12, 18 & 24 Pulse Rectifier Transformers
Multi-pulse rectifier transformers engineered for high-current DC conversion — 12, 18, and 24 pulse configurations that minimise harmonic distortion and maximise process efficiency for electrochemical, smelting, and heavy industrial applications.
Engineering Features
Multi-Pulse Phase-Shifting Windings
12, 18, or 24-pulse phase-shifting secondaries cancel low-order harmonics at the source — eliminates need for downstream filters.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 1 – 80 MVA |
| Primary Voltage | Up to 36 kV |
| Secondary Voltage | Project-specific (typ. 200–1500 V DC) |
| Frequency | 50 / 60 Hz |
| Pulse Configuration | 12 / 18 / 24 pulse |
| Winding Geometry | Extended Delta / Polygon |
| K-Factor Rating | K-13 to K-30 |
| Cooling | OFAF / OFWF / ODAF |
| Partial Discharge | ≤ 10 pC at 1.5 × Um |
| Standards | IEC 61378 / IEEE C57.18.10 |
Standard range parameters — custom specifications available on request.
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
KEMA Certified
Independent short-circuit witness testing
EcoDesign Tier 2
EU 548/2014 efficiency compliance
Rectifier transformers for UK industrial DC and traction service — electrolysis, smelting, electroplating, DC drives and rail traction. 500 kVA to 50 MVA at up to 132 kV per BS EN 60146 / IEC 60146, with 12-, 18- and 24-pulse configurations to minimise harmonic distortion and meet G5/4 grid-code limits. Standard supplier for UK rail traction substations and industrial process power.
Network Rail DC Traction Substations · UK
London Underground Traction Rectifier Service
UK Industrial DC Drives · Steel & Aluminium
Electrochemical Process Plants · UK
Data-Centre HVDC Power Distribution
Hydrogen Electrolysis Pilot Plants · UK
Where 12, 18 & 24 Pulse Rectifier Transformers Excel.
Network Rail DC Traction
Multi-pulse rectifier transformers for UK Network Rail and London Underground DC traction substations — 12/18/24 pulse for low harmonic distortion.
UK Industrial DC Drives
BS EN 60146 rectifier transformers for UK steel, aluminium and heavy-industry DC drives — designed for cyclic and high-current service.
Electrochemical Process Plants
12/18/24-pulse rectifier transformers for UK chlor-alkali, electroplating and electrochemical industrial processes.
Hydrogen Electrolysis Pilot Plants
Rectifier transformers for UK hydrogen-electrolyser pilot plants — bidirectional and harmonic-tolerant for green-hydrogen projects.
Frequently Asked Questions
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