Cast Resin Dry Type Transformers
Epoxy vacuum-cast resin transformers with F1 moisture class and C2 climate classification. Designed for environments where oil-free operation is critical — hospitals, data centres, marine, metro systems, and high-rise buildings.
Engineering Features
Zero Oil Design
Eliminates fire and environmental contamination risk — no oil containment needed.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 100 kVA – 25 MVA |
| Primary Voltage | 6.6 – 36 kV |
| Secondary Voltage | 230/400 V – 690 V |
| Frequency | 50 / 60 Hz |
| Impedance | 4% – 6% |
| Insulation Class | F (155°C) |
| Partial Discharge | < 10 pC at 1.6 × Un |
| Noise Level | ≤ 55 dB(A) |
| Overload (AF) | +40% with forced cooling |
| Enclosure | IP00 to IP54 |
Standard range parameters — custom specifications available on request.
Related glossary terms
ENATS 35-1
DNO-approved distribution transformer specification
ENATS 35-2
UK secondary substation transformer standard
G99 Compliant
Engineering Recommendation G99 grid interface
BS EN 60076
British Standard for power transformers
EcoDesign Tier 2
EU 548/2014 efficiency compliance
Cast-resin dry-type transformers engineered for UK indoor and oil-free environments — data centres, hospitals, high-rise residential and underground stations. Up to 25 MVA at 36 kV with F1 fire-resistance, C2 climatic and E2 environmental classification per BS EN 60076-11. Aluminium or copper foil windings, IP31 / IP54 enclosures and partial-discharge tested below 10 pC.
Where Cast Resin Dry Type Transformers Excel.
UK Hospitals & NHS Estate
F1 fire-class cast resin transformers for NHS hospitals, healthcare campuses and life-science facilities across the UK.
London & Manchester Data Centres
Zero-oil cast resin transformers for Tier III/IV data-centre campuses across Slough, Docklands, Manchester and Cardiff.
UK Rail & Underground
Cast resin transformers for London Underground, Crossrail/Elizabeth Line, HS2 and Network Rail station infrastructure.
UK High-Rise & Mixed-Use
F1-rated dry-type transformers for City of London skyscrapers, Battersea, Stratford and major mixed-use schemes.
Frequently Asked Questions
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Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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