Transformer Manufacturers

A worldwide census of transformer makers — power, distribution and dry-type/cast-resin — country by country, with locations and official links.

520Manufacturers
84Countries
10Regions

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Showing 520 makers in 84 countries

Listed public-source entry ✓ Verified company-confirmed ★ Pro Verified company documentation reviewed How verification works →

By country:

USA | Canada | Mexico | Brazil | Argentina | Colombia | Chile | Peru | Venezuela | Ecuador | Bolivia | Uruguay | Paraguay | Guatemala | Dominican Republic | United Kingdom | Ireland | France | Germany | Netherlands | Belgium | Switzerland | Austria | Italy | Spain | Portugal | Sweden | Finland | Norway | Denmark | Poland | Czechia | Slovakia | Hungary | Romania | Bulgaria | Croatia | Slovenia | Serbia | North Macedonia | Ukraine | Belarus | Russia | Türkiye | Kazakhstan | Uzbekistan | Azerbaijan | Saudi Arabia | UAE | Oman | Kuwait | Jordan | Lebanon | Iran | Iraq | Israel | Egypt | South Africa | Nigeria | Kenya | Morocco | Algeria | Tunisia | Ethiopia | Tanzania | Zimbabwe | India | Pakistan | Bangladesh | Sri Lanka | Nepal | China | Japan | South Korea | Taiwan | Thailand | Indonesia | Malaysia | Vietnam | Philippines | Singapore | Myanmar | Australia | New Zealand

North America
🇺🇸

USA

41 makers
Prolec GE (GE Vernova)PowerDistributionShreveport, LAProfile →Site →
Prolec GE WaukeshaPowerWaukesha, WIProfile →Site →
Hitachi Energy USAPowerSouth Boston, VAProfile →Site →
Siemens EnergyPowerCharlotte, NCProfile →Site →
EatonDistributionDry/CastBeaver, WVProfile →Site →
Virginia Transformer CorpPowerDistributionDry/CastRoanoke, VAProfile →Site →
Pennsylvania Transformer TechnologyPowerCanonsburg, PAProfile →Site →
Delta StarPowerDistributionLynchburg, VA + San Carlos, CAProfile →Site →
HD Hyundai Power Transformers USAPowerMontgomery, ALProfile →Site →
Mitsubishi Electric Power Products (MEPPI)PowerMemphis, TNProfile →Site →
HICO America (Hyosung)PowerMemphis, TNProfile →Site →
WEG Transformers USAPowerDistributionWashington, MOProfile →Site →
Niagara Power TransformerPowerBuffalo, NYProfile →Site →
LS Electric AmericaPowerDistributionBastrop, TXProfile →Site →
ERMCODistributionDyersburg, TNProfile →Site →
Howard Industries (Howard Power Solutions)DistributionLaurel, MSProfile →Site →
Central MoloneyDistributionPine Bluff, ARProfile →Site →
Power PartnersDistributionAthens, GAProfile →Site →
VanTran IndustriesDistributionWaco, TXProfile →Site →
Pacific Crest TransformersDistributionDry/CastMedford, ORProfile →Site →
Meta Power SolutionsPowerDistributionHouston, TXProfile →Site →
JST Power EquipmentPowerDistributionLake Mary, FLProfile →Site →
CORE TransformersPowerDistributionGreenville, SCProfile →Site →
Federal PacificDistributionDry/CastBristol, VAProfile →Site →
Maddox TransformerDistributionDry/CastGreenville, SC / Houston, TXProfile →Site →
Daelim Transformer (US)PowerDistributionCardiff, CAProfile →Site →
Hammond Power Solutions (Americas)Dry/CastBaraboo, WIProfile →Site →
MGM Transformer CompanyDry/CastCommerce, CAProfile →Site →
Olsun ElectricsDry/CastRichmond, ILProfile →Site →
ELSCO TransformersDry/CastCincinnati, OHProfile →Site →
Marcus TransformerDry/CastCharlotte, NCProfile →Site →
Jefferson Electric (Voltaris)Dry/CastWashington, MOProfile →Site →
Acme Electric (Hubbell)Dry/CastLumberton, NCProfile →Site →
Spang Power ElectronicsDry/CastSandy Lake, PAProfile →Site →
MCI Transformer CorporationDry/CastBabylon, NYProfile →Site →
Pacific Transformer CorporationDry/CastSan Diego, CAProfile →Site →
Schneider Electric / Square DDistributionDry/CastMultiple, USProfile →Site →
Sunbelt SolomonPowerDistributionTemple, TX / Solomon, KSProfile →Site →
T&R Electric SupplyPowerDistributionColman, SDProfile →Site →
Larson ElectronicsDistributionDry/CastKemp, TXProfile →Site →
R.E. Uptegraff MfgDistributionScottdale, PAProfile →
🇨🇦

Canada

9 makers
Hitachi Energy CanadaPowerVarennes, QCProfile →Site →
Delta Star CanadaPowerSaint-Jean-sur-Richelieu, QCProfile →Site →
PTI TransformersPowerDistributionRegina, SKProfile →Site →
Northern TransformerDistributionDry/CastMaple, ONProfile →Site →
Hammond Power SolutionsDry/CastGuelph, ONProfile →Site →
CES TransformersDistributionDry/CastMarkham, ONProfile →Site →
Cam Tran (Central Moloney)DistributionColborne, ONProfile →Site →
Rex Power MagneticsDry/CastConcord, ONProfile →Site →
Carte InternationalDistributionWinnipeg, MBProfile →Site →
🇲🇽

Mexico

9 makers
Prolec GEPowerDistributionApodaca, Nuevo LeónProfile →Site →
Industrias IEMPowerDistributionTlalnepantlaProfile →Site →
IMEM TransformadoresDistributionDry/CastApaseo el Grande, GuanajuatoProfile →Site →
Voltran (WEG)DistributionHuehuetocaProfile →Site →
Transformadores RTEDistributionSan Luis PotosíProfile →Site →
DEEMSAPowerDistributionEstado de MéxicoProfile →Site →
Transformadores TJDistributionEstado de MéxicoProfile →Site →
Grupo EdmarDistributionDry/CastGuadalajara, JaliscoProfile →Site →
Transformadores ZetrakDistributionDry/CastTlalnepantlaProfile →Site →
Latin America
🇧🇷

