Samil Transformer Co., Ltd. is a specialized transformer manufacturer established in 1970. The company continuously strives to produce optimal transformers by integrating innovative design and production technologies with computer science. Its product portfolio includes high-efficiency mold transformers, oil-immersed transformers, and dry-type transformers. Notably, the company develops and supplies high-value-added transformers for special purposes, such as seismic-resistant mold transformers based on proprietary patented technology and Isolation transformers for EV chargers. A core business philosophy involves ensuring product reliability with a 'ZERO Customer Complaints' quality goal.SamilTransformerCo.,Ltd.isaspecializedtransformermanufacturerestablishedin1970.Thecompanycontinuouslystrivestoproduceoptimaltransformersbyintegratinginnovativedesignandproductiontechnologieswithcomputerscience.Itsproductportfolioincludeshigh-efficiencymoldtransformers,oil-immersedtransformers,anddry-typetransformers.Notably,thecompanydevelopsandsupplieshigh-value-addedtransformersforspecialpurposes,suchasseismic-resistantmoldtransformersbasedonproprietarypatentedtechnologyandIsolationtransformersforEVchargers.Acorebusinessphilosophyinvolvesensuringproductreliabilitywitha'ZEROCustomerComplaints'qualitygoal.
Key Products/TechnologiesKeyProducts/Technologies
Minimum & Standard Efficiency Cast Resin Transformer: An indoor-type transformer with windings encapsulated in epoxy resin, characterized by excellent fire safety, environmental friendliness, and low maintenance requirements. Specifications include frequency 50Hz/60Hz, capacity up to 7,000 kVA, and rated voltage up to 22.9 kV.Minimum&StandardEfficiencyCastResinTransformer:Anindoor-typetransformerwithwindingsencapsulatedinepoxyresin,characterizedbyexcellentfiresafety,environmentalfriendliness,andlowmaintenancerequirements.Specificationsincludefrequency50Hz/60Hz,capacityupto7,000kVA,andratedvoltageupto22.9kV.
Seismic-Resistant Cast Resin Transformer: Designed to ensure stable operation and safety under seismic conditions. Features patented technology with anti-toppling stoppers and rotating plate-type vibration damping devices. Available with capacities up to 3,000 kVA and rated voltage up to 22.9 kV.Seismic-ResistantCastResinTransformer:Designedtoensurestableoperationandsafetyunderseismicconditions.Featurespatentedtechnologywithanti-topplingstoppersandrotatingplate-typevibrationdampingdevices.Availablewithcapacitiesupto3,000kVAandratedvoltageupto22.9kV.
Oil-Immersed Transformer (Pole Mounted Transformer, Pad Mounted Transformer): An oil-insulated transformer suitable for both indoor and outdoor applications, providing reliable performance, efficient heat dissipation, and a long service life. Capacities up to 3,000 kVA and rated voltage up to 22.9 kV. Offers various models for KEPCO, including low-loss, amorphous, and standard pad-mount types.Oil-ImmersedTransformer(PoleMountedTransformer,PadMountedTransformer):Anoil-insulatedtransformersuitableforbothindoorandoutdoorapplications,providingreliableperformance,efficientheatdissipation,andalongservicelife.Capacitiesupto3,000kVAandratedvoltageupto22.9kV.OffersvariousmodelsforKEPCO,includinglow-loss,amorphous,andstandardpad-mounttypes.
Power Transformer: A high-capacity transformer designed for substations, factories, and various industrial facilities. Ensures stable power transmission and reliable operation for large-scale power systems. Specifications include frequency 50Hz/60Hz, capacity up to 15,000 kVA, and rated voltage up to 22.9 kV.PowerTransformer:Ahigh-capacitytransformerdesignedforsubstations,factories,andvariousindustrialfacilities.Ensuresstablepowertransmissionandreliableoperationforlarge-scalepowersystems.Specificationsincludefrequency50Hz/60Hz,capacityupto15,000kVA,andratedvoltageupto22.9kV.
Dry Type Transformer: An environmentally friendly, safe, and reliable product, allowing for conductor recycling upon disposal and achieving miniaturization and lightweight design. Development of VPI (Vacuum Pressure Impregnation) dry-type transformers demonstrates its technological capability.DryTypeTransformer:Anenvironmentallyfriendly,safe,andreliableproduct,allowingforconductorrecyclingupondisposalandachievingminiaturizationandlightweightdesign.DevelopmentofVPI(VacuumPressureImpregnation)dry-typetransformersdemonstratesitstechnologicalcapability.
