Glossary · Romania · Regulatory
ATR — Aviz Tehnic de Racordare
Romania's mandatory grid connection technical approval for large power consumers.
Definition
ATR (Aviz Tehnic de Racordare, literally "Technical Connection Approval") is the mandatory permit issued by the Romanian grid operator that authorises a consumer or generator to connect to the national electricity grid. It is governed by ANRE Order 59/2013.
What it contains
- Maximum approved power allocation (MW)
- Connection voltage level (110 kV / 220 kV / 400 kV)
- Designated connection point (substation name and busbar)
- Required grid works (new transformers, lines, protection equipment)
- Cost estimate for required works
- ATR validity period (typically 24 months, extendable)
Why it matters for data centers
An ATR is a prerequisite for obtaining a Building Permit (Autorizație de Construire) for any grid-connected facility. Data center developers must obtain an ATR before construction can begin. The ATR also locks in the MW allocation — critical for securing power for hyperscale and AI training clusters.
Process overview
Application submitted to Transelectrica → 6–12 month grid study → ATR issued with technical conditions → Connection Agreement signed → Grid works executed → Energisation.
At Resita
ATR study initiated April 2026. Results will be shared with development partner under NDA as part of the technical due diligence package.