Brazil

17 makers
WEG Equipamentos ElétricosPowerDistributionDry/CastJaraguá do Sul / Blumenau, SCProfile →Site →
Hitachi Energy BrasilPowerGuarulhos, SPProfile →Site →
Siemens Energy BrasilPowerJundiaí, SPProfile →Site →
TSEA EnergiaPowerDistributionContagem, MGProfile →Site →
Prolec GE BrasilPowerDistributionCanoas, RSProfile →Site →
ComtrafoPowerDistributionJoinville, SCProfile →Site →
Romagnole Produtos ElétricosDistributionMandaguari, PRProfile →Site →
BlutrafosDistributionDry/CastBlumenau, SCProfile →Site →
Itaipu TransformadoresDistributionItápolis, SPProfile →Site →
TrafotaipuDistributionSão PauloProfile →Site →
Magnus TransformadoresDistributionDry/CastItupeva, SPProfile →Site →
RefortrafoPowerDistributionSão Carlos, SPProfile →Site →
WISE TransformadoresDistributionDry/CastJaraguá do Sul, SCProfile →Site →
ITB TransformadoresDistributionSão PauloProfile →Site →
Jund-TrafoDistributionJundiaí, SPProfile →Site →
Vale TransformadoresDistributionSão PauloProfile →Site →
Voltage TransformadoresDistributionCajamar, SPProfile →Site →
🇦🇷

Argentina

12 makers
Tadeo CzerwenyPowerDistributionVilla Gobernador Gálvez, Santa FeProfile →Site →
FaradayPowerDistributionBuenos AiresProfile →Site →
Vasile & Cía.DistributionPilar, Buenos AiresProfile →Site →
Tubos Trans Electric (TTE)DistributionBuenos AiresProfile →Site →
Transformadores MironDistributionBuenos AiresProfile →Site →
ArtransDistributionMendozaProfile →Site →
TrafomenDistributionBuenos AiresProfile →Site →
TecnoelectroDistributionBuenos AiresProfile →Site →
MF TransformadoresDistributionBuenos AiresProfile →Site →
Fohama ElectromecánicaDistributionBuenos AiresProfile →Site →
INELPA TransformadoresDistributionBuenos AiresProfile →Site →
ServelecDistributionDry/CastCórdobaProfile →Site →
🇨🇴

Colombia

7 makers
MagnetronPowerDistributionDry/CastPereiraProfile →Site →
RYMEL Ingeniería EléctricaDistributionDry/CastBogotá / CotaProfile →Site →
ANDINA T.C.DistributionBogotáProfile →Site →
Tesla TransformadoresDistributionColombiaProfile →Site →
Siemens EnergyPowerTenjoProfile →Site →
Hitachi Energy ColombiaPowerBogotáProfile →Site →
EIS EnergyDistributionColombiaProfile →Site →
🇨🇱

Chile

3 makers
Transformadores Tusan (CGE)DistributionDry/CastSantiagoProfile →Site →
RHONADistributionDry/CastViña del Mar / QuilpuéProfile →Site →
Transformadores CHPowerDistributionSantiagoProfile →Site →
🇵🇪

Peru

4 makers
DelcrosaPowerDistributionLimaProfile →Site →
EPLIDistributionLimaProfile →Site →
PromelsaDistributionLimaProfile →Site →
ManelsaDistributionLimaProfile →Site →
🇻🇪

Venezuela

3 makers
Corpoteca (TECA)DistributionVenezuelaProfile →Site →
CADETRADistributionCaracasProfile →Site →
Grupo TEMIPowerDistributionValenciaProfile →Site →
🇪🇨

Ecuador

4 makers
ECUATRANDistributionAmbatoProfile →Site →
INATRADistributionGuayaquilProfile →Site →
MoretranDistributionEcuadorProfile →Site →
RVR TransformadoresDistributionQuitoProfile →Site →
🇧🇴

Bolivia

1 maker
CDA IngenierosDistributionBoliviaProfile →Site →
🇺🇾

Uruguay

1 maker
PartiluzDistributionMontevideoProfile →Site →
🇵🇾

Paraguay

1 maker
TrafoparDistributionAsunciónProfile →Site →
🇬🇹

Guatemala

1 maker
ELECSADistributionDry/CastMixco, Guatemala CityProfile →Site →
🇩🇴

Dominican Republic

2 makers
EMTECCADistributionSanto DomingoProfile →Site →
ProminsaDistributionSanto DomingoProfile →Site →
Europe
🇬🇧

United Kingdom

6 makers
Winder PowerPowerDistributionLeedsProfile →Site →
Wilson Power SolutionsDistributionDry/CastLeedsProfile →Site →
Bowers ElectricalsDistributionDry/CastHeanorProfile →Site →
R Baker (Electrical)DistributionDry/CastLiverpoolProfile →Site →
Brush TransformersPowerLoughboroughProfile →Site →
GE Vernova (HVDC transformers)PowerStaffordProfile →Site →
🇮🇪

Ireland

2 makers
Kyte PowertechDistributionCavanProfile →Site →
GBE Engineering SystemsDistributionDry/CastDublinProfile →Site →
🇫🇷

France

5 makers
Schneider ElectricDistributionDry/CastRueil-MalmaisonProfile →Site →
France Transfo (Schneider)DistributionDry/CastMaizières-lès-MetzProfile →Site →
Green TransfoDistributionDry/CastCahorsProfile →Site →
Transfos MARYDistributionClermont-FerrandProfile →Site →
Alstom (traction transformers)PowerTarbesProfile →Site →
🇩🇪

Germany

5 makers
SGB-SMIT GroupPowerDistributionDry/CastRegensburgProfile →Site →
Siemens EnergyPowerNurembergProfile →Site →
J. Schneider ElektrotechnikDry/CastOffenburgProfile →Site →
Block Transformatoren-ElektronikDry/CastVerdenProfile →Site →
SGB (Neumark works)DistributionNeumarkProfile →Site →
🇳🇱

Netherlands

3 makers
Royal SMIT TransformersPowerNijmegenProfile →Site →
IEO TransformatorenDistributionDry/CastBredaProfile →Site →
Jaspers TransformersDistributionEijsdenProfile →Site →
🇧🇪

Belgium

1 maker
EREA Energy EngineeringDry/CastWijnegem (Antwerp)Profile →Site →
🇨🇭

Switzerland

3 makers
Hitachi Energy (global HQ)PowerDistributionDry/CastZürichProfile →Site →
Trasfor (ABB)Dry/CastLuganoProfile →Site →
Rauscher & Stoecklin (R&S Group)DistributionDry/CastSissachProfile →Site →
🇦🇹

