Custom-made disconnector for Statnett, Norway

Plzeň, Czech Republic, August 2018 – A custom-made design for vertical disconnectors has been created for Statnett, an important system operator in the Norwegian energy system. The company operates about 11'000 km of high-voltage power lines and has about 150 stations all over Norway. To modernize the current substations, a new and very special design of disconnectors was required.

Custom-made disconnector for Statnett, Norway

Statnett wanted to replace old and unsuitable disconnectors in their substations with disconnectors designed to their requirements to modernize the power grid. SERW was invited to create not only a new design for the disconnectors but also to provide motor drives with remote control. This allows the customer to remote control his devices without the need of on-site personnel.

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  • The project underwent multiple stages and the finished solution is almost ready to be delivered:

    • One-pole and three-pole vertical disconnectors for outdoors
    • Very special custom-made design
    • 145 kV voltage level (three-pole)
    • 300 kV (upgrading to 420 kV) voltage level (one-pole)
    • Motor drives with remote control

  • Different to the old “knee-type” vertical disconnector with the current path broken into two parts, the new disconnector is designed with the current path as a single part, acting like a “knife”.

    “Thanks to our development department including the best constructors and technicians at SERW, we were able to tackle the challenge and provide a sustainable solution”, Jiří Brychta, managing director of SERW, explained. “The new disconnector not only strengthens our portfolio but also our competitiveness”.

    SERW is part of the Swiss-based R&S Group, a leading provider in selected niches for power products. Founded in 1993 from the Skoda factory, SERW has developed into one of the leading switching device manufacturers in Europe. Thanks to many years of experience in the field of power products with a focus on switching devices, SERW is a competent and reliable partner for customers all over the world.