Isolation Transformer for EV Chargers: Developed and supplied for the rapidly growing electric vehicle charging infrastructure market.IsolationTransformerforEVChargers:Developedandsuppliedfortherapidlygrowingelectricvehiclecharginginfrastructuremarket.
Core AdvantagesCoreAdvantages
Over Half a Century of Specialized Transformer Manufacturing Expertise: Accumulated profound technical skills and production know-how through exclusive focus on transformer manufacturing since its establishment in 1970. A strong market presence built on over 40 years of dedicated craftsmanship.OverHalfaCenturyofSpecializedTransformerManufacturingExpertise:Accumulatedprofoundtechnicalskillsandproductionknow-howthroughexclusivefocusontransformermanufacturingsinceitsestablishmentin1970.Astrongmarketpresencebuiltonover40yearsofdedicatedcraftsmanship.
Innovative Technology Development and Patent Holdings: Possesses patented technology for seismic-resistant mold transformers, ensuring stable power supply during earthquakes, and develops Isolation transformers for EV chargers to secure future growth engines. Holds a patent registration for a transformer fault diagnosis system.InnovativeTechnologyDevelopmentandPatentHoldings:Possessespatentedtechnologyforseismic-resistantmoldtransformers,ensuringstablepowersupplyduringearthquakes,anddevelopsIsolationtransformersforEVchargerstosecurefuturegrowthengines.Holdsapatentregistrationforatransformerfaultdiagnosissystem.
Rigorous Quality Control and Reliability Assurance: Adheres to a 'ZERO Customer Complaints' quality policy and has obtained numerous quality and environmental management system certifications, including ISO 9001, 14001, and 45001. Proactive response to market demands for energy efficiency through high-efficiency energy equipment certification.RigorousQualityControlandReliabilityAssurance:Adherestoa'ZEROCustomerComplaints'qualitypolicyandhasobtainednumerousqualityandenvironmentalmanagementsystemcertifications,includingISO9001,14001,and45001.Proactiveresponsetomarketdemandsforenergyefficiencythroughhigh-efficiencyenergyequipmentcertification.
Capability to Meet Diverse Domestic and International Standards: Products are applicable under various authoritative standards, including Korean Industrial Standard (KS), International Electro-technical Commission (IEC), British Standard Institution (BSI), American National Standards Institute (ANSI), and Japanese Electrical Committee (JEC). UL certification acquisition facilitates entry into international markets.CapabilitytoMeetDiverseDomesticandInternationalStandards:Productsareapplicableundervariousauthoritativestandards,includingKoreanIndustrialStandard(KS),InternationalElectro-technicalCommission(IEC),BritishStandardInstitution(BSI),AmericanNationalStandardsInstitute(ANSI),andJapaneseElectricalCommittee(JEC).ULcertificationacquisitionfacilitatesentryintointernationalmarkets.
High Credibility in Public and Private Markets and Procurement Competitiveness: Established high market trust by supplying products to public sectors, including KEPCO, and private construction and industrial plant markets. Secured competitive advantage in the public procurement market through certifications such as Excellent Procurement Product and G-PASS.HighCredibilityinPublicandPrivateMarketsandProcurementCompetitiveness:Establishedhighmarkettrustbysupplyingproductstopublicsectors,includingKEPCO,andprivateconstructionandindustrialplantmarkets.SecuredcompetitiveadvantageinthepublicprocurementmarketthroughcertificationssuchasExcellentProcurementProductandG-PASS.
Export Competitiveness and Global Market Expansion Efforts: Recognized as a KOTRA Global Brand (2012), designated as an Export-Promising SME (2008, 2013, 2015), and received the $2 Million Export Tower Award on Trade Day (2025), demonstrating continuous efforts in overseas market development.ExportCompetitivenessandGlobalMarketExpansionEfforts:RecognizedasaKOTRAGlobalBrand(2012),designatedasanExport-PromisingSME(2008,2013,2015),andreceivedthe$2MillionExportTowerAwardonTradeDay(2025),demonstratingcontinuouseffortsinoverseasmarketdevelopment.
