UK DNO & Distribution Networks
Transformer manufacturer for UK distribution network operators. Distribution and power transformers built to ENA TS 35-1, 35-2 and 35-6 specification, BS EN 60076 type-tested and EU EcoDesign Tier 2 compliant.
ETS is an approved transformer supplier to all major UK Distribution Network Operators — UK DNOs. Our ENA TS 35-1 distribution transformers, ENA TS 35-2 ground-mounted package substations and ENA TS 35-6 power transformers are BS EN 60076 type-tested, EcoDesign Tier 2 compliant and engineered for DNO service. Delivered across England, Scotland, Wales and Northern Ireland.
The Challenge
UK DNOs operate under stringent ENA TS specifications, EU EcoDesign Tier 2 loss requirements and BS EN standards. Transformers must perform in varied climatic conditions — from Scottish Highlands to coastal installations — while meeting exacting factory acceptance test protocols.
Our Solution
Our transformers are designed and manufactured to ENA TS 35-1, 35-2 and 35-6 specifications as standard. Every unit undergoes witnessed factory acceptance testing per DNO protocols.
ENA TS Compliant. BS EN Type-Tested. DNO-Grade.
ENATS-compliant range aligned to UK DNO frameworks including UKPN, NIE Networks, Scottish Power and SSE
Full ENA TS 35-1, 35-2, and 35-6 compliance as standard design
EU EcoDesign Tier 2 loss performance — exceeding minimum requirements
Direct UK manufacturer team for local support and coordination
ENA TS 35-1 Distribution Transformer Programme
Ground-mounted distribution transformers built to ENA TS 35-1 specification with witnessed FAT and EU EcoDesign Tier 2 compliance.
Where We Exceed the Standard
Our engineering team doesn't design to minimum specifications. Every parameter is pushed beyond industry norms — because your operations demand it.
Loss Performance
Our distribution transformers exceed EU EcoDesign Tier 2 requirements using Hi-B laser-scribed core steel, delivering measurable lifecycle cost savings for DNO fleets.
Standards Compliance
Full compliance with ENA TS distribution transformer specifications — the UK DNO industry standard that goes beyond generic IEC requirements with additional quality and performance criteria.
Supplier Qualification
Engineered and tested to UK distribution network operator specifications aligned to frameworks operated by UKPN, NIE Networks, Scottish Power and SSE — demonstrating manufacturing capability, quality systems and supply-chain resilience.
Transformers for UK Networks, Renewables and Critical Power
A complete UK-ready transformer portfolio — from DNO distribution units through transmission-class EHV, with renewables-duty and dry-type ranges for data centres, EV hubs and urban substations.
| Product Family | Voltage Range | Key Features |
|---|---|---|
| Distribution Transformers | up to 33 kV | ENA TS-compliant, oil-immersed, ONAN/ONAF cooling, for DNO network supply. |
| Power Transformers | up to 72 kV | Utility-grade, optimised for UK substation footprints, low-loss amorphous or CRGO cores. |
| EHV Transformers | up to 400 kV | Transmission-level units designed to UK transmission specifications. |
| Solar PV & BESS Transformers | up to 36 kV | Cycling-duty rated, natural or synthetic ester fluid options, 40-year service life in renewables applications. |
| Cast Resin Dry-Type | up to 36 kV | Indoor / IP-rated, fire-safe — for data centres, EV charging hubs and urban substations. |
| Unit Substation Transformers | up to 33 kV | Compact integrated package, factory-assembled and tested. |
| Mobile / Emergency Substations | up to 33 kV | Road-transportable, available for emergency hire or outright sale. |
| Autotransformers & Earthing Transformers | up to 132 kV | Auxiliary network duty, fault-level reduction, neutral earthing. |
Distribution Transformers
up to 33 kVENA TS-compliant, oil-immersed, ONAN/ONAF cooling, for DNO network supply.
Power Transformers
up to 72 kVUtility-grade, optimised for UK substation footprints, low-loss amorphous or CRGO cores.
EHV Transformers
up to 400 kVTransmission-level units designed to UK transmission specifications.
Solar PV & BESS Transformers
up to 36 kVCycling-duty rated, natural or synthetic ester fluid options, 40-year service life in renewables applications.
Cast Resin Dry-Type
up to 36 kVIndoor / IP-rated, fire-safe — for data centres, EV charging hubs and urban substations.
Unit Substation Transformers
up to 33 kVCompact integrated package, factory-assembled and tested.
Mobile / Emergency Substations
up to 33 kVRoad-transportable, available for emergency hire or outright sale.
Autotransformers & Earthing Transformers
up to 132 kVAuxiliary network duty, fault-level reduction, neutral earthing.
All distribution and power ranges comply with EU Regulation 2019/1783 (Tier 2 MEPS, effective 1 July 2021), retained under UK EcoDesign post-Brexit.
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