---
title: "Potteric Carr SFC and 33kv Substation Service Agreement"
ocid: "ocds-h6vhtk-06e7e2"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06e7e2"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e7e2.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e7e2.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NETWORK RAIL INFRASTRUCTURE LIMITED"
published: "2026-08-19"
---

# Potteric Carr SFC and 33kv Substation Service Agreement

Buyer: NETWORK RAIL INFRASTRUCTURE LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-06e7e2

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[Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-06e7e2.json)

## Summary

Network Rail Infrastructure Limited procured a long-term service agreement for the Potteric Carr Static Frequency Converter and 33kV substation. The requirement covers specialist service, repair and maintenance work for the converter system and associated substation assets. Delivery is in the United Kingdom, at the Potteric Carr site. The equipment is a custom-engineered Hitachi converter system, with requirements linked to its control software, telecommunications diagnostics, IGCT and transformer behaviour, remote-monitoring formats and firmware, and specific interfaces. The procurement is classified as works, with the service activity described under repair and maintenance of plant. It was a utilities procurement managed by Network Rail Infrastructure Limited, a central government public authority, with Hitachi Energy UK Limited identified as the supplier.

The procurement has been awarded through a direct award to Hitachi Energy UK Limited under a single-supplier technical-reasons justification. The award is for £3.2 million excluding VAT, or £3.84 million including VAT. The contract period is 14 September 2026 to 13 September 2031, with provision for annual extensions of up to three additional years. One lot was used and is complete. The stated rationale is that the converter is custom engineered and requires proprietary knowledge, Hitachi-specific remote-monitoring formats and firmware, and OEM-trained expertise for root-cause analysis and specialised intervention without compromising asset performance or safety. A contract signature milestone was scheduled for 31 August 2026.

This procurement demonstrates a requirement for specialist electrical infrastructure maintenance where equipment is proprietary and operationally safety-critical. Suppliers competing for comparable work with Network Rail would need demonstrable original-equipment or equivalent technical expertise in static frequency converters, 33kV substations, control software, telecommunications diagnostics, IGCT and transformer behaviour, remote monitoring, firmware and bespoke interfaces. Credible providers would also need the engineering capability to investigate root causes and carry out specialised interventions while protecting asset performance and safety. The awarded supplier’s position indicates that deep product knowledge, trained personnel and the ability to support a long-term service arrangement are important competitive factors. Businesses with relevant original-equipment, authorised-service or highly evidenced specialist maintenance credentials may be well placed for this buyer’s future requirement.

## Notice

Provide a long term service agreement (LTSA) at the Potteric Carr Static Frequency Converter(SFC) and 33kV Substation

### Procurement Information

The Static Frequency Converter(SFC) is a custom engineered Hitachi converter system, requiring proprietary knowledge of control software, telecoms diagnostics, IGCT/transformer behaviour, and specific interfaces. Remote monitoring connection requirements depend on Hitachi provided formats and firmware. The OEM trained provider can perform root cause analysis and specialised intervention without compromising asset performance or safety.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/079122-2026 |
| Notice type | UK5 - Transparency Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 19 Aug 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 19 Aug 2026 |
| Contract period | 14 Sep 2026 - 13 Sep 2031 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £3,200,000 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Pending |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NETWORK RAIL INFRASTRUCTURE LIMITED |
| Locality | LONDON |
| Postcode area | South East London |
| Postcode | SE1 8SW |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI4 Inner London - East |
| ITL 3 | TLI45 Lambeth |
| Local authority | Lambeth |
| Electoral ward | Waterloo & South Bank |
| Westminster constituency | Vauxhall and Camberwell Green |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | Hitachi Energy UK Limited |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45259000 - Repair and maintenance of plant

## Release History

- 19 Aug 2026 at 15:39 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/079122-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/079122-2026
  19th August 2026 - Transparency notice on Find a Tender

## Notice URLs

- http://www.hitachienergy.com
- https://www.legislation.gov.uk/ukpga/2023/54/contents
- https://www.networkrail.co.uk/

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06e7e2. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06e7e2.json.