Tapchanger Maintenance
Expertise and support for over 70% of the UK's installed base of legacy transformer on-load tapchangers, including OEM spares, kits, repairs, troubleshooting and refurbishment to keep your assets available.
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Trusted by network operators and infrastructure providers globally
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Fundamentals, part of EA Technology, brings decades of tapchanger engineering experience. Our Oldham team holds a treasure house of OEM parts, drawings and know-how, giving you unrivalled support for the most widely used legacy tapchangers from Ferranti, GE and other manufacturers.
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The range we support
We support the most widely used legacy on-load tapchangers in the UK, including the full Ferranti range:
DS2, DS5, DS300, DS400, DS500, ES3 and ES3-19
EC4, EC6, FC4, FC6, GC6, GC12, HR6, HR12, HD12 and HD14
FL6 and FL12
DC3, ST and Rotary
We also support legacy tapchangers from AEI, BTH, English Electric, GEC, Hackbridge & Hewittic, Metropolitan Vickers and other manufacturers.
How we support your tapchangers
Everything you need to keep legacy on-load tapchangers in service, from OEM parts to full refurbishment.
A vast range of in-stock OEM parts, with next day delivery UK-wide, or same day where possible.
Our Maintenance Kit Management Scheme guarantees subscribers are supplied with, and pay for, only the OEM parts they need.
A next day service across the UK and, where necessary, a same day service.
A comprehensive library of Transmission Design Circulars (TDCs), original drawings, and service and maintenance documentation.
Plug-and-play upgrades for most standard drive plates, plus add-on sensors and communications to integrate legacy units with management systems.
Fully refurbished tapchangers supplied on an exchange basis, or refurbished on site. Both are guaranteed for 5 years.
We assess the reverse power capability of many legacy tapchangers to support new generation connections.
Experienced tapchanger engineers deliver on-site and in-factory support, training, maintenance, servicing, troubleshooting and a breakdown and repair service.
Keeping legacy assets in service
OEM parts, engineering knowledge and refurbishment that keep legacy tapchangers operating reliably.
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