitachi Energy, Siemens Energy, Hyundai Electric, ABB, SGB-SMIT, and Ortea.
• Chillers (industrial chillers). For server-room climate control. Rooftop or ground models, typical capacity 500 kW – 3 MW thermal, weight 15–60 tonnes for the large unit. OEMs: Carrier, Trane, Daikin, Johnson Controls, and Vertiv. A bulky piece but less critical than the genset by weight; the challenge is boom-crane handling at urban sites with reduced space (typical of Sant Adrià, 22@) and roof installation for rooftop chillers.
• MV/LV switchgear. Medium- and low-voltage electrical panels. Weight per section 2–8 tonnes, considerable lengths (complete panels of 10 to 30 metres). MV switchgear manufacturing lead times sit today among the longest on the list: around 18 months in the European market. OEMs: Schneider Electric, Siemens, ABB, and Eaton.
• Busduct (prefabricated electrical busway). Long, light sections, 3–6 metres per section, 100–500 kg. They do not activate an ACC by individual dimensions, but complete shipments add up in volume and must be synchronised with the rest of the project.
• Fire-suppression systems. FM-200, Novec 1230, or Inergen systems. Not ADR (inert gases), but require specific handling.
• Cooling distribution units, CRACs/CRAHs, PDUs, air handling units, structural racking. The rest of the gray-space flow, modest-to-intermediate weights, special transport when the parameters require it.

For a typical phase 1 of 50 MW IT, the sector estimates 90–95 inbound synchronised loads according to the reference case documented by Crane Worldwide. And that is just one phase: hyperscale campuses are built in 3 to 5 progressive phases, with windows of months between them.

Why this flow activates special transport

Transport to a hyperscale campus activates three administrative regimes simultaneously, something uncommon for other industrial cargo:

1. Classic special transport by dimensions and mass. A genset of ≥50 tonnes, a transformer of ≥40 tonnes, a large chiller of ≥40 tonnes, or switchgear of considerable length activates an ACC in the specific category under Anexo IX del RGV, Anexo III del RGC, and Instrucción 16/V-90 de la DGT. Component indivisibility (no genset, no transformer, no chiller is transported disassembled) is inherent to its design.
2. ADR Class 3 (UN1202, diesel). When the genset is transported with a full diesel tank or flammable residue, it activates the dangerous-goods regime in Class 3: driver's ADR Class 3 certification, shipper's declaration, labelling, written emergency instructions, and tunnel restrictions under the product's specific ADR codes. The same administrative regime as conventional fuel transport, applied to the transport of an industrial component.
3. ADR Class 9 for lithium UPS (UN3481 / UN3480). ADR Class 9 regime with a UN number different from the stationary BESS container: UN3481 (Lithium-ion batteries contained in equipment) when the batteries arrive installed in the UPS cabinet (the usual case in hyperscale), and UN3480 (Lithium-ion batteries) when the battery modules are shipped separately from the cabinet for on-site integration. Shipping documentation follows the Special Provision specific to each UN number and its packing group: shipper's declaration with the official designation under the applicable UN, UN38.3 certificates per cell, packaging markings, and (for UN3480) additional shipment restrictions, since the batteries are not contained in equipment. The security plan under Chapter 1.10 of the ADR activates when shipment parameters cross the high-consequence dangerous-goods threshold.

Convoy widths rarely exceed 3 metres in standard DC cargo; the operational exceptions are large chillers and some particular transformers. Rear overhangs rarely exceed 3 metres. The feasibility study endorsed by a chartered engineer activates according to the specific component and route.

Up to this point, a standard DC operation is comparable in regulatory complexity to other heavy industrial operations. The data centre's specific difference comes in the next layer.

The real bottleneck: synchronising four parallel flows

Data centre logistics differs from other heavy industrial transport operations in one specific way: four parallel flows, each with its own administrative regime, processing lead time, and unloading window, converge on the same site in a sequence that admits no disorder.

The four flows:

1. Classic special transport (gensets ≥50 t, transformers, large chillers, switchgear) under the ACC regime with its generic, specific, or exceptional categories according to combination parameters.
2. ADR Class 3 (genset diesel) under the dangerous-goods regime, with specifically certified drivers.
3. ADR Class 9 (lithium UPS) under UN3481 regime when the batteries arrive installed in the UPS cabinet, or UN3480 when the modules are shipped separately, with its own driver certification, distinct from Class 3.
4. Specialised general cargo (white space, busduct, PDUs, racks) under ordinary regime, but with critical synchronisation with the others.

