Eaton MV Switchgear Chosen for Stockholm Rail Tunnel

SVS/08 Medium Voltage (MV) switchgear from Eaton’s Electrical Sector was chosen for use in the Stockholm City Line project
Photo by Eaton

Goodtech Projects & Services AB, a leading Swedish technology company, has chosen SVS/08 modular Medium Voltage (MV) switchgear from Eaton for use in its project for Trafikverket’s City Line project in Stockholm that includes the delivery of substations. Trafikverket is the state-run Swedish Transport Administration, which has started a huge effort that will see commuter trains running through a new six kilometre tunnel, greatly increasing the capacity of the rail network in Stockholm and the surrounding area. The Stockholm City Line project is scheduled for completion by 2017.

The initiative involves the construction of two tunnels – a running tunnel for the trains and a service tunnel to act as an emergency escape route and to house ancillary equipment. Within the service tunnel, eleven substations operating at 22 kV will be provided. Goodtech Projects & Services has contracted Holtab AB, one of Scandinavia’s leading substation manufacturers, to build the substations. All these substations will be equipped with Eaton SVS/08 MV switchgear.

After carefully analysing the technical capabilities and value for money offered by MV switchgear from different potential suppliers, Eaton’s SVS/08 was selected. The SVS/08 and SVS/12 are among the brands approved for use in railway applications in Sweden and feature a modular design, which will allow for easy future expansion. The equipment was also chosen for its proven track record as a safe and reliable system, and for its use of vacuum interrupters in combination with solid insulation.

The vacuum interrupters offer long service lives and require no routine maintenance, while the high-quality epoxy resin insulation eliminates the risk of corona discharge and arc faults. A further benefit of this combination is that it eliminates the need to use SF6, which is noxious and a notorious greenhouse gas, as an insulator for the switchgear. This is particularly important for the City Line project, as the equipment will be installed in a tunnel where gas leakage would be especially problematic.

The first of the substations has recently been completed and has been subjected to extensive factory acceptance testing, during which it met all of its design targets. Goodtech Projects & Services AB is pleased with the performance of the substation, and is looking forward to seeing the equipment installed and in service in all eleven of the City Line substations.

To learn more about Eaton, visit www.eaton.eu. For all of the latest news follow us on Twitter via @Eaton_EMEA or find our Eaton EMEA LinkedIn company page.

Eaton’s electrical business is a global leader with expertise in power distribution and circuit protection; backup power protection; control and automation; lighting and security; structural solutions and wiring devices; solutions for harsh and hazardous environments; and engineering services. Eaton is positioned through its global solutions to answer today’s most critical electrical power management challenges.

Eaton is a diversified power management company providing energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power. A global technology leader, Eaton acquired Cooper Industries plc in November 2012. The 2012 revenue of the combined companies was $21.8 billion on a pro forma basis. Eaton has approximately 102,000 employees and sells products to customers in more than 175 countries.

The City Line project in Stockholm will enable trains running through a new six km tunnel and is scheduled for completion by 2017
Photo by Mikael Ullén

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