What is the grid connection process for a data center in Romania?

In Romania, large power consumers connect to the national transmission grid (operated by Transelectrica) via an ATR (Aviz Tehnic de Racordare) process regulated by ANRE under Order 59/2013. The developer submits a connection request; Transelectrica conducts a 6–12 month technical study defining the MW allocation, voltage level, connection point, and required grid works.

What does 650 MVA mean for a data center?

650 MVA is the total installed capacity of the adjacent Transelectrica substation. It represents the physical power infrastructure already in place. A data center developer would apply to Transelectrica for a consumer ATR of 50–200 MW from this substation — the ATR process determines the exact allocation available without requiring new substation construction.

FAQ · Grid Infrastructure

How Does Data Center Grid Connection Work in Romania?

From ATR application to energisation — the complete process for large power consumers connecting to the Romanian transmission grid.

The Romanian Grid Connection Framework

Romania's high-voltage transmission grid is operated by Transelectrica SA. Large power consumers (≥1 MW) connect under ANRE Order 59/2013, which mandates the ATR (Aviz Tehnic de Racordare) technical approval process.

650 MVA

Adjacent substation
confirmed capacity

3×400 kV

Transmission corridors
2 operational · 1 building

6–12 mo

ATR study duration
under ANRE 59/2013

Step-by-Step Process

Connection Request — Developer submits application to Transelectrica with technical parameters (MW, voltage, load profile)
ATR Study — Transelectrica models grid impact, defines connection point, required works (transformers, switchgear, protection systems)
ATR Issuance — Technical approval issued with binding technical conditions
Connection Agreement — Commercial contract specifying works, costs, and timeline
Grid Works & Energisation — Developer funds agreed grid works; Transelectrica energises the connection

What 650 MVA Means at Resita

The Transelectrica substation adjacent to the Resita site operates at 400/220/110 kV with 650 MVA installed capacity. This means the physical infrastructure — transformers, protection systems, busbars — already exists and is operational. A data center developer applying for 50–200 MW consumer ATR at this node avoids the 2–4 year delay and €50–200M cost of building a new substation from scratch.

The ATR for this site was initiated in April 2026. The developer partner will receive the ATR results as part of the technical due diligence package.

Related: ATR process deep dive · Infrastructure page · MVA glossary