The order matters and is stable across the sector. Hyperscale deliveries are typically scheduled like this: racking first, MV switchgear and gensets next, transformers when the evacuation substation is ready, chillers when the roof is finished, UPS before white-space commissioning, and white space at the end. A component out of order blocks the chain.

Manufacturing lead times overlay this order. In the current European market, gensets, UPS systems, transformers, and MV switchgear run between 12 and 18 months from order to delivery; some large-transformer subcategories can extend to 24 months or more depending on OEM and specification. Hyperscalers buy in advance and store at an intermediate facility while civil works advance in parallel. The special-transport operator is the piece that moves the goods from the European factory (United Kingdom, Belgium, Germany, Italy) or from the entry port to the intermediate facility, and from there to the site when the commissioning window arrives.

The physical site adds its own difficulty. Most Aragonese campuses are virgin terrain (greenfield) on industrial soil recently paved or being paved. The Catalan urban sites (Sant Adrià, 22@) are narrow: boom cranes operating in an arc, municipal night-circulation restrictions for dangerous goods, neighbours. The final access is where delivery is decided, not at the factory gate.

Later phases of a hyperscale campus coexist with white space already in operation, under SLA with end clients. Delivery of additional gensets, transformers, or UPS at a site in operation requires coordination with the client's operation: narrow windows of a few hours, night-noise restrictions, specific security protocols (credentials, internal escort, restricted access). Delivering to a greenfield site is not the same as delivering to an operational one.

The campus is measured in megawatts. Its delivery, in tonnes.

Equipment, escort, and authority: how delivery is prepared

Transport equipment selection depends on the specific component:

• Genset of 30–50 t → extendable low bed.
• Genset of 50–100 t → hydraulic modular with 4 to 6 axle lines.
• Transformer of 50–80 t → hydraulic modular with 8 to 10 axle lines.
• Chiller of 40–60 t → conventional or extendable low bed depending on equipment height.
• UPS lithium under UN3481 (cabinets of 10–15 t with batteries installed) → conventional low bed, in the ADR Class 9 chain.
• Loose battery modules under UN3480 → specialised containerisation with additional segregation restrictions.
• Genset with full diesel tank → low bed with ADR Class 3 securing.
• MV switchgear of 8–12 metres → extendable platform.

The administrative regime depends on jurisdiction. Itineraries entirely within Catalonia (Port of Barcelona to Sant Adrià, to 22@) are processed before the Servei Català de Trànsit (SCT). Inter-regional itineraries to Aragón (Barcelona to Zaragoza, La Muela, Épila, La Puebla de Híjar) are processed before the DGT, with jurisdictional handover at the Catalan border. ADR documentation (RD 97/2014, ADR 2025) applies uniformly across Spain, independent of the ACC jurisdiction.

Escort adjusts to the combination profile. Gensets and large transformers exceeding 3 metres in width require a private pilot vehicle. Combinations with width above 5 metres (uncommon in DC flow) require accompaniment by the Agrupación de Tráfico de la Guardia Civil on the state network, or by the Mossos d'Esquadra on the Catalan network. For ADR specifically, accompaniment is rare in standard Class 3 and possible in Class 9 with high quantities of lithium.

Typical DC operation itineraries:

• Aragón axis. Port of Barcelona as entry point for imported equipment from European OEMs, AP-7 south, AP-2 west, connection with N-II / A-2, Aragonese destination (Zaragoza, La Muela, Épila, La Puebla de Híjar). Distance 300–500 km, one or two days depending on the convoy.
• Catalan axis. Port of Barcelona, C-32 / N-II / B-23, urban sites (Sant Adrià, 22@). Distances 5–25 km. Municipal time and night restrictions active.
• Madrid axis (residual). Port of Barcelona, AP-2, A-2, Madrid destination. 600 km, one or two days.

Coordination with the port authority: most gray-space equipment from European OEMs enters via the Port of Barcelona — Cummins UK via ferry from Bilbao or Santander, Schneider France overland, Caterpillar Belgium by sea via Algeciras or Barcelona, Vertiv Italy by direct sea route. Specific accreditation from the Port's Centro de Servicios al Transporte is the gateway to the operation.

Common mistakes when planning data centre transport

Failure patterns recur often enough in the sector to be worth listing.

