---
title: "UKRI-6064 ISP-1157 Replacement of Large ISIS Power Supply System"
ocid: "ocds-h6vhtk-06b5f2"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06b5f2"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06b5f2.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06b5f2.json"
source: "Find A Tender Service"
current_stage: "Planning"
buyer: "UK RESEARCH & INNOVATION (UKRI)"
published: "2026-06-16"
---

# UKRI-6064 ISP-1157 Replacement of Large ISIS Power Supply System

Buyer: UK RESEARCH & INNOVATION (UKRI)  
Current stage: Planning  
OCID: ocds-h6vhtk-06b5f2

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## Summary

UK Research & Innovation (UKRI) is currently in the planning stage of a procurement process, seeking suppliers for the replacement of a large power supply system for the ISIS Neutron and Muon Source Facility in Swindon, Wiltshire, United Kingdom. The contract, identified as UKRI-6064, involves the provision of a modular three-phase AC Magnet Power Supply System. The procurement falls under the electricity and electronic supplies industry categories and has a planned contract period from 16th December 2026 to 16th December 2028. Interested suppliers are encouraged to participate in a virtual Market Engagement Event scheduled for 9th July 2026, with registration open until 6th July 2026. The procurement is estimated to be valued at £3,000,000, with a gross amount of £3,600,000.

This tender represents a significant opportunity for businesses involved in electrical and electronic systems, particularly those specialising in modular power supply systems and control systems design. The requirement for a high level of stability and precision in regulating magnet load currents suggests that companies with expertise in high-efficiency, reliable power solutions would be well-suited to compete. Furthermore, SMEs are invited to participate, making this an excellent growth opportunity for smaller enterprises to engage in a high-profile government project while expanding their reach and demonstrating their capabilities in the public sector. The procurement process presents a chance for suppliers to strengthen their credentials and secure a prestigious contract with a central government public authority.

## Notice

The ISIS Neutron and Muon Source Facility, part of UKRI's Science and Technology Facilities Council, are looking to procure a replacement three-phase Alternating Current (AC) Magnet Power Supply System to make up the losses in a resonant magnet circuit. The requirement is for a modular 1200 kVA three-phase AC voltage source power supply that includes a control system capable of regulating the designated magnet load current to a given setpoint and to a high level of stability. It is important to emphasise that the magnet load current to be regulated is not the same as the AC power supply output current and the measurement signal for the load current will be provided by the facility in the form of a DCCT with a -10/+10 V signal representative of the load circuit current. The three-phase output shall have a variable voltage output from 0 V to 250 V line-neutral and an output voltage accuracy of +-50 mV. The system shall be fed from a nominal 400 Vrms AC, 3-phase 50 Hz sinusoidal supply, intrinsically safe by design, with high efficiency, high reliability, high maintainability and fully compliant and marked with relevant standards.

### Planning Information

UKRI will be holding a virtual Market Engagement Event on Thursday 9 July 2026 at 13:30 BST, providing an overview of the requirement. There will be an opportunity for suppliers to ask questions. 
If you are interested in attending, please email the below details to 
STFCprocurement@ukri.org, quoting the UKRI reference number (UKRI-6064) by Monday 6th July 2026.
Company name:
Attendee name:
Email address:

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/056648-2026 |
| Notice type | UK2 - Preliminary Market Engagement Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Planning |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 16 Jun 2026 |
| Submission deadline | Not specified |
| Future notice date | 31 Jul 2026 |
| Award date | Not specified |
| Contract period | 16 Dec 2026 - 16 Dec 2028 |
| Recurrence | Not specified |

## Values

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

## Status

| Field | Value |
| --- | --- |
| Tender status | Planning |
| Lots status | Planning |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | UK RESEARCH & INNOVATION (UKRI) |
| Locality | SWINDON, WILTSHIRE |
| Post town | Swindon |
| Postcode | SN2 1FL |
| Country | England |
| ITL 1 | TLK South West (England) |
| ITL 2 | TLK7 Gloucestershire and Wiltshire |
| ITL 3 | TLK71 Swindon |
| Local authority | Swindon |
| Electoral ward | Rodbourne Cheney |
| Westminster constituency | Swindon North |
| Delivery location | TLJ14 Oxfordshire CC |

## CPV Codes

### Divisions

- 31 - Electrical machinery, apparatus, equipment and consumables; lighting

### Codes

- 31682000 - Electricity supplies
- 31700000 - Electronic, electromechanical and electrotechnical supplies

## Release History

- 16 Jun 2026 at 12:44 - Planning - UK2 - Preliminary Market Engagement Notice - https://www.find-tender.service.gov.uk/Notice/056648-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/056648-2026
  16th June 2026 - Preliminary market engagement notice on Find a Tender

## Notice URLs

- https://www.legislation.gov.uk/ukpga/2023/54/contents
- https://www.ukri.org/

## 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-06b5f2. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06b5f2.json.