FROM CONCEPT

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TO CONNECTION

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Value: Multi Million
Voltage: 132kV
Duration: 36 months

132kV Data Centre Connection

The client required the delivery of a 6.5km civil infrastructure route, primarily within public highways, as part of a 60MVA 132kV Data Centre connection in Hemel Hempstead, Hertfordshire.

THE CHALLENGES

Construction couldn’t be completed in one phase due to early commissioning requirements, so works were staggered and required complex sequencing from temporary to permanent systems. The project involved specialist 132kV equipment and precise coordination with existing infrastructure, alongside significant site constraints including water ingress, depth limits, pipeline crossings, and a congested industrial route.

WHAT WE DELIVERED

  • JSM constructed a dedicated 11kV substation, a 132kV dual transformer bund area, and an iDNO-adoptable 132kV switchgear compound
  • Temporary power was required during substation works, resulting in 1.6km of 11kV cables being installed. This prevented delays to the client’s energisation requirements
  • The Special Engineering Difficulties included bypassing a bridge. Horizontal Directional Drilling (HDD) was used to ensure no disruption to traffic

6.5km

CIVIL INFRASTRUCTURE ROUTE

132kV

DATA CENTRE CONNECTION

60

MVA

specialisms used

  • Principal Designer
  • Principal Contractor
  • Project management
  • Cables and Duct installation
  • HV/EHV Plant installation
  • Comissioning
  • On Load testing/Energisation
“Delivering this project required exceptional coordination and adaptability from our team. From phased construction and complex sequencing to navigating challenging ground conditions and critical infrastructure crossings, we worked closely with all stakeholders to safely deliver a resilient, high-capacity connection within demanding time constraints. “
Martyn Crocker
Operations Director