Target IndustrieTargetIndustrie
Power Infrastructure: Power supply systems for KEPCO and substations.PowerInfrastructure:PowersupplysystemsforKEPCOandsubstations.
Industrial Plants: Power systems for factories and various industrial facilities.IndustrialPlants:Powersystemsforfactoriesandvariousindustrialfacilities.
Construction and Building: Power supply for general buildings, including apartments, underground shopping centers, and modern structures.ConstructionandBuilding:Powersupplyforgeneralbuildings,includingapartments,undergroundshoppingcenters,andmodernstructures.
Critical Facilities: Data centers, hospitals, communication facilities, and semiconductor factories, where stable power supply is essential even during earthquakes.CriticalFacilities:Datacenters,hospitals,communicationfacilities,andsemiconductorfactories,wherestablepowersupplyisessentialevenduringearthquakes.
Renewable Energy: Power conversion and supply for renewable energy sectors, such as solar power generation facilities.RenewableEnergy:Powerconversionandsupplyforrenewableenergysectors,suchassolarpowergenerationfacilities.
Transportation Infrastructure: Power supply for public transportation systems like subways, high-speed trains, and ships.TransportationInfrastructure:Powersupplyforpublictransportationsystemslikesubways,high-speedtrains,andships.
EV Charging Infrastructure: Supply of core components for the rapidly growing electric vehicle charging infrastructure market.EVChargingInfrastructure:Supplyofcorecomponentsfortherapidlygrowingelectricvehiclecharginginfrastructuremarket.
Efforts to target the European marketEffortstotargettheEuropeanmarket
Certifications/PatentsCertifications/Patents
Patents: Patent registration for seismic-resistant mold transformers (2019, 2021). Patent registration for transformer fault diagnosis system (2003). Design registration for seismic-resistant mold transformer (2020).Patents:Patentregistrationforseismic-resistantmoldtransformers(2019,2021).Patentregistrationfortransformerfaultdiagnosissystem(2003).Designregistrationforseismic-resistantmoldtransformer(2020).
Certifications: ISO 9001, ISO 14001, ISO 45001 (Quality, Environmental, Occupational Health and Safety Management Systems). KS Product Certification. High-Efficiency Energy Equipment Certification. Disaster Safety Product Certification (Ministry of Interior and Safety). G-PASS Certification (Public Procurement Service). Excellent Procurement Product Certification (Public Procurement Service). Performance Certification (SME Administration). KTP (KEPCO Trusted Partner) Certification. INNO-BIZ (Technology Innovative SME). Venture Company Confirmation. Specialized Company for Materials, Parts, and Equipment Designation. Global 1000+ Company Designation. Export-Promising SME Designation. UL Certification (2003).Certifications:ISO9001,ISO14001,ISO45001(Quality,Environmental,OccupationalHealthandSafetyManagementSystems).KSProductCertification.High-EfficiencyEnergyEquipmentCertification.DisasterSafetyProductCertification(MinistryofInteriorandSafety).G-PASSCertification(PublicProcurementService).ExcellentProcurementProductCertification(PublicProcurementService).PerformanceCertification(SMEAdministration).KTP(KEPCOTrustedPartner)Certification.INNO-BIZ(TechnologyInnovativeSME).VentureCompanyConfirmation.SpecializedCompanyforMaterials,Parts,andEquipmentDesignation.Global1000+CompanyDesignation.Export-PromisingSMEDesignation.ULCertification(2003).
Technical Strengths: Electrical test certification for 3000kVA seismic-resistant mold transformer (KERI). Seismic test certification for 3000kVA seismic-resistant mold transformer (SGS). Successful development of high-efficiency amorphous transformers. Environmental certification for high-efficiency mold transformers (Climate Test C2, Environmental Test E2, Fire Reaction Test F1).TechnicalStrengths:Electricaltestcertificationfor3000kVAseismic-resistantmoldtransformer(KERI).Seismictestcertificationfor3000kVAseismic-resistantmoldtransformer(SGS).Successfuldevelopmentofhigh-efficiencyamorphoustransformers.Environmentalcertificationforhigh-efficiencymoldtransformers(ClimateTestC2,EnvironmentalTestE2,FireReactionTestF1).