High Voltage Electrical Infrastructure Upgrade for Major UK Port Operations
Project Snapshot
| Project Detail | Information |
| Client | Alatus Engineering (for The Bristol Port Company) |
| Location | Royal Portbury Dock, Bristol Port, UK |
| Project Duration | 5 months |
| Project Value | Not disclosed |
| Services | Electrical Infrastructure, HV Installation, Switchgear & Transformer Works |
| Market Sector | Commercial & Industrial, UK Ports |
| Powersystems Role | HV specialist partner delivering switchgear, transformer and motor starter panel installation |
| Powersystems Fact: | Powersystems have supported Bristol Port for more than 28 years, providing expert high‑voltage engineering to keep one of the UK’s largest port operations running safely and efficiently. |
Client Background
The Bristol Port Company operates two major deep‑water docks—Royal Portbury Dock (RPD) and Avonmouth Dock. Together, they handle vessels up to 130,000 dwt and are among the UK’s most efficient terminals for dry bulk cargo, animal feed, grain, aggregates, minerals and wood pellets.
Royal Portbury Dock
- UK’s largest sea lock (42.7m × 365.7m × 14.5m draft)
- Handles up to 130,000 dwt vessels
- Grain loader capable of panamax vessel loading
- Four discharge units rated to 25,000 mt / 24 hrs
- Warehousing capacity: 200,000 mt plus 15,000 mt grain silos
Avonmouth Dock
- Handles vessels up to 40,000 dwt
- Equipped with Gottwald 100 mt HMC and hydraulic cranes
- Over 400,000 sq ft of bulk warehousing
- Rail‑connected for multimodal logistics
Bristol Port’s operations rely on continuous, safe and dependable electrical infrastructure—making Powersystems a long‑standing engineering partner.
The Challenge
As part of Bristol Port’s grain handling and conveyor plant refurbishment, Alatus Engineering required a trusted high‑voltage specialist to:
- Install and commission 11 kV switchgear
- Deliver a 3.3/415 V cast resin transformer
- Install 3.3 kV motor starter panels
- Manage HV terminations, testing and commissioning
- Provide HV safety documentation and Senior Authorised Person (SAP) oversight
The challenge lay in upgrading critical electrical plant without disrupting port operations—where downtime directly impacts vessel loading, cargo flows and commercial schedules.
Our Engineering Solution
Powersystems delivered a full high‑voltage installation, including:
- Supply, delivery, offloading, installation and testing of a 3.3 kV switchboard
- Supply, testing and commissioning of a 3.3/415 V ANAN cast resin transformer (IP21 rated)
- Full HV termination works at 3.3 kV
- Cold and hot commissioning across all systems
- As‑installed drawings, testing records and engineering documentation
- SAP provision for isolation acceptance, switching and permit control
- Installation of 3.3 kV motor starter panels provided as part of the wider refurbishment
Every activity adhered to Powersystems’ approved safety rules, ensuring strict compliance within a complex operational port environment.
Project Process
- Early engagement with Alatus to define installation sequence
- HV design review, equipment supply and engineering documentation
- Switchgear installation and transformer placement
- 3.3 kV cable installation and termination
- HV and LV testing, protection verification and safety checks
- Cold commissioning followed by staged hot commissioning
- Final SAP‑controlled energisation and handover
Project Facts & Figures
- Duration: 5 months
- Voltage Levels: 11 kV, 3.3 kV and 415 V
- Key Equipment: HV switchgear, cast resin transformer, 3.3 kV motor starter panels
- Sector: Commercial & Industrial / UK Ports
Technical Specifications
- 3.3 kV switchboard – supply, delivery, installation, testing
- 3.3/415 V ANAN cast resin transformer (IP21)
- HV terminations, 3.3 kV cabling
- HV/LV testing and commissioning
- Protection and control system verification
- As‑built documentation, test certificates and design updates
Partnerships
Powersystems worked alongside:
- Alatus Engineering – specialist crane and port equipment engineers
- The Bristol Port Company – end client and operational authority
Alatus brought deep expertise in crane refurbishment and maritime logistics, while Powersystems delivered the HV engineering capability required for a safe and dependable electrical upgrade.
Environmental Considerations
This project focused on electrical infrastructure, however improved reliability of grain handling systems supports:
- Reduced downtime and vessel waiting times
- More efficient port operations
- Lower indirect carbon impact from optimised logistics
Economic & Social Value
- Increased reliability of ship loader equipment
- Reduced operational risk at Royal Portbury Dock
- Enhanced safety through upgraded HV systems
- Improved operational efficiency and continuity for grain loading operations
The Results
The project was delivered on time and within the 5‑month programme, successfully completing all HV installation, testing and commissioning activities.
The upgraded electrical infrastructure now supports safer, more reliable grain handling operations, reinforcing Bristol Port’s position as one of the UK’s leading deep‑water bulk terminals.
Related Projects
- Airbus Fairlawn – 11 kV Switchgear Replacement
- London Gateway Port – HV Infrastructure Upgrade
- ABP Hull – Crane HV System Replacement
Powersystems deliver specialist high voltage engineering for critical commercial and industrial operations.
Speak to our team to support your next infrastructure upgrade.