Medium Power Transformers
Up to 150 MVA — every power transformer is custom-designed to your system requirements, type-tested to IEC 60076 or ANSI/IEEE C57, and backed by KEMA-certified short-circuit withstand capability.
Engineering Features
KEMA Short-Circuit Testing
KEMA-witnessed short-circuit withstand testing for proven reliability under fault conditions.
Technical Data
| Parameter | Range / Value |
|---|---|
| Rated Power | Up to 150 MVA |
| Primary Voltage | Up to 220 kV |
| Secondary Voltage | 6.6 – 36 kV |
| Frequency | 50 / 60 Hz |
| Impedance | 8% – 14% (customizable) |
| Vector Group | As per specification |
| Noise Level | ≤ 70 dB(A) at 1m |
| Total Losses | Per IEC/IEEE guaranteed values |
| Temperature Rise | Top oil ≤ 60K, Winding ≤ 65K |
| Insulation Level | Full BIL / SIL as per class |
Standard range parameters — custom specifications available on request.
Related glossary terms
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
IEEE C57.12.00 / ANSI C57 compliant medium power transformers for North American transmission and sub-transmission service. From 5 MVA through 150 MVA at 69 kV, 138 kV, 161 kV and 230 kV, every unit is DOE 2016 efficient, KEMA short-circuit certified and seismic-qualified. We support investor-owned utilities, Independent Power Producers, NRECA G&T co-operatives and hyperscale data-centre operators from our Gaithersburg, Maryland office.
East-Coast IOU Sub-Transmission · 69/138 kV
ERCOT & PJM Generator Step-Up · IPP Wind & Solar
Hyperscale Data-Centre Bulk Power · Northern Virginia
NRECA G&T Co-operatives · Midwest Transmission
Industrial Power Plants · Refining & Petrochemical
Public-Power Authorities · TVA, BPA Service
Where Medium Power Transformers Excel.
ERCOT, PJM & MISO Substations
IEEE C57.12 sub-transmission transformers for ERCOT, PJM, MISO and SPP substation upgrades and capacity expansion.
Combined-Cycle GSU Duty
ANSI/IEEE generator step-up transformers for combined-cycle gas plants and peaking facilities across the US.
Utility-Scale Renewables (US)
IEEE C57.159 collector and grid-tie transformers for utility-scale solar, wind and BESS interconnections.
Hyperscale Data Centre Primary Feeds
138 kV / 69 kV primary feed transformers for hyperscale data-centre campuses requiring redundant utility supply.
Frequently Asked Questions
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Related Knowledge
FAQs, glossary terms and sizing steps mapped to this product.
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