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.
IEEE C57.12
ANSI/IEEE distribution transformer standard
ANSI C57.12.00
General requirements liquid-immersed
DOE 2016
US Department of Energy efficiency rule
NEMA TR1
Sound level & loss tolerances
UL Listed
Underwriters Laboratories safety mark
IEEE C57.110
Harmonic-loaded transformer rating
Zigzag and Y-delta grounding transformers for North American utility, industrial and renewable service. 50 kVA to 5 MVA at up to 35 kV per IEEE C57.32 — providing artificial neutrals on ungrounded delta or IT systems and supporting NGR / NGR-bank fault-current limitation. Used at IPP solar and wind plants, industrial process facilities and US utility distribution.
ERCOT Solar & Wind IPP Grounding
US Industrial Process Plants · IT System Earthing
Hyperscale Data-Centre Grounding Transformers
Petrochemical & Refining Plant Grounding
Federal & DOE Site Grounding
BESS Plant Neutral-Grounding · USA
Where Earthing (Grounding) Transformers Excel.
ERCOT Solar & Wind IPP Grounding
IEEE C57.32 zigzag grounding transformers for Texas and US renewable IPP collection-substation neutral-grounding.
Hyperscale Data-Centre Grounding
Y-delta grounding transformers for US hyperscale data-centre MV systems requiring artificial neutral and NGR fault-current limitation.
Petrochemical & Refining Plants
Grounding transformers for Gulf-Coast refining and petrochemical plants — IT-system neutral-grounding and NGR support.
BESS Plant Neutral-Grounding USA
Zigzag grounding transformers for US grid-scale BESS sites — IEEE C57.32 designed for cyclic bidirectional service.
Frequently Asked Questions
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