GE introduces SF₆ and g³ compatible GIL

Jun 24, 2022
Posted by Patrick Haddad

GE has released gas-insulated lines compatible with both SF₆ and their more environmentally friendly replacement g³.

Thanks to their high transmission capacities and reliability, gas-insulated lines and busbars (GIL and GIB, respectively), have been in use for over half a century in power plants and in high voltage substations.

Until now, it seemed difficult to replace SF₆ in existing lines without a drastic adaptation of the GIL. That’s why GE has optimized its GIL design so that it can be used with SF₆ as well as with its g³ insulating and switching gas which has a 99% reduced carbon impact compared to SF₆.

This dual gas GIL gives transmission system operators (TSO) the choice to install GE’s SF₆-free g³ GIL today or to prepare their new high voltage substations for a replacement of the SF₆ gas with GE’s g³ gas later.

GE’s dual gas GIL has been optimized to work with SF₆ as well as with g³ with the same performance. That’s why it is easy to replace the SF₆ gas by g³ with a simple adaptation kit comprising filling valves, molecular sieves and the g³ gas. If the gas monitoring system is a conventional one, it will need to be replaced by a digital one such as GE’s BWatch.

Due to the optimization of the GIL design, the amount of gas (SF₆ or g³) in the GIL is reduced by at least 15% compared with the previous version.

Source and image: GE


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