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New type of pantograph disconnectors for ČEPS

Plzeň, Czech Republic, July 2020 – For the substation Prosenice in the Czech transmission grid new disconnector types with the high short-circuit capacity of 63 kA were delivered. The disconnectors are used to ensure that the electrical circuit is completely de-energized for servicing or maintenance. The pantograph design is ideal for minimal space requirements.

It is the first delivery of the new pantograph disconnectors – type 3SPJU-4240 (420 kV, 4000 A, 63 kA/1s, 160 kA). During the FAT, with the presence of ČEPS representatives, the new disconnectors have been tested successfully according to the standard routine tests.

Some specifications of the project:

  • 420 kV, 4000 A, 63 kA/1s
  • 3 pcs pantograph disconnector type 3SPJU-4240
    (first delivery of the type)
  • 3 pcs vertical disconnector type 3SSJ-4240
  • 6 pcs vertical disconnector type 3SSJU-4240
    (with one earthing switch)
  • Ordered in November 2019
  • Delivered in July 2020

The transportation was handled with much care which was proven by the included shock indicators. Shock indicators are required to check unusual possible accidents which can happen during transport.

After the installation under the supervision of R&S SERW, the final adjustment and putting into service was provided by the highly-skilled employees of R&S SERW.

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.