Capacity up to 765kV 2000MVA, worldwide expriences with proven record
Competitive price
On-time delivery
Qualified engineers and skilled workers
Advanced design technology to perform seismic analysis and short-circuit calculation
Equipped with the most advanced manufacturing and testing equipment
Quality control on every process of manufacturing
ISO9001, ISO14000 OHSAS18000
1. Production Capacity
1) Annual production capacity : 100,000MVA
200kV class factory up to 200kV
300kV class factory up to 300kV
400kV class factory up to 400kV
500kV class factory up to 500kV
800kV class factory up to 800kV
Distribution transformer factory
2) Transformer MVA : up to 1,300MVA
3) Transformer voltage : up to 800kV
4) Total factory space : 600,000 ft2
5) Manpower for Transformer factory

78 Design Engineers
50 Test Engineers
960 Workers
15 Development Engineers

2. Production History
HHI is leading manufacturer in the world market
FY1978 161kV
FY1979 345kV
FY1985 400kV
FY1993 500kV
FY1997 765kV

FY1999 17,300MVA
FY2000 21,700MVA
FY2001 26,700MVA
FY2002 29,500MVA
FY2003 32,000MVA
FY2004 35,000MVA
FY2006 60,000MVA
FY2008 90,000MVA
3. Production Range
1) Power transformer
2) Distribution transformer
3) Cast resin transformer (Up to 30kV, 7MVA)
4) Reactor
5) SF6 Gas Insulated Power Transformer
6) Special purpose transformer
5. Xformer with Natural Ester-based Fluids Characteristics
     of Natural Ester-based Fluids
Reduced Fire Liability
Reduced Environmental Liability
Insulation Life Extension
Prevents Moisture Buildup in Insulation Paper
Reduction in Voltage Stress Gassing Tendency
Elimination of Sludge and Copper Coking
6. Inspection and Test Program
1) Routine Test
Winding Resistance Measurement
Ratio Check
Phase Relationship Check
Insulation Resistance Measurement
Insulation Power Factor Measurement
No load loss & Current Measurement
Impedance Voltage & Load Loss Measurement
Impulse Test & Switching Impulse Test
Induced Over-Voltage Withstand Test
Partial Discharge & RIV Measurement
Oil Leakage Test
4. R&D and 3D CAD System
Design Department-Standardization & Manufacturing Design
1) Electro Mechanical Research Institute
Electro Magnetic Analysis
Thermal & Fluid Analysis
2) VIT -Ukraine
Ultra High Voltage Transformer
Gas Insulated Transformer
Basic Design & Analysis
3) Industrial Research Institute
Mechanical strength
4) Maritime Research Institute
Vibration & Noise
5) Hunelec - Hungary
Hybrid Insulated Transformer
Light Weight Transformer
Basic Design & Analysis