Austria

2 makers
Siemens Energy (Transformers Weiz)PowerWeizProfile →Site →
TrafomodernDistributionDry/CastHornsteinProfile →Site →
🇮🇹

Italy

6 makers
Tamini (Terna Group)PowerLegnanoProfile →Site →
WestrafoPowerDistributionCologna VenetaProfile →Site →
Tesar (R&S Group)DistributionDry/CastSubbiano (Arezzo)Profile →Site →
Trafo ElettroDistributionDry/CastCaravaggioProfile →Site →
FDUEGPowerDistributionCarpignano Sesia (Novara)Profile →Site →
Hitachi Energy ItalyPowerMonseliceProfile →Site →
🇪🇸

Spain

4 makers
OrmazabalDistributionDry/CastIgorre (Bizkaia)Profile →Site →
TorytransDry/CastToledoProfile →Site →
IMEFYDistributionDry/CastLos Yébenes (Toledo)Profile →Site →
Hitachi Energy SpainPowerCórdobaProfile →Site →
🇵🇹

Portugal

1 maker
EfacecPowerDistributionDry/CastPortoProfile →Site →
🇸🇪

Sweden

3 makers
Hitachi EnergyPowerLudvikaProfile →Site →
NordtrafoDistributionNylandProfile →Site →
HexaformerDistributionVästervikProfile →Site →
🇫🇮

Finland

2 makers
Hitachi Energy FinlandDistributionVaasaProfile →Site →
TrafoxDistributionDry/CastHelsinkiProfile →Site →
🇳🇴

Norway

3 makers
Møre TrafoDistributionSykkylvenProfile →Site →
National Industri (Hitachi Energy)PowerDrammenProfile →Site →
NoratelDry/CastHokksundProfile →Site →
🇩🇰

Denmark

1 maker
DantrafoDistributionDry/CastLemvigProfile →Site →
🇵🇱

Poland

3 makers
ZREW Transformatory (R&S Group)PowerDistributionŁódźProfile →Site →
Fabryka Transformatorów Żychlin (FTZ)DistributionŻychlinProfile →Site →
TraftaDistributionMyszkówProfile →Site →
🇨🇿

Czechia

3 makers
ETD TransformátoryPowerDistributionPlzeňProfile →Site →
Elpro-EnergoDistributionHnojníkProfile →Site →
SGB-SMIT CzechDistributionOlomoucProfile →Site →
🇸🇰

Slovakia

1 maker
BEZ TransformátoryDistributionDry/CastBratislavaProfile →Site →
🇭🇺

Hungary

1 maker
Ganz Transformers & Electric Rotating MachinesPowerDistributionTápiószeleProfile →Site →
🇷🇴

Romania

2 makers
EnergobitDistributionCluj-NapocaProfile →Site →
DivelproDistributionBrașovProfile →Site →
🇧🇬

Bulgaria

3 makers
Elprom Heavy IndustriesPowerDistributionSofiaProfile →Site →
Elprom Trafo CHDistributionKyustendilProfile →Site →
Lemi TrafoDistributionDry/CastPernikProfile →Site →
🇭🇷

Croatia

1 maker
KONČAR Group (Power + Distribution & Special Transformers)PowerDistributionDry/CastZagrebProfile →Site →
🇸🇮

Slovenia

1 maker
Kolektor ETRAPowerLjubljanaProfile →Site →
🇷🇸

Serbia

1 maker
ABS Minel TrafoPowerDistributionMladenovacProfile →Site →
🇲🇰

North Macedonia

2 makers
EMO Ohrid (EMO Transformatori)PowerDistributionOhridProfile →Site →
Rade Končar TEPDistributionSkopjeProfile →Site →
🇺🇦

Ukraine

2 makers
Zaporozhtransformator (ZTR)PowerZaporizhzhiaProfile →Site →
VITPowerDistributionZaporizhzhiaProfile →Site →
🇧🇾

Belarus

1 maker
Minsk Electrotechnical Plant (METZ)DistributionDry/CastMinskProfile →Site →
Eurasia
🇷🇺

Russia

5 makers
Togliatti TransformatorPowerTolyattiProfile →Site →
Elektrozavod (ERSO Group)PowerDistributionMoscowProfile →Site →
SVEL GroupPowerDistributionDry/CastYekaterinburgProfile →Site →
Alttrans (Altai Transformer Plant)DistributionBarnaulProfile →Site →
Uralelectrotyazhmash (UETM)PowerYekaterinburgProfile →Site →
🇹🇷

Türkiye

35 makers
BEST TransformerPowerDistributionDry/CastBalıkesirProfile →Site →
Astor EnerjiPowerDistributionDry/CastAnkaraProfile →Site →
Mıgsan TransformatörPowerDistributionAnkaraProfile →Site →
STD TransformatörDistributionDry/CastAdanaProfile →Site →
Datsan TransformerDistributionDry/CastMardin (Kızıltepe)Profile →Site →
Eltaş TransformatörDistributionDry/Castİzmir (Aliağa)Profile →Site →
Green TransfoDistributionDry/CastKocaeli (Çayırova)Profile →Site →
Beta EnerjiDistributionDry/CastAdanaProfile →Site →
ELKİMA TrafoDistributionDry/Castİzmir (Bornova)Profile →Site →
Eren TransformatörDistributionAnkara (Sincan)Profile →Site →
Kaplan TrafoDistributionAnkaraProfile →Site →
Sönmez TrafoDistributionKocaeli (Gebze)Profile →Site →
Hitachi Energy TürkiyePowerKocaeli (Dilovası)Profile →Site →
GE Vernova (Grid Solutions)PowerKocaeli (Gebze)Profile →Site →
ABB TürkiyePowerDistributionİstanbulProfile →Site →
Ulusoy Elektrik (Eaton)Dry/CastAnkaraProfile →Site →
Meksan TrafoDistributionŞanlıurfaProfile →Site →
Maksan TransformatörDistributionKayseriProfile →Site →
Trans-El TransformatörDistributionŞanlıurfaProfile →Site →
Alfa TrafoDistributionŞanlıurfaProfile →
Elsan TransformatörDistributionŞanlıurfaProfile →Site →
Omsan TrafoDistributionAnkaraProfile →Site →
Özçelik TransformatörDistributionBursaProfile →Site →
Atlas TrafoDistributionİstanbulProfile →Site →
TEK TransformatörDistributionAnkaraProfile →Site →
Gündüz TrafoDistributionİzmirProfile →Site →
Frekans TransformatörDistributionDry/CastAnkaraProfile →Site →
Altınsoy EnerjiDistributionAnkaraProfile →Site →
ATAŞ TrafoDistributionAnkaraProfile →Site →
Ankar EnerjiDistributionAnkaraProfile →Site →
Extreme EnerjiDistributionAnkaraProfile →Site →
Sem TransformatörDistributionİstanbulProfile →Site →
Evren TrafoDistributionİzmirProfile →Site →
GETPOWER TransformerDistributionAnkaraProfile →Site →
Metsan TrafoDistributionAnkaraProfile →Site →
🇰🇿

