Powersystems HV, specialist electrical engineers, are proud to announce the successful energisation of the 132 kV substation at Crystal Rig IV Wind Farm on 22nd October 2025—a major milestone in the delivery of this significant renewable energy project.
This achievement was particularly complex due to the integration required with the existing Crystal Rig II Wind Farm 132 kV compound. Through meticulous design and safe working practices around the live site, the Powersystems team successfully brought the onsite 132 kV network back online, ensuring continued operation and delivery of clean energy to the grid.
The newly installed 60 MVA transformer and point-on-wave switchgear have been fully commissioned and energised, enabling seamless connection to the Transmission Network. Only the energisation of the remaining 11 wind turbine generators (WTGs) is outstanding.
This milestone reflects the outstanding collaboration between the commissioning and SAP teams, whose efforts were instrumental in delivering this phase safely and professionally for our valued client.
Contract Award: Powersystems to Deliver Electrical Balance of Plant Works
Powersystems were awarded the contract for the Electrical Balance of Plant (EBoP) works at Crystal Rig IV by principal contractor RJ McLeod, on behalf of Fred. Olsen Renewables. This appointment reinforces Powersystems’ role as a trusted partner in delivering complex electrical infrastructure for renewable energy projects.
The scope of works includes:
- Design, supply, installation, testing, and commissioning of all electrical infrastructure
- Relocation of existing plant and equipment
- Installation of a new 132 kV hybrid circuit breaker with metering
- Extension of 132 kV overhead busbars
- Laying of 33 kV underground cable to the new substation
- Construction of a new 132/33 kV substation and 33 kV switchboard
- Development of protection systems and switchyard
- Installation of 33 kV cables and earthing system
- Implementation of HV Substation SCADA system
- Final energisation and commissioning
Crystal Rig IV: Powering Scotland’s Green Future
Crystal Rig IV is an extension of the existing wind farm located in the Lammermuir Hills, East Lothian and the Scottish Borders. The new phase will add 11 WTGs, increasing the site’s total generation capacity to 48.2 MW.
Once fully operational, Crystal Rig IV will connect to the 132 kV Crystal Rig II Substation, with power transformed and exported to the GB Transmission System via Scottish Power Transmission Ltd.
By 2025, the Crystal Rig Wind Farm will feature 102 turbines, generating over 260 MW of clean electricity—enough to power 200,000 homes.
A Proven Partnership with Fred. Olsen Renewables
Powersystems is proud to continue its successful collaboration with Fred. Olsen Renewables, having previously delivered the 138 MW Crystal Rig II project on time and within budget in 2010. This enduring partnership reflects a shared commitment to advancing renewable energy across the UK.
Fred. Olsen Renewables continues to make a significant impact, contributing £465 million to the Scottish economy and supporting 866 full-time equivalent jobs. Their commitment to community benefit is equally impressive, with £14.6 million pledged across their wind farm portfolio—including £240,000 annually from Crystal Rig IV to local communities.
Looking Ahead
The energisation of the 132 kV substation marks a major step forward in the Crystal Rig IV Wind Farm project. Powersystems remains committed to delivering the remaining works with the same dedication and expertise, helping to shape a cleaner, more sustainable energy future for Scotland.
Notes to Editors:
Contact Information:
- This article is written by Jules Daly, Marketing and Communications Manager at Powersystems.
- Email jules.daly@powersystemsuk.com Telephone 01454 318000
- Photography Copyright please credit all images used to powersystemsuk.co.uk
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Powersystems: The High Voltage Specialist of Choice
Powersystems is a leading employee-owned high voltage electrical engineering specialist with over 48 years of experience delivering safe, efficient, and high-quality infrastructure solutions across the UK.
As the first Lloyd’s NERS-accredited Independent Connection Provider (ICP), we have been delivering contestable grid connections up to 132 kV for over 28 years. Our trusted expertise spans the full project lifecycle—from design and installation to commissioning—supporting clients across renewable energy, utilities, and industrial sectors.
Since 2000, Powersystems has connected over 9.1 GW of renewable energy to the UK grid, including onshore and offshore wind, solar, hydro, tidal, and battery energy storage systems (BESS). We’ve also delivered critical infrastructure for electric vehicle charging, CHP, STOR, rotating stabilisers, and private wire networks.
Working in partnership with developers, contractors, and DNOs, we’ve connected 30% of the UK’s onshore wind farms—playing a vital role in the transition to Net Zero by 2050.
Our commitment to safety, sustainability, and innovation is embedded in our ISO-accredited integrated management systems and our ‘Priority No.1’ health and safety culture. We continue to invest in people, technology, and partnerships to remain the high voltage specialist of choice.
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