SF6 Replacement

The latest in a series of Calls for Innovation seeks potential solutions to a problem area identified by the distribution network operators (DNOs).


For many years the power networks have been using Sulfur Hexafluoride (SF6) gas as a dielectric and insulating material in their transmission and distribution equipment.


SF6 with a dielectric strength of approximately three times that of air at atmospheric pressure lends itself well to being used as an insulator within substations (Gas Insulated Substations – GIS). Using SF6 to insulate high voltage components from earthed metal closures has enabled such assemblies to be more compact and allowed substation footprints to be reduced.


It is recognised that SF6 is an extremely effective insulator and interrupting medium. However, SF6 is also an extremely potent greenhouse gas. As responsible businesses the power networks have investigated and developed new ways to manage and reduce the impact of their network, business activities and operations on the environment and this includes their use of SF6.


The ultimate objective of this call is to identify whether there are any known SF6 replacements that are currently available that could be used in existing or new equipment or whether there are potential new systems or materials that could be developed to replace the reliance of SF6 as an insulating and interrupting medium within power networks equipment in the future.


Find out more about this call for innovation here.


To register initial interest and request an expression of interest form please call the Energy Innovation Centre on 0151 348 8040 and quote the reference number Call DNO-17-06.


Please note, specific EOI forms are created for each individual Call for Innovation and the matching form will be required to progress any submissions.


The closing date for registering initial interest is 8 March 2018.  Please note office open hours are between 9am and 5pm Monday to Friday.


It is anticipated that a presentation day will be held on 23 April 2018.