Kazakhstan

1 maker
Alageum Electric Group (Kentau, Uralsk, Shymkent, Aktau plants)PowerDistributionDry/CastKentau / AlmatyProfile →Site →
🇺🇿

Uzbekistan

2 makers
Chirchik Transformer PlantPowerDistributionChirchikProfile →Site →
The Times Energy GroupDistributionDry/CastTashkentProfile →Site →
🇦🇿

Azerbaijan

1 maker
ATEF GroupPowerDistributionDry/CastBakuProfile →Site →
Middle East
🇸🇦

Saudi Arabia

6 makers
Electrical Industries Co. (EIC) Group — STC, SPTC, WESCOSA + Pauwels (BE)PowerDistributionDry/CastDammam (+ Mechelen, Belgium)Profile →Site →
Arabian Transformers Co. (ATC)DistributionDammamProfile →Site →
Bahra Electric / Bahra TBSDistributionDry/CastJeddahProfile →Site →
alfanarPowerDistributionDry/CastRiyadhProfile →Site →
MEMF Electrical Industries Co.PowerDistributionRiyadh Industrial City 2Profile →Site →
MATCO (Mohammed Al Ojaimi Transformers)PowerDistributionDammamProfile →Site →
🇦🇪

UAE

7 makers
Federal Transformers Co.PowerDistributionMussafah, Abu DhabiProfile →Site →
Emirates Transformer & Switchgear (ETS)PowerDistributionJebel Ali, DubaiProfile →Site →
Al Budoor TransformersDistributionDry/CastSharjahProfile →Site →
Crux TransformersPowerDistributionDry/CastAl Ghail Industrial Area, Ras Al KhaimahProfile →Site →
Global Transformers & Switchgear (GTS)PowerDistributionJebel Ali Free Zone, DubaiProfile →Site →
Beta Transformers FZCODistributionDry/CastJebel Ali Free Zone (JAFZA), DubaiProfile →Site →
Eurogulf TransformersDistributionHamriyah Free Zone, SharjahProfile →Site →
🇴🇲

Oman

4 makers
Voltamp Energy / Voltamp TransformersPowerDistributionRusayl / SoharProfile →Site →
Al Jizzi Transformers & SwitchgearsPowerDistributionMisfah / Maabela, MuscatProfile →Site →
Oman Industry Transformers & Switchgear (OITS)DistributionRusayl, MuscatProfile →Site →
Federal Transformers & Switchgears (Zubair)DistributionRusayl, MuscatProfile →Site →
🇰🇼

Kuwait

2 makers
Al-Ahleia Switchgear (Behbehani)PowerDistributionDry/CastSafat, Kuwait CityProfile →Site →
Al Nisf Electrical Co.PowerDistributionAmghara, JahraProfile →Site →
🇯🇴

Jordan

2 makers
ELICO (Matelec group)DistributionAmmanProfile →Site →
Jordan Transformer LLCPowerDistributionAmmanProfile →Site →
🇱🇧

Lebanon

1 maker
Matelec SALPowerDistributionAmchit / JbeilProfile →Site →
🇮🇷

Iran

3 makers
Iran Transfo Group (Zanjan, Rey, Zangan, Kooshkan)PowerDistributionDry/CastZanjanProfile →Site →
Niroo TransfoDistributionTehranProfile →
Kian TransfoDistributionTehranProfile →
🇮🇶

Iraq

1 maker
Diyala State Co. for Electrical IndustriesPowerDistributionBaqubahProfile →Site →
🇮🇱

Israel

2 makers
Ardan TransformersDistributionNof HaGalil (Tziporit Ind. Zone)Profile →Site →
MVA Ltd / Israel Design CenterDistributionKfar-SabaProfile →
Africa
🇪🇬

Egypt

5 makers
Elsewedy Electric (Transformers)PowerDistributionDry/CastCairoProfile →Site →
ELMACO (El Nasr Transformers)PowerDistributionCairoProfile →Site →
EGYTRAFO GroupDistributionCairoProfile →Site →
Arab Transformers Co. (ArabTrans)Distribution10th of Ramadan CityProfile →Site →
Hitachi Energy Transformers SAEPowerCairoProfile →Site →
🇿🇦

South Africa

6 makers
ACTOM Power & Distribution TransformersPowerDistributionWadeville, JohannesburgProfile →Site →
SGB-SMIT Power Matla (ex-Powertech)PowerDistributionPretoriaProfile →Site →
Transfix Transformers SADistributionBotshabeloProfile →Site →
Baynes Transformer TechnologyDistributionJohannesburgProfile →Site →
Power Transformers (Pty) LtdPowerDistributionCape TownProfile →Site →
Free State TransformersDistributionBotshabeloProfile →Site →
🇳🇬

Nigeria

2 makers
Nova Transformer ServicesPowerDistributionBwari, AbujaProfile →Site →
Elsan TransformerDistributionLagos / AbujaProfile →Site →
🇰🇪

Kenya

1 maker
Tanelec (Kenya branch)DistributionNairobiProfile →Site →
🇲🇦

Morocco

3 makers
Maroc TransfoDistributionHad SoualemProfile →
Energy TransfoDistributionCasablancaProfile →Site →
Kafeb MarocDry/CastCasablancaProfile →Site →
🇩🇿

Algeria

1 maker
Electro-Industries (ENEL — Sonelgaz group)PowerDistributionAzazga, Tizi OuzouProfile →Site →
🇹🇳

Tunisia

1 maker
SACEM IndustriesDistributionMenzel Bourguiba, BizerteProfile →Site →
🇪🇹

Ethiopia

2 makers
Abay TransformersDistributionAddis AbabaProfile →
Mesfin Industrial EngineeringDistributionMekelleProfile →Site →
🇹🇿

Tanzania

1 maker
Tanelec LtdDistributionArushaProfile →Site →
🇿🇼

Zimbabwe

1 maker
ZESA Enterprises (ZENT)PowerDistributionHarareProfile →Site →
South Asia
🇮🇳

