BESS – 400kV connection

DACI iterated the earthing package to support safe construction and operational reliability across the BESS, 400kV compound and harmonic filter plant.

• Integrated earthing layouts from overall site down to plant-level details
• Above-ground earthing drawings for 400/33kV transformer, surge arrestors, CVTs, CTs, EMVTs and CSEs
• Harmonic filter compound, harmonic filter and capacitor bank earthing drawings
• Installation support on bonding lead size, link box earth connection, cleating and lug details
• Constructability focus around 400kV compound blinding and earth rod/tape interfaces

A coordinated earthing showcase that demonstrates DACI capability on transmission-connected storage schemes, with clear treatment of BESS, 400kV compound and harmonic filter interfaces.

Supporting the UK's Low-Carbon Future

The scheme supports the transition toward a more flexible, low-carbon power system by providing large-scale battery storage connected to the transmission network. The earthing package reinforces DACI's capability in technically demanding, interface-heavy EHV infrastructure.

• Supports large-scale storage connected to the 400kV network
• Strengthens stability and flexibility by integrating BESS infrastructure
• Demonstrates DACI capability across EHV earthing, bonding and plant interfaces
• Captures reusable methods for future BESS and harmonic filter schemes
• Builds confidence in complex transmission-connected storage delivery

Technical Expertise, Delivered.

The scheme demonstrates DACI's ability to deliver detailed earthing design for a complex BESS site with a 400kV compound and harmonic filter. The project combines design control, constructability awareness and iterative stakeholder coordination.