Technical Specifications Breakdown

Key Engineering Innovations

Ultra-Low Partial Discharge Design

Achieves industry's lowest PD background for:

• Validating 400kV class GIS insulation

• Precision cable termination tests

• Sensitive research applications

Compact High-Voltage Architecture

• Ø1500×2000mm cylinder enables:

• Mobile test lab integration

• Reduced SF₆ consumption in test chambers

• 30% faster deployment vs. conventional designs

• <2500kg weight simplifies:

• Offshore platform testing

• Mountainous substation access

Thermal Management System

• ONAN cooling delivers:

• 60-minute continuous operation @ 350kV/0.143A

• Stable ΔT ≤65K (winding)/55K (oil)

• Zero maintenance vs. forced-cooled systems

• 80% rated voltage continuous mode for:

• Long-duration aging tests (28kV/day)

• Environmental stress screening

Compliance & Safety Features

• Insulation Coordination:

• 10% impedance voltage limits fault currents

• <10% no-load current reduces energization stress

• Overload Protection:

• 110% voltage withstand (385kV/60s)

• 120% current withstand (0.172A/60s)

• Meets:

• IEC 60076-14 (Power transformers)

• IEEE C57.12.90 (Test procedures)

Industrial Applications

1. Cable Manufacturers

• Type tests for 500kV HVDC cables

• PD measurement during bending tests

2. Utility Maintenance Teams

• On-site insulator string validation

• Mobile testing of remote substations

3. Research Institutions

• Spacecraft dielectric validation

• Polymer insulation aging studies

Performance Comparison

*Why 350kV/50kVA beats conventional solutions:*

Implementation Blueprint

Critical Installation Notes:

1. Maintain 5m clearance at 350kV output

2. Use corona rings above 250kV

3. Ground tank via multi-point system

Technical Validation

"The <5pC PD specification allows direct measurement of cable accessories without background subtraction - previously impossible with mobile test systems. This redefines field diagnostics for ultra-high-voltage networks."
— Dr. Michael Reinhardt, CIGRE WG B1.44 Chair

Conclusion: Precision in High-Voltage Field Testing

The LQTT 350kV/50kVA sets new standards for:

• Voltage compactness (350kV in Ø1.5m)

• Measurement integrity (<5pC PD noise)

• Field endurance (60-min continuous operation)

Ideal for:
▸ Offshore wind farm commissioning
▸ HVDC cable qualification
�️▸ Aerospace component testing