The TenneT DIM-LLS 380kV ACCC® Reconductor Project Continues

Originally built in the 1960s, the 52 km line runs between substations in Diemen, a suburb of Amsterdam, and Lelystad City in the Markemeer. The triple-bundle, twin-circuit line needed to be upgraded to take in increasing flows of renewable energy from onshore and offshore sources, part of TenneT’s Beter Benutten Bestaande 380 kV program.

By choosing advanced ACCC® Conductor, TenneT is able to increase transmission capacity from 2,500 to over 4,000 amps with a minimum of structural work. As is typical for TenneT’s 380 kV network, the conductor is in triple-bundle configuration.

A total of 1,100 km of ACCC Warsaw conductor was supplied by Midal Cable in late 2020 / early 2021 for this project and installation started in early August 2021.The installation itself is being closely supervised by CTC Global Master Installers throughout the project. As there are at least 3 – sometimes 5 – sub-project sites and some complex road and water crossings, this has required close coordination. Further, CTC’s ACCC® InfoCore™ system was successfully deployed on part of one phase during installation.

“It’s a tough challenge for our team to supervise this installation with many moving pieces, but we have very close cooperation and regular meetings with TenneT which helps a lot,” advised Chris Morrison, CTC Global’s Regional Service Manager.

“We are satisfied with the progress of this project, thanks to the close cooperation we have with TenneT staff,” advised Peter Hughes, CTC Global’s VP Europe. “ACCC Warsaw is by now a well-known conductor to TenneT, but the project nevertheless benefits greatly from the very early planning, site visits and joint review engagements we made with both TenneT and their contractors.”

Installation works and CTC Global’s support will continue until March 2022.

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