Earthing (Grounding) Transformers
Earthing transformers providing an artificial neutral point for unearthed or delta-connected MV systems — enabling reliable ground-fault detection, controlled fault clearance, and protection coordination in industrial and renewable networks.
Engineering Features
Zigzag or Star-Delta Winding
Standard zigzag configuration for compact footprint, or star-delta with separate auxiliary winding when station service is required.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | 50 kVA – 5 MVA (continuous equivalent) |
| System Voltage | Up to 36 kV |
| Frequency | 50 / 60 Hz |
| Winding Type | Zigzag (Z) / Star-Delta (YNd) |
| Short-Time Current | Project-specific (typ. 400–4000 A for 10 s) |
| Cooling | ONAN / KNAN |
| Insulation Class | BIL 75 / 125 / 170 kV per voltage class |
| Auxiliary Winding | Optional 230/400 V |
| Standards | IEC 60076-6 / IEEE C57.32 / IEEE C62.92 |
| Design Life | 30+ years |
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
Zigzag and star-delta earthing (grounding) transformers for UK utility, industrial and renewable service. 50 kVA to 5 MVA at up to 36 kV per BS EN 60076-6, providing an artificial neutral on ungrounded delta or IT systems. Used with neutral-earthing resistors (NER) and reactors for fault-current limitation in DNO secondary distribution, renewable plants and industrial process power.
UK Renewable IPP Earthing · Solar & Wind Farms
UK DNO Distribution Network Neutral Grounding
Industrial Process Plants · Earthing for IT Systems
Network Rail Traction Substation Earthing
BESS Site Neutral-Grounding Transformers
UK Petrochemical & Process Plants · Earthing Service
Where Earthing (Grounding) Transformers Excel.
UK Renewable IPP Earthing
Zigzag earthing transformers providing artificial neutral on UK solar and wind farm collection systems for G99 grid-code compliance.
DNO Distribution Network Grounding
BS EN 60076-6 zigzag transformers for UKPN, NIE, SP Energy and Northern Powergrid neutral-grounding on ungrounded delta systems.
Industrial IT-System Earthing
Star-delta earthing transformers for UK industrial process plants requiring artificial neutral on IT or ungrounded systems.
BESS Site Neutral-Grounding
Earthing transformers for UK Battery Energy Storage System sites — paired with NER for fault-current limitation and grid compliance.
Frequently Asked Questions
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