Projects
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National Grid, Mechanically Switching Capacitor
Morson Praxis were appointed by National Grid to upgrade the out-of-balance protection systems on their Mechanically Switching Capacitor (MSC) units across multiple substations in the Midlands and South of England.
Client Brief
Upgrading Ageing Infrastructure for Reliability
National Grid identified that many capacitor banks installed during the early 1990s were still operating with the GEC Type DTCB 11 protection relays.
With several units already failing, the risk of leaving key assets unprotected or out of service was rising.
A modern, type-registered replacement relay system was required to ensure continued reliability, compliance, and safety.
Project Overview
Surveying and Modernising MSC Systems
Morson Praxis were tasked with surveying substations, assessing the extent of new design and installation works, and delivering a fully compliant protection solution in line with UKBP/TP 183 standards.
Our scope included design, manufacture, testing, and installation of 20 upgraded protection schemes across the identified sites.
Image Gallery
Modernising protection systems to power a safer, smarter energy network.
Our Solution
Design, Build, and Commissioning Excellence
All interface design work and design assurance were delivered in-house by our dedicated Power Engineering team.
Each of the 20 protection panels was:
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Designed and manufactured in Morson Projects’ workshop.
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Factory Acceptance Tested (FAT) by National Grid prior to site deployment.
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Installed and commissioned by our own TP144 Site Management and TP141 Commissioning teams.
This turnkey approach ensured the highest quality, full compliance, and minimal disruption to National Grid’s operations.
Results
Modern Protection for a Reliable Power Network
The upgraded protection schemes delivered enhanced reliability, safety, and operational assurance across the substations.
By replacing ageing relays with state-of-the-art protection technology, Morson Praxis helped futureproof National Grid’s critical infrastructure and ensure consistent network performance for years to come.
