G59 Generator Interface Protection 

Generators that connect to the electricity grid should be compliant with the Distribution Code. This code is regularly consulted upon with a wide range of stakeholders and has recently been updated with new Generator Interface Protection settings for Small Scale Generators.

Generators are required to update the interface protection settings on your generator by 30th September 2019 and confirm this has been completed. 

This technical update is designed to:
  • Reduce nuisance tripping and ad hoc disconnection of small scale generators
  • Enable the 2020 Government targets for renewable energy to be met
  • Bring small scale generators in line with large scale generators who implemented the settings change last year
G59 Protection Update Guidance Document provides the full technical details of the required changes and the reasons why they are being implemented.
Download guidance document    

You will need to:
  • Confirm to NIE Networks by 29 June 2018 that you have received the G59 notification and that you have engaged a G59 contractor:
G59 reply form   
  • Engage a qualified engineer to update the protection settings at your generator.
G59 contractors    
  • For generators with a high voltage connection, book an appointment for an NIE Networks’ engineer to witness a protection test of the new settings.

In some circumstances the application of the new protection settings may require new equipment which could delay the completion of the changes; your G59 contractor can provide further guidance on this matter.

NIE Networks will refer any generator which fails to make the protection changes by the required date to the Utility Regulator for further action.

G59 Settings Changes Information Evenings


NIE Networks are hosting a number of information evenings to provide customers with the opportunity to discuss the details of the changes that need to be made at their generation sites.

The location and dates for the events are given in the table below, customers are welcome to attend on any of the dates where NIE Networks’ staff will be available to deal with their queries and discuss all aspects of the G59 settings changes and SCADA requirements. Tea and coffee will be available on arrival; customers are welcome to attend at any time during the evening.

Date Venue Time
Monday 4th March 2019 Glenavon Hotel, Cookstown 7.30 – 9.00PM
Wednesday 6th March 2019 Silverbirch Hotel, Omagh 7.30 – 9.00PM
Monday 11th March 2019 Seagoe Hotel, Portadown 7.30 – 9.00PM
Wednesday 13th March 2019 Tullyglass Hotel, Ballymena 7.30 – 9.00PM


Contact us if you have any further queries.

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