Contact us: 01147069953 contact@gigawatt.co.uk

Hinchingbrooke
Business Park

Hinchingbrooke Business Park in Huntingdon needed modern, high-power EV charging to support growing demand from staff, visitors and fleet users. RAW Charging partnered with Gigawatt to design and deliver a turnkey EV infrastructure solution, integrating new rapid DC chargers with the existing UK Power Networks (UKPN) substation on site.

In just over a month, Gigawatt completed a full Turnkey + ICP project, from civils and ducting through to electrical installation, grid connection and commissioning, delivering three 150 kW DC chargers and one 50 kW DC charger with a dedicated 476 kVA low-voltage supply.

Scope of Work

High‑Power DC Charger Installation:

We installed three 150 kW DC chargers and one 50 kW DC charger at Hinchingbrooke Business Park, creating a high‑power hub for rapid charging.

Electrical Systems Setup:

We coordinated a 476 kVA, 3‑phase LV supply from the existing UKPN substation and connected it via CT‑metered kiosks, routing new LV cabling through underground ducts to each charger.

Civil Engineering Works:

We carried out excavation, trenching and duct installation between the substation, kiosks and charger locations, with runs typically between 15 m and 26 m, then reinstated the surfaces to business‑park standards.
Infrastructure Integration:

We configured protection and distribution within the customer kiosks to interface safely with the UKPN network and support sustained high‑power DC operation.
Testing, Commissioning and Handover:

We completed testing and commissioning of the chargers and LV network, documented the installation and handed over a fully operational scheme to RAW Charging.

Key Features

End-to-end delivery - Turnkey + ICP scope covering civils, electrical installation, grid connection, testing and commissioning.

High-power charging hub - Three 150 kW DC chargers plus one 50 kW DC charger, designed to support rapid turnaround for multiple vehicles.

Right-sized grid connection - Dedicated 476 kVA, 3‑phase LV supply from the existing UKPN substation, configured specifically for high-power DC charging.

Tight, well-managed programme - Overall delivery within a four-week window, with electrical works completed in a focused five-day on-site period.

Business-park friendly delivery - Works planned around a live commercial environment, minimising disruption to tenants and visitors.

Controlled commercial setup - Budget tracked from the outset, with clear split between onsite and offsite works, dedicated PO, and linked financial records.

Outcomes

The Hinchingbrooke Business Park project delivered a high‑power, future‑ready EV charging hub that meets RAW Charging’s performance and reliability goals while minimising disruption to a busy commercial site. By integrating a dedicated 476 kVA LV supply with three 150 kW DC chargers and one 50 kW DC charger, supported by robust civils, protection and monitoring, Gigawatt has created a scalable platform that improves the park’s sustainability credentials, enhances the experience for drivers, and provides RAW Charging with a repeatable blueprint for similar turnkey deployments across its network.

Charger Specifications

Supply Capacity: A 476 kVA, 3‑phase, 400 V low‑voltage supply from the existing UKPN substation, sized to support three 150 kW DC chargers and one 50 kW DC charger operating at high utilisation.

Substation Interface & Metering: Two CT‑metered terminations feed customer kiosks at the substation boundary, providing accurate energy metering and a clear demarcation between DNO and customer assets.

LV Distribution: From the kiosks, LV feeders run through underground ducts to each charger location, with cable routes designed for efficient installation, protection and future maintainability.

Protection & Safety: Protective devices within the kiosks and distribution ensure safe fault clearance, discrimination with UKPN equipment, and compliance with relevant electrical standards for high‑power DC systems.

Monitoring & Future Expansion: The metered LV backbone and ducted routes give RAW Charging clear visibility of energy use today and a scalable platform for adding or upgrading chargers in future with minimal additional civil works.

Electrical Infrastructure

EV Charger Feeds: 3 × 150 kW EV charge points are each supplied via 70 mm² 4‑core cable with 35 mm² earth, and 1 × 50 kW EV charge point is supplied via 35 mm² 4‑core cable with 16 mm² earth. This ensures low voltage drop and robust capacity for sustained high‑power charging.

CT‑Metered Distribution: One feeder pillar supplies 2 × 150 kW EVCPs on a CT‑metered 276 kVA supply, while the second feeder pillar supplies 1 × 150 kW and 1 × 50 kW EVCP on a CT‑metered 200 kVA supply. This allows accurate metering and clear separation of site load.

DNO Upgrade & Coordination: To support the additional load, UKPN upgraded a local substation feeding the site. This work required a planned shutdown, coordinated with neighbouring businesses and scheduled on a Sunday to complete the works safely while keeping operational disruption to a minimum.

Earthing Arrangement: The full installation is designed on a TT earthing system, providing a dedicated earth path and ensuring compliance with site and DNO requirements.

Circuit Protection: The 150 kW chargers are protected by 400 A MCCBs, and the 50 kW charger by a 100 A MCCB, providing appropriate overcurrent protection matched to each load.

Advanced Protection & Monitoring: The installation uses 3 × 4‑pole NSX400N and 1 × 4‑pole NSX100N MCCBs, all fitted with Micrologic 2.3 units for overload and short‑circuit protection. Additionally, Type B earth‑leakage protection is provided via CTs and a dedicated relay mounted below the NSX400N MCCBs. On detection of an earth fault, the relay operates an MX shunt trip to open the MCCB, ensuring fast, selective disconnection and enhanced safety for users and equipment.