Revolutionary Power Density Specifications

Engineering Breakthroughs

Power-Optimized Magnetic Circuit

Enables unprecedented 75% power increase in same form factor versus previous generation

High-Current Capability

• 0.25A output current (75% higher than standard 350kV transformers) supports:

• Testing of long cable runs (>3km 400kV cables)

• GIS systems with multiple gas compartments

• Simultaneous multi-object validation

• 210.8A input current allows direct grid connection without step-down transformers

Thermal Management System

• ONAN cooling maintains safety margins at:

• 100% load for 60 minutes (350kV/0.25A)

• Continuous operation at 280kV/0.2A (80% rating)

• Copper winding design ensures ≤65K temperature rise during:

• Extended type tests (IEC 60840)

• Sequential PD measurements

Performance Comparison vs. Industry Standards

Mission-Critical Applications

1. HVDC Cable Manufacturing

• Routine testing of 500kV extruded cables

• PD mapping during bending cycle tests

2. GIS Commissioning

• Simultaneous testing of multiple gas compartments

• Partial discharge localization in 400kV stations

3. Renewable Energy Projects

• Offshore substation commissioning

• Long-run submarine cable validation

Compliance & Safety Features

• Ultra-Low Impedance (≤10%):

• Ensures stable voltage regulation during capacitive load switching

• Limits short-circuit forces on windings

• Waveform Purity (≤5% distortion):

• Meets IEC 60060-1 requirements for test voltage shape

• Enables accurate tan-delta measurements

• Insulation Coordination:

• 10% no-load current minimizes inrush transients

• 415V input compatibility with industrial power systems

Implementation Schematic

Field Deployment Protocol:

1. Foundation: Minimum 3m² reinforced pad

2. Clearance: 5m radius at 350kV output

3. Safety: Integrated emergency discharge circuit

Technical Validation

"The 0.25A output current enables testing of entire GIS bays without derating - previously requiring multiple transformers. Combined with its <1800kg weight, this redefines what's possible in mobile high-power test systems."
— Prof. Liu Wei, CIGRE B3.34 Working Group Member

Operational Advantages

• Cost Savings:

• 40% reduced transport costs vs. conventional units

• No forced cooling maintenance

• Time Efficiency:

• 50% faster setup with integrated lifting points

• Parallel testing capability reduces project timelines

• Safety Enhancements:

• Automatic oil expansion compensation

• Dual-pressure relief systems

Conclusion: The New Benchmark in HV Testing

The LQTT 350kV/87.5kVA delivers unprecedented advantages:

• Highest power density (104kVA/m³) in its class

• Extended testing capability (60 min at full load)

• Precision diagnostics (<5pC PD sensitivity)

Ideal for:
▸ EPC contractors in power transmission
▸ National high-power test laboratories
▸ Offshore wind farm commissioning teams