India

98 makers
Hitachi Energy IndiaPowerDistributionDry/CastBengaluru / VadodaraProfile →Site →
CG Power & Industrial SolutionsPowerDistributionDry/CastMumbai / BhopalProfile →Site →
Transformers & Rectifiers India (TARIL)PowerDistributionAhmedabadProfile →Site →
Voltamp TransformersPowerDistributionDry/CastVadodaraProfile →Site →
BHELPowerBhopal / JhansiProfile →Site →
Siemens Energy IndiaPowerGurugram / KalwaProfile →Site →
GE Vernova T&D IndiaPowerVadodara / NoidaProfile →Site →
Kirloskar ElectricPowerDistributionBengaluruProfile →Site →
Toshiba T&D Systems IndiaPowerDistributionHyderabadProfile →Site →
Bharat BijleePowerDistributionDry/CastNavi MumbaiProfile →Site →
Indo Tech TransformersPowerDistributionDry/CastKancheepuramProfile →Site →
Schneider Electric IndiaDistributionDry/CastGurugramProfile →Site →
Shilchar TechnologiesPowerDistributionDry/CastVadodaraProfile →Site →
Atlanta ElectricalsPowerDistributionAnandProfile →Site →
KotsonsPowerDistributionAgra / AlwarProfile →Site →
Kanohar ElectricalsPowerDistributionMeerutProfile →Site →
Servokon SystemsDistributionNoidaProfile →Site →
Telawne Power EquipmentsPowerDistributionMumbaiProfile →Site →
Vijai ElectricalsDistributionHyderabadProfile →Site →
Esennar TransformersPowerDistributionHyderabadProfile →Site →
Prime MeidenPowerDistributionHyderabad / NelloreProfile →Site →
Vajra TranspowerPowerDistributionHyderabadProfile →Site →
Transcon IndustriesDistributionDry/CastHyderabadProfile →Site →
VVE TransformersDistributionHyderabadProfile →Site →
Divya Electrical TransformersDistributionHyderabadProfile →Site →
Kanyaka Power (KPEL)DistributionSangareddyProfile →Site →
Voltek TransformersDistributionHyderabadProfile →Site →
Elmag TransformersDistributionHyderabadProfile →Site →
Indpower GroupDistributionVisakhapatnamProfile →Site →
Sri Latha TransformersDistributionVisakhapatnamProfile →Site →
BSR Power ConstructionsDistributionGunturProfile →Site →
Universal Power Transformer (UPT)PowerDistributionDry/CastBengaluruProfile →Site →
Classic TransformersDistributionBengaluruProfile →Site →
Kiran Power (KPRS)DistributionBengaluruProfile →Site →
Vijay TransformersDistributionBengaluruProfile →Site →
Viji Power TransformersDistributionBengaluruProfile →
Intrans Electro ComponentsDistributionDry/CastTumkur / KochiProfile →Site →
Padmavahini TransformersDistributionDry/CastCoimbatoreProfile →Site →
Amptech Power TransformersDistributionCoimbatoreProfile →Site →
Tamilnadu ElectricalsDistributionChennaiProfile →
EVR Power SystemsPowerDistributionHyderabad / ChennaiProfile →Site →
TELK (Transformers & Electricals Kerala)PowerDistributionAngamalyProfile →Site →
KEL Transformer DivisionDistributionErnakulamProfile →Site →
Indus Transformers & DevicesDistributionThrissurProfile →Site →
Seatek TransformersDistributionErnakulamProfile →Site →
Andrew Yule & Co.DistributionKolkata / ChennaiProfile →Site →
RTS Power CorporationPowerDistributionKolkataProfile →Site →
Marsons LtdPowerDistributionKolkataProfile →Site →
EMC LimitedPowerDistributionKolkataProfile →Site →
Makpower TransformerDistributionHowrahProfile →Site →
Sandas & CoDistributionKolkataProfile →Site →
Century TransformersDistributionHowrahProfile →Site →
iPower (Arun Enterprises)DistributionHowrahProfile →Site →
Transmake ElectricalsDistributionKolkataProfile →Site →
Om Shakti TransformersDistributionKolkataProfile →Site →
IndusreeDistributionKolkataProfile →Site →
Orissa Transformers (OTPL)DistributionBhubaneswarProfile →Site →
Alfa TransformersDistributionDry/CastBhubaneswarProfile →Site →
AMCO Electrical & EngineeringDistributionKolkataProfile →Site →
Power MakerDistributionGuwahatiProfile →Site →
Prabha PowerDistributionGuwahatiProfile →Site →
RRR SPowerDistributionGuwahatiProfile →Site →
Raychem RPGPowerDistributionPune / MumbaiProfile →Site →
Pactil TransformersDistributionMumbaiProfile →Site →
Trutech ProductsDistributionDry/CastPuneProfile →Site →
MSC TransformersDistributionPuneProfile →Site →
Vishvas Power EngineeringPowerDistributionNagpurProfile →Site →
IMP PowersPowerDistributionSilvassaProfile →Site →
Electrotherm (India)PowerDistributionAhmedabadProfile →Site →
Trio TransformersDistributionAhmedabadProfile →Site →
The Transformer Company (Thetransco)PowerDistributionAnandProfile →Site →
Gujarat TransformersDistributionVadodaraProfile →Site →
Electrica Energy ProductsDistributionVadodaraProfile →Site →
Trafo Power ApparatusDistributionVadodaraProfile →Site →
Power Engineers Co.DistributionVadodaraProfile →Site →
Urja TechniquesDistributionDry/CastVadodara / MumbaiProfile →Site →
Synergy TransformersDistributionRajkotProfile →Site →
Rajkot Powertrans (RPPL)DistributionRajkotProfile →Site →
TMC Transformers IndiaDry/CastPuneProfile →Site →
Danish PowerPowerDistributionJaipurProfile →Site →
United TransformersDistributionJaipurProfile →Site →
H.D. TransformersDistributionJaipurProfile →Site →
T-Power Transformer & SwitchgearDistributionJaipurProfile →Site →
Shakti Electrical CorporationDistributionJaipurProfile →Site →
Rajasthan Transformers & SwitchgearsDistributionJaipurProfile →
Sudhir PowerDistributionGurugramProfile →Site →
GNT TransformersDistributionFaridabadProfile →Site →
Jaybee IndustriesDistributionFaridabadProfile →Site →
Aditya PowersDistributionFaridabadProfile →Site →
Macroplast TransformersDistributionGreater NoidaProfile →Site →
Savio TransformersDistributionHapurProfile →Site →
Power Tech Transformers & ElectricalsDistributionGhaziabadProfile →Site →
Tirupati TransformerDistributionGhaziabadProfile →Site →
Trishul EngineeringDistributionBulandshahrProfile →Site →
Vishal Transformers & SwitchgearsDistributionMeerutProfile →Site →
ABC TransformersDistributionFaridabad / UPProfile →Site →
East India UdyogDistributionSahibabad, UPProfile →Site →
Tesla TransformersPowerDistributionBhopalProfile →Site →
🇵🇰

