SSAB strengthens operational reliability of hot rolling mill

Jernbro has, in collaboration with main contractor ABB, played a central role in SSAB’s modernization of its hot rolling mill in Borlänge. To future-proof availability, energy efficiency and stable operation, new drive equipment has been installed. This is an important investment for both the region and the green transition.

SSAB’s hot rolling mill is an important part of steel production, but over time the drive system has become outdated and difficult to maintain. To maintain stable production and enable continued high availability, SSAB decided to implement a comprehensive reinvestment.

The project includes replacement of six large rolling drive motors with associated converters and transformers in three phases, where the first phase was completed in summer 2025. To enable the installation, a new electrical room was also built.

VOICE FROM THE PROJECT

Mats Svensson, project manager at SSAB.

“Jernbro has performed excellent work with few improvement points. They finished on time with both pre-installations and commissioning. The commitment has been great, even during weekend work.”

Reinvestering drivlina SSAB

THE CHALLENGES were many

Tight schedule, large and heavy components, where a main transformer for example weighed 43 tons, as well as requirements for the highest safety when handling high-voltage equipment. Additionally, the installations were carried out in parallel with operations and other maintenance efforts, which required careful planning and coordination between Jernbro, ABB, SSAB and other suppliers.

Omfattande elinstallationer

EXTENSIVE electrical and installation work

Jernbro was responsible for extensive electrical and installation work on behalf of ABB.

  • Construction of ducting and cable routes to the new electrical room.
  • Installation and setup of transformers and drive systems.
  • Installation of large quantities of cable, including high-voltage cables.
  • Lifting, planning and assembly of heavy equipment.
  • New mounting points and flooring in connection with motor replacements.
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RESULTS with few points to improve

When the facility was restarted in week 34, everything went smoothly. The commissioning was completed without problems and both ABB and SSAB highlight Jernbro’s quality and commitment.

“Jernbro is easy to collaborate with and has extensive technical installation expertise. We chose them thanks to previous good experiences and they have delivered with high quality this time as well”, says Niklas Ramstedt, project manager at ABB.

The result of phase one is more stable operation, improved energy efficiency and a more secure maintenance situation. That ABB has already signed a contract with Jernbro for the next phase is clear evidence of their confidence.

“We should be proud that we can handle such large projects with our own expertise and our own resources”, says Benny Egerstad.

Do you need help with electrical and installation?

Every facility has its own conditions – and every electrical work its challenges. Whether you need support with cable installation, drive systems, transformers or heavy assembly, our specialists are here to help you. Tell us about your project and we will connect you with the right expertise.

Benny Egerstad

Group Manager Project and Calculation Electricity

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