About SETI
Shinseong E&T, INC.
A South Korean transformer manufacturer supplying IEEE/ANSI/DOE-compliant distribution and power transformers to utilities, commercial, and industrial customers worldwide.
Company Overview
Shinseong E&T, INC. (SETI) is a specialized manufacturer of liquid-immersed distribution and power transformers headquartered in Hwaseong-si, Gyeonggi-do, South Korea. SETI designs and produces overhead and pad-mounted distribution transformers engineered to meet North American IEEE, ANSI, and U.S. Department of Energy standards, as well as international IEC requirements.
SETI's manufacturing facility operates under rigorous quality management procedures, with 100% factory acceptance testing performed on every production unit in accordance with IEEE C57.12.90. Certified Factory Test Reports (CTR) are provided with each delivery.
SETI supplies transformers on a Delivered Duty Paid (DDP) basis to U.S. and global project sites, managing ocean freight, inland transit, customs clearance, and applicable import tariffs within its scope of supply — simplifying procurement for utility and industrial customers.
Manufacturing Capabilities
Single-Phase Pole-Mounted
Overhead distribution transformers through 833 kVA, 34.5 kV class, for utility line distribution.
Single-Phase Pad-Mounted
Underground compartmental transformers through 833 kVA in radial-feed and loop-feed configurations.
Three-Phase Pad-Mounted
Compartmental-type three-phase transformers through 5 MVA for utility, commercial, and renewable energy applications.
Power Transformers
Large power transformers engineered to customer specification for substation and industrial applications.
Company Milestones
1990s
Founded in South Korea
Established as Shinseong E&T, INC. in Hwaseong-si, Gyeonggi-do, with a focus on liquid-immersed distribution transformers.
2000s
IEEE & ANSI Certification
Achieved full compliance with IEEE C57 series and ANSI standards, enabling direct supply to North American utilities and industrial customers.
2010s
DOE Efficiency Standards
Qualified under U.S. DOE 10 CFR Part 431 energy conservation standards, including early adoption of efficiency requirements for distribution transformers.
2020s
Global Export Expansion
Expanded DDP export capability to U.S. and global project sites, managing ocean freight, customs clearance, and import tariffs within SETI's scope of supply.
2029
DOE 2029 Standards Ready
All current production designs are engineered to comply with the amended DOE 10 CFR Part 431 Subpart K standards effective April 23, 2029.
Headquarters
Shinseong E&T, INC.
26-12 Seokgyo-ro, Mado-myeon
Manse-gu, Hwaseong-si
Gyeonggi-do, South Korea 18537
Key Certifications
- IEEE C57 Series Compliance
- ANSI C57 Standards
- DOE 10 CFR Part 431 Certified
- DOE 2029 Standards Ready
- NEMA TR 1 Compliance
- IEC 60076 (on request)
Start a Project
Ready to specify? Submit your technical requirements and our engineering team will respond within 1–2 business days.
Request a QuoteStandards & Compliance Credentials
Product Standards
- IEEE C57.12.00
- IEEE C57.12.20
- IEEE C57.12.28
- IEEE C57.12.34
- IEEE C57.12.38
- IEEE C57.12.70
- IEEE C57.12.90
- IEEE Std 386
- NEMA TR 1
Energy & Regulatory
- DOE 10 CFR Part 429
- DOE 10 CFR Part 431 Subpart K
- DOE 2029 Amended Standards
Fluid & Material
- ASTM D3487 (Mineral Oil)
- ASTM D6871 (Natural Ester)
- GOES Core Steel
Engineering Documentation
Certified Factory Test Reports (CTR)
Issued with every production unit per IEEE C57.12.90.
Submittal Approval Drawings
Engineering drawings submitted for customer approval prior to production.
Technical Data Sheets
Loss/efficiency calculations, dimensional data, and nameplate details.
Component Approval Documents
Material and component certifications for traceability.
Delivery & Commercial Terms
DDP Delivery
SETI supplies transformers on a Delivered Duty Paid (DDP) basis to your designated U.S./global project site. Ocean freight, inland transit, U.S. customs clearance, and applicable import tariffs are managed directly within SETI's scope of supply. Local state sales tax/VAT remain purchaser's responsibility.
Standard Production Schedule
Lead times reflect ex-factory readiness upon final customer approval of engineering submittal drawings.
Design Notice
All specifications and dimensions are subject to continuous engineering enhancement and may change without prior notice based on custom design reviews.