Pakistan

6 makers
Siemens PakistanPowerDistributionLahoreProfile →Site →
Transfopower IndustriesPowerDistributionLahoreProfile →Site →
Pan Power InternationalDistributionLahoreProfile →Site →
Trafo LinkDistributionLahoreProfile →Site →
Albario Engineering (GRIT)DistributionLahoreProfile →Site →
PEL (Pak Elektron)DistributionLahoreProfile →Site →
🇧🇩

Bangladesh

4 makers
Energypac EngineeringPowerDistributionDhakaProfile →Site →
Bangla PowerDistributionDhakaProfile →Site →
Transpower EngineeringDistributionDhakaProfile →Site →
Powerade TechnologyDistributionDhakaProfile →Site →
🇱🇰

Sri Lanka

1 maker
LTL TransformersDistributionMoratuwa, ColomboProfile →Site →
🇳🇵

Nepal

3 makers
Nepal Ekarat Engineering Co. (NEEK)PowerDistributionHetauda / KathmanduProfile →Site →
Nepal Transformer & Allied EngineeringDistributionBhaktapurProfile →Site →
Him ElectronicsDistributionKathmanduProfile →Site →
East Asia
🇨🇳

China

47 makers
TBEA Group (Changji HQ; Shenyang, Hengyang, Tianjin plants)PowerDistributionDry/CastChangji, XinjiangProfile →Site →
China XD Group (Xi'an XD Transformer)PowerDistributionDry/CastXi'an, ShaanxiProfile →Site →
Baoding Tianwei Baobian Electric (Tianwei Group)PowerDistributionBaoding, HebeiProfile →Site →
Shandong Taikai (Taikai Group)PowerDistributionTai'an, ShandongProfile →Site →
Shandong Taishan / Luneng Mount Tai (Taishan Group)PowerDistributionDry/CastTai'an, ShandongProfile →Site →
Sieyuan Electric (incl. Changzhou Sieyuan-Toshiba)PowerDistributionDry/CastShanghai / ChangzhouProfile →Site →
Jiangsu Huapeng (JSHP, Huapeng Group)PowerDistributionDanyang, JiangsuProfile →Site →
Jiangsu Yawei TransformerPowerDistributionDry/CastJiangsuProfile →Site →
Hainan Jinpan (Jinpan Group; Guilin, Yangzhou)Dry/CastHaikou, HainanProfile →
CHINT Transformers (CHINT Group)PowerDistributionDry/CastWenzhou / WuhanProfile →Site →
Sunten ElectricDistributionDry/CastFoshan, GuangdongProfile →Site →
Daelim Belefic / Daelim TransformerPowerDistributionJiangsuProfile →Site →
Shandong Dahua (SD New Energy)DistributionDry/CastAnqiu, ShandongProfile →Site →
Qingdao Qingdian Electric GroupDistributionDry/CastQingdao, ShandongProfile →Site →
SDEE — Shandong Electrical Eng. & Equip. (State Grid)PowerDistributionJinan, ShandongProfile →Site →
Hangzhou Qiantang River Electric (QRE)PowerDistributionHangzhou, ZhejiangProfile →Site →
Zhejiang Jiangshan TransformerPowerDistributionJiangshan, ZhejiangProfile →Site →
SCOTECH (Jiangshan Scotech Electrical)PowerDistributionDry/CastJiangshan, ZhejiangProfile →Site →
Yueqing Zhongming ElectricDistributionDry/CastWenzhou, ZhejiangProfile →Site →
Guangdong Haihong TransformerDistributionDry/CastKaiping, GuangdongProfile →Site →
CRRC Yongji Electric (CRRC Group)PowerDistributionYongji, ShanxiProfile →Site →
Beijing Power Equipment Group (BPEG)PowerBeijingProfile →Site →
ZTT — Jiangsu Zhongtian (ZTT Group)DistributionDry/CastNantong, JiangsuProfile →Site →
Daqo Group (Nanjing / Zhenjiang Daqo)PowerDistributionDry/CastYangzhong, JiangsuProfile →Site →
Jinguan ElectricPowerDistributionDry/CastNanyang, HenanProfile →Site →
Jiangsu Tianwei TransformerPowerDistributionDry/CastHai'an, JiangsuProfile →Site →
Shandong Fuda TransformerPowerDistributionDry/CastLiaocheng, ShandongProfile →Site →
Wuxi Power Transformer (Beijing Shuangjie)PowerDistributionWuxi, JiangsuProfile →Site →
Shanghai Huguang TransformerDistributionDry/CastShanghaiProfile →Site →
Shanghai Electric (T&D Group)PowerDistributionDry/CastShanghaiProfile →Site →
Shenda Electric GroupPowerDistributionDry/CastWenzhou, ZhejiangProfile →Site →
Henan Pinggao Electric (State Grid)PowerPingdingshan, HenanProfile →Site →
Hebei Hongda Electric Power EquipmentDistributionDry/CastHebeiProfile →Site →
Shandong Zhifeng TransformerDistributionDry/CastLiaocheng, ShandongProfile →Site →
Zhejiang Xianghu TechnologyPowerDistributionWenzhou, ZhejiangProfile →Site →
Jiangsu Hengyi TransformerPowerDistributionDry/CastXuzhou, JiangsuProfile →Site →
China Electric Equipment Group (CEEG)PowerDistributionNanjing, JiangsuProfile →Site →
Hengfengyou Electric GroupDistributionDry/CastZhejiangProfile →Site →
Shandong Yimeng Power EquipmentDistributionLinyi, ShandongProfile →Site →
Shandong Jinshida TransformerDistributionDry/CastLiaocheng, ShandongProfile →
Zhejiang Yongbang ElectricDistributionDry/CastZhejiangProfile →Site →
Jiangsu Dingxin ElectricDistributionJiangsuProfile →Site →
Wuhan UHV Power TechnologyPowerWuhan, HubeiProfile →Site →
CNC Electric GroupDistributionDry/CastYueqing, ZhejiangProfile →Site →
Hitachi Energy (Chongqing / Shanghai)PowerDry/CastChongqing / ShanghaiProfile →Site →
Siemens Transformer (Wuhan)PowerWuhan, HubeiProfile →Site →
SGB Transformer (Changzhou)DistributionDry/CastChangzhou, JiangsuProfile →Site →
🇯🇵

