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Alstom Grid displays its T155-420 kV gas-insulated substation in its latest architecture: compact and smart grid ready

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Alstom Grid displays its latest generation of T155 gas-insulated substation (GIS) at the 2013 GCC Power in Abu Dhabi, taking place from 18 to 20 November. The T155 is designed to meet the future challenges of electrical networks up to 420 kV, 63 kA, 5000/6300A. All applications are ideally covered: power generation, transmission and heavy industry.

The substation, which is 40% more compact than its previous version, has a reduced footprint, and is easier to access at ground level. The reduced size is mainly due to the single-chamber circuit-breaker that requires less energy to operate, reliably provided by a pure spring drive. The bays are assembled and tested in factory for the most stringent quality checks, easier transport and erection times are reduced by 30%.


With this product, Alstom sets the world benchmark in digital substations. Embedded digital monitoring and control functions communicate via the IEC 61850 protocol, making the solutions fully digital with all the benefits that this entails: interoperability, ease of configuration, reliability, availability, real-time operation, enhanced communications capabilities and reduced costs of ownership. All the asset health data is collected through the monitoring and can be compiled and analysed becoming a key part of the decision making when maintaining or replacing equipment.


Jean Nakache, Alstom Grid Vice-President for GIS said: We created the T155 with our customers in mind and based on continuous interaction with them. It is the latest success in Alstom Grids 45 years experience in GIS technology, a welcome new addition to the existing 20,000 bays now installed in 100 countries. 

Alstom Grid is also committed to implementing greener products and the new Alstom T155 is no different. Its SF6-sealing technology and expert digital monitoring prevents gas from being released into the environment and eco-design principles used at every stage of product development ensure that its environmental impact is reduced by 15% when compared to previous models.



About Alstom

Alstom is a global leader in the world of power generation, power transmission and rail infrastructure and sets the benchmark for innovative and environmentally friendly technologies. Alstom builds the fastest train and the highest capacity automated metro in the world, provides turnkey integrated power plant solutions and associated services for a wide variety of energy sources, including hydro, nuclear, gas, coal and wind, and it offers a wide range of solutions for power transmission, with a focus on smart grids. The Group employs 93,000 people in around 100 countries. It had sales of over 20 billion and booked close to 24 billion in orders in 2012/13.


Alstom Grid has one clear vision: to develop innovative solutions for a flexible, reliable, affordable and sustainable electrical grid, everywhere. We design, manufacture, install and service the power transmission and distribution products and systems that empower the planets low carbon economy... for now and for the future.

Alstom Grid has over 130 years experience and ranks among the top three in the electrical transmission sector with an annual sales turnover of more than 4 billion. Alstom Grids 19,000 employees are spread across 88 manufacturing and engineering sites worldwide and have one common mission: be our customers trusted partner, from the source to the city.

We are energising a smarter world with Alstom.


Press Contacts 

Majed Al-Majed (Alstom Near & Middle East):

Tel: +971 4 2929 848

Nathalie Bourotte (Alstom Grid):

Tel: +33 1 49 01 62 17



Alstoms compact T155 gas-insulated substation