# Axle Counter Power Supply Unit Design

> A sourced UK public sector contract award published by TRANSPORT FOR LONDON.

## Key facts

- Buyer: [TRANSPORT FOR LONDON](/buyers/transport-for-london/contract-awards)
- Supplier: [Ramboll UK Limited](/suppliers/ramboll-uk/public-sector-contract-awards)
- Award value: £133,104
- Tender value: £146,414
- Award date: 1 April 2026
- Published: 30 April 2026
- Contract start: 4 May 2026
- Contract end: 3 November 2026
- Stage: awarded
- Procurement category: services
- Notice ID: 3badddfa-d15f-4106-9e10-72dc2d150414-895531
- OCID: ocds-b5fd17-001cf81b-5232-4d78-a0c7-4b8ab05f7658

## Description

The scope involves the renewal and replacement of existing 48V DC signalling Power Supply Units \(PSUs\), with modern Network Rail-approved equivalents\. A total of 16 PSUs are to be replaced across seven locations\. These units provide essential power to axle counter evaluators controlling Up and Down lines\. The works are intended to ensure the continued reliability, safety, and resilience of the signalling system in line with the Windrush Line core renewal strategy\.

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## Source

[View the original notice on Contracts Finder](https://www.contractsfinder.service.gov.uk/Notice/3badddfa-d15f-4106-9e10-72dc2d150414-895531)