Japan

9 makers
Mitsubishi ElectricPowerDry/CastTokyoProfile →Site →
Toshiba Energy SystemsPowerKawasakiProfile →Site →
Hitachi Energy JapanPowerDistributionTokyoProfile →Site →
Fuji ElectricPowerDistributionDry/CastTokyoProfile →Site →
MeidenshaPowerDistributionTokyoProfile →Site →
Kitashiba ElectricDistributionYamagataProfile →Site →
DAIHENDistributionDry/CastOsakaProfile →Site →
Takaoka TokoDistributionTokyoProfile →Site →
Togami ElectricDistributionSagaProfile →Site →
🇰🇷

South Korea

17 makers
Hyosung Heavy IndustriesPowerDistributionDry/CastChangwonProfile →Site →
HD Hyundai ElectricPowerDistributionDry/CastUlsanProfile →Site →
LS ElectricPowerDistributionDry/CastAnyangProfile →Site →
Iljin ElectricPowerDistributionHwaseongProfile →Site →
Sanil ElectricPowerDistributionDry/CastAnsanProfile →Site →
New Korea ElectricPowerDistributionGimhaeProfile →Site →
IEN Hanchang (HC Transformer)PowerDistributionBusan (Gijang)Profile →Site →
International Electric (IEC)PowerDistributionDry/CastEumseongProfile →Site →
Dongmi Electric Ind.PowerDistributionDry/CastGwangjuProfile →Site →
Samil TransformerDistributionDry/CastEumseongProfile →
Sungjin General ElectricDistributionDry/CastYonginProfile →Site →
KP ElectricPowerDistributionDry/CastGimhaeProfile →Site →
EL Power TechPowerDistributionDry/CastSouth KoreaProfile →Site →
LS Power Solution (KOC Electric)PowerDistributionDry/CastBusanProfile →Site →
Kumkang TransformerPowerDistributionSouth KoreaProfile →Site →
Yuseong K&NDry/CastSouth KoreaProfile →Site →
Jeil ElectricDistributionNajuProfile →
🇹🇼

Taiwan

5 makers
Fortune ElectricPowerDistributionDry/CastTaoyuanProfile →Site →
Shihlin Electric & EngineeringDistributionDry/CastTaipeiProfile →Site →
TECO Electric & MachineryPowerDistributionDry/CastTaipeiProfile →Site →
Allis ElectricPowerDistributionTaipeiProfile →Site →
Suenn Liang IndustrialDistributionDry/CastKaohsiungProfile →Site →
Southeast Asia
🇹🇭

Thailand

13 makers
TirathaiPowerDistributionSamut PrakanProfile →Site →
QTC EnergyPowerDistributionBangkok / Nakhon RatchasimaProfile →Site →
Ekarat EngineeringDistributionDry/CastBangkok / Nakhon RatchasimaProfile →Site →
Thai Maxwell ElectricDistributionSamut PrakanProfile →Site →
Charoenchai TransformerDistributionDry/CastRat Burana, BangkokProfile →Site →
Thai Trafo ManufacturingPowerDistributionBangkok / AyutthayaProfile →Site →
Daihen ElectricPowerDistributionChachoengsaoProfile →Site →
Sahabhant ElectricPowerDistributionBang Phli, Samut PrakanProfile →Site →
Thai Patanakit TransformerDistributionSamut PrakanProfile →Site →
S.P. Electric Industry (Fulllite)DistributionBangkokProfile →Site →
EstelDry/CastBangkokProfile →Site →
Hitachi Energy ThailandPowerSamut PrakanProfile →Site →
ABB ThailandDistributionDry/CastBang Pu, Samut PrakanProfile →Site →
🇮🇩

Indonesia

7 makers
Trafoindo Prima PerkasaPowerDistributionTangerangProfile →Site →
Bambang Djaja (B&D Transformer)PowerDistributionDry/CastSurabayaProfile →Site →
Trafindo Power IndonesiaPowerDistributionTangerangProfile →Site →
Schneider Electric Mfg BatamDistributionDry/CastBatamProfile →Site →
Unindo (Unelec Indonesia)PowerDistributionJakartaProfile →Site →
Sintra Sinarindo Elektrik (SSE)DistributionTangerangProfile →Site →
Morawa Electric TransbuanaDistributionMedanProfile →
🇲🇾

Malaysia

4 makers
Malaysia Transformer Mfg (MTM)PowerDistributionNilaiProfile →Site →
Hitachi Energy MalaysiaPowerNilaiProfile →Site →
Jasa Megah IndustriesDistributionDry/CastShah AlamProfile →Site →
Tamco Switchgear (Schneider)DistributionDry/CastKlangProfile →Site →
🇻🇳

Vietnam

14 makers
MBT Electrical EquipmentPowerDistributionDry/CastHanoiProfile →Site →
EEMC (Dong Anh Electrical Equipment)PowerDistributionDong Anh, HanoiProfile →Site →
THIBIDIDistributionBien Hoa, Dong NaiProfile →Site →
HEM (Hanoi Electro-Mechanical)PowerDistributionHanoiProfile →Site →
LIOA (Nhật Linh)DistributionHanoiProfile →Site →
EMIC (Gelex group)DistributionBac NinhProfile →Site →
Hitachi Energy VietnamPowerDistributionTien Son IZ, Bac NinhProfile →Site →
Shihlin Electric (Vietnam)DistributionDry/CastDong Nai / HCMCProfile →Site →
EMC – Thu Duc Electro-MechanicalPowerDistributionDry/CastHo Chi Minh CityProfile →Site →
BTH – Hanoi Transformer Mfg.PowerDistributionNam Tu Liem, HanoiProfile →Site →
HBT Vietnam Transformer Mfg.PowerDistributionTien Son IZ, Bac NinhProfile →
HABT Electrical Equipment & Transformer Mfg.DistributionBac NinhProfile →Site →
HAVEC – Vietnam Electrical Equipment Mfg.DistributionDry/CastNgoc Hoi IZ, HanoiProfile →Site →
CTC GroupDistributionDry/CastHanoiProfile →Site →
🇵🇭

