Industries — Data Centers
Grid-to-Rack Expertise
for Data Centers.
TerraWatt is the technical bridge between utility power and critical IT infrastructure. Our expertise spans the complete power chain — from 400 kV transmission substations to IT rack power distribution.
400MW+
Campus Experience
HV to LV
400kV to IT Rack
Tier I–IV
Compliance
Our Expertise
End-to-End
Capability
01
HV/MV Substation Design & Integration
Dedicated HV substations (up to 400 kV) and MV distribution (6.3 kV–35 kV) for hyperscale and colocation facilities.
- Grid interconnection and utility coordination
- Protection coordination from grid to facility
- Redundancy architecture (N+1, 2N, 2(N+1))
- Complex multi-phase campus deployments
02
Power System Studies & Analysis
Comprehensive ETAP-based analysis ensuring optimal performance, safety, and protection coordination.
- Load flow and short circuit studies
- Arc flash analysis (IEEE 1584)
- Protection coordination (HV to LV)
- Harmonic analysis and power quality
03
End-to-End Commissioning & CxA
Complete power chain validation from transmission line to server rack with mobile testing capabilities.
- Independent Commissioning Authority (CxA)
- Primary & secondary testing (own equipment)
- Integrated Systems Testing (IST)
- Grid-to-rack protection verification
Track record
Selected projects
- 2026
Data Center Electrical System Refurbishment & Diesel Generator Replacement
Rijeka, CroatiaDesignOngoing - 2026
Data Center Electrical System Refurbishment & Extension
Zagreb, CroatiaDesignOngoing - 2025
Testing & Commissioning — Hyperscale Data Center
Viborg, DenmarkCommissioningOngoing - 2025
CxA — Hyperscale Data Center Build
Skien, NorwayCxAOngoing - 2025
CxA — 800 kW DC Colocation Extension (2.5 MW Total)
Zagreb, CroatiaCxA - 2025
Commissioning Management — Hyperscale DC Build, Eemshaven
Eemshaven, NetherlandsCxA Commissioning - 2025
Commissioning Management — Hyperscale DC Build, Winschoten
Winschoten, NetherlandsCxA Commissioning - 2025
Testing & Commissioning — Hyperscale Data Center
Eemshaven, NetherlandsCommissioning - 2025
Testing & Commissioning — Hyperscale Data Center
Winschoten, NetherlandsCommissioning - 2024
Feasibility Study — 500 kW Colocation Data Center Refurbishment
Zagreb, CroatiaDesign - 2024
Diesel Generator Replacement — Data Center
Zagreb, CroatiaDesign - 2023
Phase 5 — 11 kV Hyperscale Data Center, 60 MW
BelgiumCxA Commissioning - 2022
20 kV Data Center Substation Refurbishment
CroatiaDesign Engineering - 2022
Phase 4 — 11 kV Hyperscale Data Center, 60 MW
BelgiumCxA Commissioning - 2022
Colocation Data Center Extension — 700 kW Concept Design
—Design - 2021
11 kV Hyperscale Data Center, 60 MW
BelgiumCxA Commissioning
Get in touch
Let's talk
about your project.
Our team of experts is ready to help with your data center and substation commissioning needs.
- Phone
- +385 (1) 3815 145
- info@terrawatt.eu
- Office
- Radnička cesta 1A, Business park 1A, 10000 Zagreb, Croatia