Transmission Interface Arrangements

The Transmission Interface Arrangements (TIA) outline the terms and arrangements for interactions between SONI and NIE Networks. The TIA is designed to facilitate the efficient operation, planning, development, construction and maintenance of the transmission system.

SONI is the independent Transmission System Operator for Northern Ireland and under the conditions of our transmission licence, we are required to plan and operate the transmission system in accordance with the requirements of the TIA.

The latest approved version of the TIA can be found here.