East-West Interconnector

Transmission grids are often interconnected so that energy can flow from one country to another. This helps provide a safe, secure, reliable and affordable energy supply for everybody. EirGrid Interconnector DAC owns the East West Interconnector linking the electricity grids in Ireland and Great Britain. We sell capacity on the East West Interconnector through auctions.

The East West Interconnector is a 500 MW High Voltage Direct Current (HVDC) link between the electricity transmission grids of Ireland and Great Britain. At 500 MW it is one of the largest voltage source conversion (VSC) HVDC links in operation worldwide.

We sell capacity on the East West Interconnector through auctions, which you can learn more about below.


Safety is core to how EirGrid does business. To determine if your proposed works may be close to the route of the interconnector, please consult our safety notice and refer to the following links:


UK Line Search Before-U-Dig

If you need any additional information, call (01) 2370924 (Ireland) or 01244 288 353 (UK).

The Heath and Safety Authority have published a Code of Practice (CoP) on avoiding danger from underground services. The CoP provides practical guidelines to ensure compliance with legal requirements. It is available online here.

In the event of an emergency relating to the East West Interconnector cables, EirGrid will be contacted immediately. The emergency contact number is 01 2370924.

A detailed Irish Route Map is available here.

A detailed Wales Route Map is available here.

Key Information

Update 04.10.2016 - A dedicated joint task force has been established between EirGrid and ABB, to analyse the root cause as well as to define and implement the measures required to put the link back into service at the earliest opportunity. The schedule to put the link back into service is dependent on the necessary lead time required to manufacture and supply some of the specific components. The task force is looking into all practical measures which can help accelerate the process to minimise outage time and has already very concrete measures identified and being validated.

Update 30.09.2016 - A fault has occurred on the East West Interconnector, an electricity connection between Ireland and Great Britain, which will cause the Interconnector to be out of service until the 28th February 2017. A technical issue occurred in the switching back on of equipment following routine maintenance. The repair of the converter station requires the removal of the damaged parts and the manufacture, delivery, and installation of replacement parts and subsequent testing of the repaired facility. The current programme to carry out this work identifies a return to service time for the end of February 2017.

For further information, call Stephen Gannon on +353 (0)1 23 70164 .

For all the information you need on trading as a market participant, auctions and results, outages, open consultations, and relevant documentation, click here.


Open Consultation

EirGrid Interconnector DAC seek to consult on the Access Rules and Charging Methodology of the East West Interconnector (EWIC)

The interconnector owners are also using this consultation to advise interested parties of their intention to adopt a new version of the Harmonised Allocation Rules (“HAR”) for allocations of Financial Transmission Rights in the new I-SEM and to seek views on their proposed border specific annex to the HAR.

Please click here for the consultation paper.

Responses should be received by 5 p.m. on Wednesday 7 September 2016

Contact Information

Interconnector Administrator

Tel: +44 (0)28 90707450


EirGrid Main Reception

Tel: +353 (0)1 677 1700


Emergency Number

Tel: +353 (0)1 237 0924