Supporting General Electric with g3 technology installed in fixed and mobile gas-insulated substations.

g3 gas-insulated substation at Denmark’s Cerius (Photo: Business Wire)


Our team has prepared the detailed engineering for the protection and control for substations with General Electric’s Gas Insulated Switchgear (GIS). We have extensive experience in engineering with this type of technology, for newly built electrical substations and also in the overhaul and expansion of the existing substations of the different Spanish electricity companies (REE, UDF, IBERDROLA, ENEL, NATURGY), for all voltage levels (66kV, 132kV, 220kV, 400kV) and both indoor and outdoor installations.

The work done with this type of GIS Substations includes new homologation projects for those same electric companies, as well as the addition of conduit sections or switchgear with the new g3 (Green Gas for Grid) , a “green” technology that is a breakthrough alternative technology to SF6, which helps reduce the carbon footprint. Offering the same technical performances, dimensions and safety as SF6, g3 products are superior in that they reduce drastically Global Warming Potential (GWP).

gas insulated substation



Some of the different projects involving mobile substations carried out for GE include the execution of 10 mobile containers for the Red Eléctrica Española as the end customer. The limited space of the mobile substation – whether in a container or on a mobile platform – poses a challenge for the design and installation of the GIS and the implementation of all of the necessary equipment, as well as its commissioning at any point in the power grid.

The teams that worked together from our offices and at the customer’s facilities, participated in all phases of the project, preparing the design and full development of the electrical diagrams of the Local Control Cabinet (LCC). We also developed a connectorised solution between the cabinets which enables to speed up commissioning when used outside the container.

One of these mobile stations was developed entirely with the SF6-alternative gas (g3), and it is the first one in Spain to use this technology, marking a big step forward towards sustainability because it helps to greatly reduce the carbon footprint.

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