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Transformer Mounted RMU Replacement


Date of Project: June 2026 Location: Northampton

About This Project

Installation of replacement transformer mounted RMU.

What We Did

Overview

Our client required the replacement of an ageing transformer-mounted Ring Main Unit (RMU) to ensure the continued reliability, safety, and performance of their electrical distribution network. Following a site assessment and quotation request, we supplied and installed a replacement RN2d-T2-S-21 transformer-mounted RMU, delivering a modern and dependable solution with minimal disruption to operations.

Objectives

  • Replace the existing transformer-mounted RMU with a modern equivalent.
  • Improve network reliability and operational safety.
  • Minimise downtime and disruption to the client's electrical supply.
  • Ensure compliance with current industry standards and utility requirements.
  • Provide a future-proof solution capable of supporting ongoing site operations.

Work Completed

Our engineers managed the project from supply through to final commissioning, undertaking the following works:

  • Supply of a new RN2d-T2-S-21 transformer mounted RMU
  • Safe isolation and removal of the existing RMU equipment.
  • Installation and mechanical mounting of the replacement unit.
  • Connection of incoming and outgoing high-voltage cables.
  • Electrical testing and inspection of all connections and protection systems.
  • Commissioning and operational verification of the new RMU.
  • Completion of all relevant certification and handover documentation.

Outcome

The replacement RMU was successfully installed, tested, and commissioned, restoring the site's network infrastructure with a modern, reliable solution. The project was delivered safely and efficiently, with minimal impact on the client's daily operations.

The new equipment provides improved operational performance and increased confidence in the site's electrical distribution system.

Customer Benefits

Enhanced Reliability

The new RMU reduces the risk of equipment failure and unplanned outages, improving the overall resilience of the electrical network.

Improved Safety

Modern switchgear technology provides safer operation and enhanced protection for personnel and equipment.

Reduced Maintenance Requirements

The replacement unit offers improved long-term performance and requires less maintenance compared to ageing infrastructure.

Future-Proof Infrastructure

The installation provides a dependable solution designed to support the client's operational requirements well into the future.

Minimal Operational Disruption

Careful planning and execution ensured that the replacement was completed efficiently, reducing downtime and maintaining business continuity.


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