Philippines

3 makers
Wescor TransformerDistributionQuezon CityProfile →Site →
A Plus Power SolutionDistributionMetro ManilaProfile →Site →
First Philec (Philec)DistributionDry/CastBatangasProfile →Site →
🇸🇬

Singapore

2 makers
Meiden SingaporePowerDistributionSingaporeProfile →Site →
LKH Projects DistributionDistributionDry/CastSingaporeProfile →Site →
🇲🇲

Myanmar

2 makers
Yangon Transformer & ElectricalDistributionYangonProfile →Site →
Myanmar Transformer & Switchgear (MTS)DistributionYangonProfile →
Oceania
🇦🇺

Australia

4 makers
Wilson Transformer CompanyPowerDistributionGlen Waverley / WodongaProfile →Site →
Tyree TransformersDistributionMittagong, NSWProfile →Site →
ETEL AustraliaDistributionMelbourneProfile →Site →
RLP ElectricDistributionDry/CastSydneyProfile →Site →
🇳🇿

New Zealand

3 makers
ETEL LimitedDistributionAucklandProfile →Site →
Electronic & Transformer Engineering (ETE)Dry/CastAucklandProfile →Site →
TWS Energy ControlsDistributionChristchurchProfile →

PT = Power Transformers · DT = Distribution Transformers · DRY = Dry-type / Cast Resin. Listed entries are compiled from public sources; Verified & Pro Verified entries are confirmed by the company. Verify capability before commercial decisions.

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Categories: Power · Distribution · Dry-type / Cast Resin · Bushings · Tap-Changers · Core Steel & Raw Materials · Insulation · Transformer Oil · Radiators & Fittings · Testing Equipment · Services & Repair

Global leaders — a tiered view

The strongest transformer manufacturers by tier, with indicative annual capacity and voltage capability. Figures are summary values from cited third-party research; verify capability with the manufacturer before a commercial decision.

Tier 1 Global leaders

ManufacturerCountryCapacity / yrMax voltageCertificationsRegionsSource
Hitachi Energy Switzerland ~500,000 MVA 1200 kV IEC, IEEE, UL Global Fortune Business Insights
Siemens Energy Germany ~450,000 MVA 800 kV IEC, IEEE, CE Global Fortune Business Insights
GE Vernova United States ~350,000 MVA 550 kV IEEE, IEC, UL Americas, Europe, Asia Fortune Business Insights
Schneider Electric France ~250,000 MVA 36 kV IEC, CE, UL Global Fortune Business Insights
Mitsubishi Electric Japan ~210,000 MVA 1050 kV IEC, IEEE Global Fortune Business Insights
HD Hyundai Electric South Korea ~190,000 MVA 550 kV IEC, IEEE, UL Asia, Americas, MEA Fortune Business Insights
Toshiba Energy Systems Japan ~175,000 MVA 800 kV IEC, IEEE Asia, Europe Fortune Business Insights
TBEA Co. Ltd. China ~162,000 MVA 1100 kV IEC, IEEE Asia, Global Fortune Business Insights
CG Power India ~146,000 MVA 400 kV IEC Asia, Africa, MEA Fortune Business Insights
Elsewedy Electric Egypt ~126,000 MVA 400 kV IEC, CE Africa, MEA Fortune Business Insights

Tier 2 Major regional

ManufacturerCountryCapacity / yrMax voltageCertificationsRegionsSource
SGB-SMIT Group Germany ~100,000 MVA 400 kV IEC Europe, Global DOE Study
Smit Transformers Netherlands ~80,000 MVA 800 kV IEC Europe, Americas DOE Study
EFACEC Power Solutions Portugal ~60,000 MVA 400 kV IEC Europe, Africa Industry Directory
Wilson Transformer Company Australia ~50,000 MVA 400 kV IEC Oceania, Asia Industry Directory
TMC Transformers SpA Italy ~20,000 MVA 36 kV IEC, CE Europe Ensun Directory
Specialtrasfo SpA Italy ~15,000 MVA 170 kV IEC Europe, Global Ensun Directory
Hyosung Heavy Industries South Korea ~120,000 MVA 765 kV IEC, IEEE Asia, Americas DOE Study
HICO Technology South Korea ~75,000 MVA 765 kV IEC, IEEE Korea, Americas DOE Study
China XD Group China ~150,000 MVA 1100 kV IEC Asia, Global DOE Study
JSHP Transformer (Jiangsu) China ~100,000 MVA 345 kV IEC Asia, Americas DOE Study
Transformers & Rectifiers (India) India ~50,000 MVA 400 kV IEC Asia, MEA Ensun Directory
BHEL (Bharat Heavy Electricals) India ~70,000 MVA 765 kV IEC Asia, MEA Industry Directory
Prolec GE Mexico ~100,000 MVA 550 kV IEEE, IEC Americas, Africa, MEA DOE Study
WEG Brazil ~80,000 MVA 500 kV IEEE, IEC Americas, Global Industry Directory
Hammond Power Solutions Canada ~40,000 MVA 35 kV IEEE, UL Americas Industry Directory
Virginia Transformer Corp United States ~30,000 MVA 230 kV IEEE, UL Americas Ensun Directory
VanTran Industries United States ~10,000 MVA 35 kV IEEE, UL Americas Ensun Directory

Tier 3 Specialized / custom

ManufacturerCountryCapacity / yrMax voltageCertificationsRegionsSource
Gangheng Electric China ~5,000 MVA 35 kV IEC, CE Asia Sinovoltaics Map
Altran Corporation United States ~1,000 MVA 1 kV UL Americas IQS Directory / Ensun
Custom Transformers Ltd United Kingdom ~2,000 MVA 33 kV IEC, CE Europe Ensun Directory
Emerald Transformer United States ~5,000 MVA 230 kV IEEE Americas Ensun Directory
Foster Transformer Company United States ~3,000 MVA 35 kV UL Americas IQS Directory
Jefferson Electric United States ~2,000 MVA 35 kV UL, IEEE Americas IQS Directory
Electronetics LLC United States ~500 MVA 1 kV ISO 9001 Americas IQS Directory
Bridgeport Magnetics United States ~1,000 MVA 15 kV UL Americas IQS Directory
CTM Magnetics United States ~500 MVA 1 kV UL Americas IQS Directory

Tier 1 = Global leader · Tier 2 = Major regional · Tier 3 = Specialized / custom. Compiled from Fortune Business Insights, the DOE Large Power Transformer study, industry directories and the Sinovoltaics China factory map; confirm current capability with each manufacturer.