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Upgrade of 420 kV disconnectors from 40 kA to 50 kA

Plzeň, Czech Republic, May 2020 – End-user ČEPS needs to upgrade its 420 kV disconnectors from 40 kA to 50 kA due to the increasing load of the grid. R&S SERW, together with Czech company PROFI EMG, will replace the current paths, guaranteeing an optimal and fast solution.

The existing 420 kV horizontal and vertical disconnectors are designed for the short-circuit current of 40 kA. Because of the increasing load of the grid, it is necessary to upgrade to a higher short-circuit capacity of 50 kA. The replacement of the current path is faster than replacing the complete disconnector.

Some specifications of the project:

  • New current paths for 420 kV disconnectors
  • New earthing switches for 420 kV disconnectors
  • Installation, adjustments, putting into service and tests on site
  • Duration of the project from July 2020 to June 2021
  • Substation Výškov
  • Similar projects already planned for some other substations of ČEPS

The time of delivery is given according to the switching plan of the substation, and is unchangeable, which means higher pressure on the coordination and production processes of R&S SERW.

About PROFI EMG
PROFI EMG is a Czech-based company which offers its customers comprehensive services in the fields of design, installation, revision and servicing of high and medium voltage energy systems in the energy, industrial and construction sectors.

About ČEPS
ČEPS is the main Transmission System Operator in the Czech Republic. The company is responsible for the maintenance and upgrade of 43 substations as well as 5,517 km transmission lines.

About R&S SERW
R&S 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, R&S 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, R&S SERW is a competent and reliable partner for customers all over the world.