Applications

Proven Solutions Across Diverse Sites

Proven stable operation across diverse power system environments, including industrial facilities, buildings, hospitals, and schools.

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Installation Cases

Installation Cases

Proven across a wide range of major industrial sites, delivering tangible performance improvements such as harmonic mitigation and improved efficiency.

  • 01 Korea Airports Corporation
    EquipmentBefore InstallationAfter Installation
    TransformerHigh-efficiency Cast Resin TR (1,700 kVA)Hybrid Oil-Immersed TR (1,700 kVA)
    Active filter60A x 4 units = 240AX

    Analysis Results

    CategoryBefore InstallationAfter InstallationImprovement Results
    Harmonics (THD)10.88.3▼ 23%
    Unbalance11.52.7▼ 77%
    PF0.950.99△ 4%

    Harmonics

    Before
    After

    (Unit : %)

    Unbalance

    Before
    After

    (Unit : %)

    Power Factor

    Before
    After

    (Unit : %)

    • Harmonics Reduction ▼ 23%
    • Unbalance Improvement ▼ 77%
    • Power Factor Improvement △ 4%
  • 02 Ulsan Airport
    EquipmentBefore InstallationAfter Installation
    Aviation lightsHigh-efficiency Cast Resin TR (150 kVA)Hybrid Oil-Immersed TR (200 kVA)
    General PowerHigh-efficiency Cast Resin TR (600 kVA)Hybrid Oil-Immersed TR (750 kVA)

    Before/After - Aviation lights

    Before InstallationAfter Installation
    High-Efficiency Cast-Resin TR 150kVA
    Hybrid Oil-Immersed TR 200kVA

    Before/After - General power

    Before InstallationAfter Installation
    High-Efficiency Cast-Resin TR 600kVA
    Hybrid Oil-Immersed TR 750kVA

    Analysis Results

    CategoryUnitAviation lights(200kVA)General Power(750kVA)
    Before InstallationAfter InstallationRate of Change(%)Before InstallationAfter InstallationRate of Change(%)
    Active power kW 97 122 △ 25.8 99 48 ▼ 51.5
    ITHD % 35.3 11.1 ▼ 68.6 20.2 10.1 ▼ 50.0
    Unbalance % 5.3 4.0 ▼ 24.5 35.6 11.5 ▼ 67.7
    PF % 90.1 92.3 △ 2.4 95.5 98.3 △ 2.9
    • Aviation lights : Harmonics Reduction ▼ 68.6%
    • Unbalance Improvement ▼ 24.5%
    • Power Factor Improvement △ 2.4%
    • General Power : Harmonics Reduction ▼ 50.0%
    • Unbalance Improvement ▼ 67.7%
    • Power Factor Improvement △ 2.9%
  • 03 Korea Expressway Corporation (LED load)
    EquipmentBefore InstallationAfter Installation
    TransformerHigh-efficiency Oil-Immersed TR (200 kVA)Hybrid Oil-Immersed TR (200 kVA)
    Load TypeLEDLED

    Analysis Results

    Category High-efficiency transformer (Before) Hybrid Transformer (After) Reduction(%)
    LED Dimming LED Dimming LED Dimming
    15% 50% 100% 15% 50% 100% 15% 50% 100%
    Voltage(V) 376375375 377377377 △ 0.3△ 0.5△ 0.5
    Current(A) 62105166 5189156 ▼ 17.7▼ 15.2▼ 6.0
    Active Power (kW) 3465106 3056101 ▼ 11.8▼ 13.8▼ 4.7
    Apparent Power (kVA) 4068108 3358102 ▼ 17.5▼ 14.7▼ 5.6
    Power Factor(PF) 0.850.950.98 0.900.970.99 △ 5.9△ 2.1△ 1.0
    V_THD(%) 1.81.51.5 1.51.61.4 ▼ 17.5△ 6.7▼ 6.7
    I_THD(%) 17.18.35.7 13.97.03.1 ▼ 18.7▼ 15.7▼ 45.6
    I_TDD(%) 6.54.85.3 4.03.52.7 ▼ 38.6▼ 27.1▼ 49.1
    • Harmonics Reduction ▼ 49.1%
    • Power Factor Improvement △ 1.0%
  • 04 Major Corporate Plant (General Power Load / Inverter Load)
    EquipmentBefore InstallationAfter InstallationRemarks
    TransformerHigh-Efficiency Transformer × 4 units (4,500 kVA)Hybrid Transformer × 4 units (4,500 kVA) Hybrid Transformer application for inverter-controlled motor loads
    Load TypeGeneral Power, InverterGeneral Power, Inverter
    Hybrid Oil-Immersed TR 1,000kVA
    Hybrid Oil-Immersed TR 1,000kVA
    Hybrid Oil-Immersed TR 1,000kVA
    Hybrid Oil-Immersed TR 1,500kVA

