TenneT Seeks Representative During 525 kV Cable Tests

TenneT TSO B.V. has issued a tender call for technical inspection services during the testing of a 525 kV High Voltage Direct Current (HVDC) cable system.


TenneT plans to develop 2GW offshore grid connection systems to integrate offshore wind farms into the Dutch and into the German power grid.

To be able to transport the required 2GW power, a submarine cable system operating at a voltage level 525 kV DC is needed.

TenneT initiated a development programme for the 525 kV DC submarine cable system and received positive responses from cable manufacturers in Europe and Asia.

Based on the development programme, cable manufacturers will perform tests resulting in a test certificate and a report.

The tests are expected to be performed by the cable manufacturer in the period from the third quarter of 2020 to the first quarter of 2021.

Through this tender, TenneT is seeking a consultant to attend the tests performed by cable manufacturers; be the ‘eyes and ears’ of TenneT during the tests, and check if the tests are performed according to planning, applicable standards, and TenneT requirements.

The tender remains open until 9 March.

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