Energy distribution

The energy transition

“We are innovative when energy distribution changes”

Grid companies are facing challenges as electrification accelerates. For Holtab, this development has led to new collaborations and more innovative solutions.

“More is happening now than in decades. We at Holtab are involved now when the electricity grid is used in a new way,” says Michael Martinsson, who is a sales engineer at Holtab.

Custom-built compact secondary substation (CSS) secures electricity supply on island in Bottenviken (the Bothnian Bay)

The island of Stora Fjäderägg outside Umeå is famous for nature lovers and birdwatchers. When Umeå Energi future-proofs the island’s power supply, Holtab will be involved in delivering a custom-built compact secondary substation (CSS) with a reserve power unit.

Customised and prefabricated

As a supplier to energy companies, we have extensive experience in manufacturing primary substations, compact secondary substations (CSS) and low-voltage switchgear. While our standard products often fulfil every need, sometimes unique adaptations are required. These are customised solutions that are prefabricated and tested in a factory environment – ready to use immediately.

Wide range of compact secondary substations (CSS)

Our industry knowledge, combined with the fact that we’re an independent manufacturer of medium-voltage equipment, makes for enormous flexibility. You have virtually unlimited possibilities to choose equipment for both inside and out.

Outdoor serviced station up to 1250 kVA

Contents and spaces

Medium voltage installation 12–24 kV.
Transformer oil insulated insulated up to 1250 kVA.
Modular low-voltage switchboard HMS.
MSP / TRAFO / LSP / IT in separate rooms.

Benefits

Modular and standardised substations.
Steel substations made of Magnelis, with a concrete foundation.
Standardised colours and options for exterior design.
Designed and type-tested according to standard IEC 62271-202.
Arc-proof IAC-AB 20kA 1s.

Outdoor serviced station up to 3200 kVA

Contents and spaces

Medium-voltage installation 12–36 kV.
Transformer oil insulated/dry insulated up to 3200 kVA.
Modular low-voltage switchboard HMS.
MSP / TRAFO / LSP / IT in separate rooms.

Benefits

Steel substations made of Aluzink, with minimal environmental impact.
Standardised colours and options for exterior design.
Designed and type-tested according to standard IEC 62271-202.

Mobile outdoor serviced station up to 2500 kVA.

Contents and spaces

Medium-voltage installation 12–24 kV
Transformer oil insulated/dry insulated up to 2500 kVA.
Modular low-voltage switchboard HMS.
MSP / TRAFO / LSP / IT in separate rooms.

Benefits

Steel substations made of Aluzink, with minimal environmental impact.
Robust construction for various environments, specifically customised for handling and transport.
Designed and type-tested according to standard IEC 62271-202

Indoor-serviced station up to 2 x 2000 kVA

Contents and spaces

Medium-voltage installation 12–36 kV
Transformer oil insulated/dry insulated up to 2 x 2000 kVA
Modular low-voltage switchboard HMS.
Transformers in separate rooms

Benefits

The concrete substations are made from prefabricated wall elements.
The facade is available in various matrix-cast designs.
Optional colours and the ability to customise the exterior design.
The substations comply with the applicable IEC 62271-202 standard.
Arc-proof IAC-AB 20kA, 1S is ensured with the selection of MSP switchgear.

Indoor-operated substations for heavier equipment

Contents and spaces

Available with various foundation options, such as an 800 mm concrete foundation, concrete slab on ground, or for installation on plinths.
Designed for heavier primary switchgear up to 72,5 kV.

Benefits

Unique design for each specific project.
Constructed with high-quality building elements, free from organic materials.
Meets high standards for good insulation, fire resistance, and corrosion resistance, and can be designed for a total weight of up to 60 tons.

Add-on services

Substation automation solutions

We offer complete solutions from leading suppliers. As such, they are equipped with a central RTU/PLC unit and the number of I/O units, indicators, remote communication equipment and power supply required to meet your exact needs.

Retrofitting and rebuilding

Modernising your plant, known as retrofitting, prolongs its life cycle and reduces the risk of unplanned downtime. We are happy to help with retrofits and rebuilds.