    Analysis Results

    CategoryUnit1,500 kVA1,000 kVA
    Before InstallationAfter InstallationRate of Change(%)Before InstallationAfter InstallationRate of Change(%)
    V_THD % 1.4 1.1 ▼ 21.4 1.3 1.1 ▼ 15.4
    I_THD % 5.1 2.7 ▼ 47.1 13.8 5.7 ▼ 58.7
    V_Unb % 0.7 0.3 ▼ 57.1 0.7 0.2 ▼ 71.4
    I_Unb % 10.4 6.3 ▼ 39.4 6.0 2.9 ▼ 51.7
    PF % 86.4 89.2 △ 3.2 73.3 81.2 △ 10.8
    • 1,000kVA : Harmonics(ITHD) Reduction ▼ 58.7%
    • Unbalance (IUnb) Improvement ▼ 51.7%
    • Power Factor Improvement △ 10.8%
    • 1,500kVA : Harmonics(ITHD) Reduction ▼ 47.1%
    • Unbalance (IUnb) Improvement ▼ 39.4%
    • Power Factor Improvement △ 3.2%
  • 05 J Hotel (Lighting Load / Heating Load)
    EquipmentBefore InstallationAfter Installation
    TransformerHigh-Efficiency Cast Resin TR (400 kVA)Hybrid Cast Resin TR (400 kVA)
    Load TypeLighting & HeatingLighting & Heating

    Analysis Results

    CategoryUnitBefore InstallationAfter InstallationRate of Change (%)
    V_THD %1.161.10▼ 5.2
    I_THD%23.3916.77▼ 30.1
    PF%9396△ 3.0
    • Harmonics(ITHD) Reduction ▼ 30.1%
    • Power Factor Improvement △ 3.0%
  • 06 Incheon Environment Corporation (Concentration Equipment)
    EquipmentBefore InstallationAfter Installation
    TransformerHigh-Efficiency Cast Resin TR (1,000 kVA)Hybrid Cast Resin TR (1,000 kVA)
    Load TypeConcentration EquipmentConcentration Equipment

    Analysis Results

    CategoryUnitBefore InstallationAfter InstallationRate of Change (%)
    V_THD %1.10.8▼ 29.3
    I_THD%5.43.6▼ 33.4
    PF%9494-
    • Harmonics Reduction ▼ 33.4%
  • 07 Dongwha Enterprise (GHG Emissions Reduction)

    Power Quality Diagnostic Results

    Hybrid Transformer replacement reduced voltage and current harmonics while improving overall power efficiency and power factor.

    • An average harmonic reduction of 5–7% per transformer and lower reactive power losses helped reduce power consumption.
    Transformer Voltage / Frequency / Power Factor Load Ratio (%) Voltage Harmonics (%) Current Harmonics (%) THDi (%)
    TR #11 Compliant / Normal (98%)50.8▼ 3.38▼ 7.73▼ 5.58
    TR #12 Compliant / Normal (98%)36.7▼ 2.58▼ 7.53▼ 5.93
    TR #13 Compliant / Normal (90%)60.1▼ 1.52▼ 1.81△ 0.18
    Diagnostic ResultAverage reduction in current harmonics : 5.69%

    Savings Calculation Formula : Transformer capacity (kVA) × THD reduction rate (%) × load factor (%)

    Savings Compared with Post-Replacement Power Consumption

    Measurement Period : Aug. 2023 – Oct. 2023

    Transformer Energy Savings
    (MWh/year)    		 Electricity Cost Savings
    (KRW million/year)    		 Savings Rate
    (%)    		 Investment Cost
    (KRW million)    		 Payback Period
    (years)
    TR #11 420.954.77.63841.5
    TR #12 345.945.05.56841.9
    TR #13 93.512.21.02846.9
    Diagnostic Results 860.4 111.9 3.7 252 2.3

    Electricity charge = Power consumption × KRW 130/kWh / power-use period (28 days/month × 12 months)

    • Converted to annual savings based on the actual operating load before Installation → approximately 3.7% reduction in annual electricity consumption versus before Installation
    • Payback period: 2.3 years based on the same operating load as before Installation
  • 08 Design Application Case

    Hybrid Transformers are clearly specified in single-line diagrams and technical specifications, making them easy and clear to apply from the design stage. They can be reflected directly in drawings and specifications without additional design work, improving efficiency and consistency.

    • Lighting, Power BANK (retail / neighborhood facilities)
      MOLD TR (Hybrid Transformer)
    • 3Φ 500 kVA
    • Primary Voltage : 22.9kV
      Secondary Voltage : 380V / 220V
    • TR#3
      General Power
    • 3Φ -4W, 60Hz
      22.9kV / 380 / 220V 0V 1,500kVA
    • Hybrid Transformer