Energy Distribution
Holtab is 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.
Compact secondary substations (CSS) for today’s and tomorrow’s electricity grids
Our compact secondary substations (CSS) are designed and optimised for the electricity distribution networks of today and tomorrow. While our standard products often fulfil every need, sometimes unique adaptations are required.
Meet future demands
Our compact secondary substations (CSS) should last at least 40 years and we always expect them to be scalable. We use proven technologies, but also incorporate new ones that meet future demands.
A long-term, turnkey partner
Knowledge, service and cooperation are our guiding principles. We build products based on your challenge and our shared knowledge. Put us to the test.
Personal safety our highest priority
Our compact secondary substations (CSS) are constructed with the highest priority for personal safety, with plenty of space and well proven technology to deliver a safe product.
Our compact secondary substations (CSS)
We build compact secondary substations (CSS) in both sheet steel and concrete and offer both standard stations as well as unique architect-designed buildings. The design, colour choice, surface finish and more can be customised according to your wishes.
Broad portfolio for all applications
A sheet steel compact secondary substation (CSS) provides greater possibilities for customisation, even if we also have an extensive portfolio of standard solutions. As a material, sheet steel is flexible and durable.
Customisable
Solutions customised to requirements.
Plug and Play
Minimises installation time on site.
Personal safety
Designed and tested with a focus on safety for the installer and surroundings.
Digitalisation
Digital solutions for metering, communication and automation.
According to standard
The stations fulfil the current
IEC 62271-202 standard.
Customer site
Meets the requirements of IBH24. Connection of customer installations 1-36 kV to the electricity grid.
Product data
Transformer
Oil insulated or
dry insulatedLow-voltage switchgear
HMS
Floor membrane
<IP4X
Load class
K15
Corrosion class
C5 for 25 years/C4 for 40 years
Medium-voltage
12–24 kV
Materials
Aluzink
Snow load zone
4.5
Protection enclosure class
IP23D
Earthing system
20kA
Transformer up to 3150 kVA
- Compact secondary substation (CSS) in aluzinc with steel foundation.
- Transformer oil insulated/dry insulated up to 1600 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Available in any colour and exterior design option.
Medium voltage 12–24 kV • Transformer up to 3150 kVA
- Compact secondary substation (CSS) in aluzinc with steel foundation.
- RMU medium-voltage switchgear 12-24 kV.
- Transformer oil insulated/dry insulated up to 3150 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Designed and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Available with separate IT compartment.
- Available in any colour and exterior design option
Medium-voltage 12–24 kV • Transformer up to 2x1600 kVA
- Compact secondary substation in aluzinc with steel foundation.
- RMU medium-voltage switchgear 12-24 kV.
- Transformer oil insulated/dry insulated up to 2x1600 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Designed and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Available with separate IT compartment.
- Available in any colour and exterior design option.
Medium-voltage 12–24 kV • Transformer up to 2000 kVA
- Mobile compact secondary substation (CSS) in aluzinc.
- RMU medium-voltage switchgear 12-24 kV.
- Transformer oil insulated/dry insulated up to 2000 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Designed and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Holtab’s metering cabinet for high-voltage measurement incl. CT/VT.
Meets the requirements of IBH 21. Connection of customer installations 1-36 kV. - Available in any colour.
Dimensional drawings
Medium-voltage 12–24 kV • Transformer up to 2 x 1600 kVA
- Compact secondary substation (CSS) in aluzinc with steel foundation.
- RMU medium-voltage switchgear 12-24 kV.
- Transformer oil insulated/dry insulated up to 1600 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Designed and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Holtab’s metering cabinet for high-voltage measurement incl. CT/VT.
Meets the requirements of IBH 21. Connection of customer installations 1-36 kV to the electricity grid. - Available in any colour and exterior design option.
Dimensional drawings
Low-voltage 12–24 kV • Transformer up to 1250 kVA
- Compact secondary substation (CSS) in aluzinc with steel foundation.
- Air-insulated medium-voltage equipment NAL/F 12–24 kV.
- Transformer oil insulated/dry insulated up to 1250 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- Designed and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Available in any colour and exterior design option.
Dimensional drawings
Medium-voltage 12–24 kV • Transformer up to 1000 kVA
- Compact secondary substation (CSS) in aluzinc with steel foundation.
- Air-insulated medium-voltage equipment NAL/F 12–24 kV.
- Transformer oil insulated/dry insulated up to 1000 kVA.
- Modular low-voltage switchgear HMS up to 2500 A.
- DDesigned and type tested according to standard IEC 62271-202.
- Arc-proof IAC-AB 20 kA 1s.
- Available in any colour and exterior design option.
Add-on services
Security agreement
With our security agreement, you can ensure the operation of your power plant and avoid costly outages.
Spare parts and maintenance
We tailor solutions to include preventative maintenance and preparedness for maximum availability.
Connect digital services
Much of the technology we install in Holtab’s products can be connected. This means that everything, from metering and automation to energy efficiency and communication, is possible.
Knowledge and inspiration
ReferencesCustom-built compact secondary substation (CSS) secures electricity supply on an island
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.
ReferencesWorking with Tesla on new innovations
Holtab has supplied several customised substations to Tesla, fully adapted to their supercharger concept. The aim is to promote the development of products for the charging infrastructure of tomorrow.
