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>400kV Range

LQTT 600kV(2x300kV) Modular AC Hipot Test System | 2×300kV Units | ≤5pC Partial Discharge | IEC-Compliant

50Hz LQTT-600kV AC test transformer system: Dual 300kV modules, 600kVA capacity. Features real-time HV monitoring, ≤5pC PD levels, ONAN cooling, and surge protection. Ideal for high-voltage withstand testing.


  • US$ 118,771.00
  • Lead time: 90 days

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Product Details

Product Tags

⚡ Core System Specifications

ParameterSpecification
Configuration2×300kV cylindrical modules
Rated Capacity600 kVA (LV & HV)
Frequency50 Hz
HV Output600 kV @ 1A
LV Input2×3kV @ 2×100A
Waveform Distortion≤3%
Impedance Voltage≤12%
No-Load Current≤10%
Measurement Winding2000:1 ratio

🛡️ Safety & Protection Systems

  • Real-time HV Monitoring

    • HV terminal grounded via 5/5A current transformer (CT)

    • Continuous current measurement for operator safety

  • Surge Protection

    • 3kV surge arrester on excitation/transfer windings

  • Overload Capabilities

    • Current: 125% rated current (1.25A) for 300s

    • Voltage: 110% rated voltage (660kV) for 60s

  • Partial Discharge (PD)

    • <5pC at 600kV | <3pC at 480kV (complete system)

🌡️ Thermal Performance

Operating ModeDurationTemperature Limit
Full load (100%)60 minutes max-
Continuous (80% load)UnlimitedWinding ≤65K, Oil ≤55K

� Component Transformers

1. Upper Stage (HCTT300kV/300kVA)

  • Rating: 300kVA, 3kV(LV)/300kV(HV)

  • Currents: 100A (LV), 1A (HV)

  • PD Level: <5pC @ 300kV, <3pC @ 240kV

  • Insulation: >2,500MΩ (all windings-to-earth)

  • Noise: ≤60dB @ 4m

2. Sub-Stage (HCTT300kV/600kVA)

  • Capacities: LV 600kVA, HV 300kVA, Transfer 300kVA

  • Voltages: HV 300kV, Transfer 3kV

  • Identical PD/Insulation specs as Upper Stage

🔬 Critical Technical Data

FeatureSpecification
Voltage Unbalance≤5% (series-connected modules)
Insulation Tests10kV/1min (LV-HV/housing)

5kV/1min (measurement windings)
Transformer OilBreakdown >60kV/2.5mm

Moisture <10ppm, Dielectric loss <0.5%@90°C

Acetylene-free, Solidifying point <-40°C
CoolingONAN (Oil Natural Air Natural)


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