1. Treating the genset like any other industrial equipment. If it arrives with a full tank, it is special transport and ADR Class 3. If the operator does not hold current ADR Class 3 certification, the shipment is immobilised at a roadside check or at a regional border.
2. Confusing UPS chemistry and the applicable UN number. UPS with lead-acid batteries: not ADR when installed. UPS with lithium batteries in the cabinet: UN3481, ADR Class 9. Lithium battery modules shipped loose without the cabinet: UN3480, ADR Class 9 with stricter restrictions. Confusing UN3481 with UN3480 (or with the UN3536 of the stationary BESS container) is a documentary infringement the inspector catches on a first reading of the shipper's declaration.
3. Not booking the intermediate facility in time. Gensets and MV switchgear arrive between 6 and 12 months before the commissioning date. They need authorised storage. For gensets with a diesel tank: ADR Class 3 storage. For lithium UPS: ADR Class 9 storage with segregation under UN3481 or UN3480, depending on the case. The intermediate facility is booked in the planning phase, not during the construction phase.
4. Underestimating access windows at the operational site. In later phases of a campus, part of the premises is already in operation with end clients. Deliveries require narrow windows, campus-operator protocols, internal escort, and temporary credentials. Delivering to a greenfield site is not the same as delivering to an operational one.
5. Not coordinating with the evacuation substation. The grid-evacuation transformer arrives when the substation civil works are finished and the distributor has confirmed the connection window. Arriving early means a transformer in storage; arriving late means delaying campus commissioning.
6. Confusing municipal noise restrictions with ADR circulation hours. In urban Barcelona, municipal night hours intersect with prohibitions on dangerous-goods circulation in urban areas. An ADR delivery at a Sant Adrià site requires meeting both sets of restrictions; they are not the same thing.
7. Not integrating the OEM manufacturing lead time into logistics planning. If the client asks to move a genset that has not yet left the factory, there is no transport to organise. The well-prepared special-transport operator integrates the OEM manufacturing lead time into its planning and warns the shipper in advance when there is a gap between manufacturing and the works schedule.
8. Not anticipating customs documentary inspection for British OEM equipment. Cummins UK, some Schneider components, and other British OEMs require post-Brexit customs clearance. The border is not crossed by the truck; it is crossed by paperwork. Experienced operators carry pre-loaded digital documentation; the rest wait at customs.

How we approach this at PASTOR

Sixty years of family tradition in special transport from Catalonia, with consolidated operational presence on the Mediterranean Corridor (Port of Barcelona, Sant Adrià, 22@) and on the Ebro Corridor as the main artery to the Aragonese data centre hubs: Zaragoza, La Muela, Épila, La Puebla de Híjar. Specific accreditation from the Centro de Servicios al Transporte of the Port of Barcelona allows handling of equipment imported from European OEMs from its point of maritime entry.

For the components that activate ADR regime — Class 3 (UN1202) on gensets with a diesel tank, Class 9 (UN3481 when batteries arrive installed in the UPS cabinet, UN3480 when modules ship separately) on lithium UPS systems — PASTOR coordinates the operation end-to-end, keeping the shipper with a single commercial and documentary point of contact. The ADR file is integrated into project planning from the initial phase, aligned with ACC categorisation, commissioning windows, and the rest of the campus flows. PASTOR's own fleet combines conventional and extendable low beds and hydraulic modulars configurable to the component; platform sizing is adjusted case by case, from main gensets to large transformers and extensive switchgear. The qualified gestor de transporte under arts. 111 and 112 of the ROTT and RD 70/2019 closes the file before every departure.

For each data centre project (gensets from a British or Belgian factory to a campus in La Puebla de Híjar; Hitachi Energy transformers from Córdoba to Zaragoza; chillers from Italy to Sant Adrià; lithium UPS under UN3481 regime to any destination), the PASTOR operations engineering team prepares: analysis of physical parameters of each piece, ADR documentary coordination (Class 3 and Class 9 with the correct UN designation per component), ACC categorisation under DGT or SCT regime, combination configuration proposal, turning-radius and clearance simulation to the site, identification of unloading windows compatible with the EPC calendar and with the campus operator's restrictions where the site is partially in operation, and coordination with the port authority when the equipment enters via Barcelona.

When the commissioning window arrives, the component ships complete on the first try, with the documentation closed and the chain synchronised. When a new cargo class appears (the first UPS cabinet with UN3481 classification at an Aragonese campus, for example), the team identifies it before it enters the shipper's schedule. The shipper holds a single point of contact: ours.