Why Precision Test Transformers Matter in High-Voltage Applications

High-voltage test transformers like the LQTT 300kV/150kVA model are critical for validating insulation integrity in power systems. With rising global demand for reliable electricity infrastructure, accurate testing equipment ensures compliance with IEC 60270 and IEEE standards. This cylinder-type transformer delivers laboratory-grade precision for utilities, manufacturers, and certification labs.

Technical Specifications: LQTT 300kV/150kVA Test Transformer

Key Performance Features Explained

1. Ultra-Low Partial Discharge Performance

• <5pC at rated voltage enables reliable PD measurements on cables/GIS systems

• Critical for detecting early-stage insulation degradation

• Compliant with IEC 60270 calibration requirements

2. Robust Overload Capability

• 150% rated current for 60s (0.75A HV) without insulation damage

• 110% overvoltage withstand (330kV) for 60s

• Enables impulse testing and fault simulation

3. Optimized Thermal Management

• ONAN cooling eliminates moving parts for maintenance-free operation

• Continuous operation possible at 200kV/0.33A (2/3 capacity)

• Strict ≤65K winding temperature rise ensures insulation longevity

4. Precision Electrical Characteristics

• ≤5% waveform distortion for accurate harmonics-sensitive tests

• ≤10% no-load current minimizes idle power consumption

• 50Hz frequency compatibility with global power standards

Industrial Applications

1. Cable Factory Acceptance Testing

• Routine withstand voltage tests up to 300kV

• PD measurement during commissioning

2. Transformer & Switchgear Validation

• Lightning impulse simulation with overload capability

• GIS partial discharge localization

3. Research Laboratories

• Insulation aging studies under controlled overloads

• Material dielectric strength verification

Operational Advantages

• Portability: <1800kg weight simplifies lab/field deployment

• Safety: Reinforced insulation withstands repeated overvoltage stresses

• Cost Efficiency: ONAN cooling reduces TCO vs. forced-oil designs

• Compliance: Meets IEC 60076 requirements for test transformers

Why Choose This Configuration?

The LQTT 300kV/150kVA model addresses critical industry challenges:

"Low PD levels (<5pC) are non-negotiable for modern HV cable testing. This transformer's cylinder design minimizes stray capacitance, while ONAN cooling ensures stable performance during 30-minute test cycles—critical for accurate dissipation factor measurements."
— Dr. Elena Vasquez, HV Testing Engineer

Implementation Considerations

• Lab Setup: Requires ≥1.5x clearances for 300kV applications

• Maintenance: Annual oil testing recommended despite sealed design

• Accessories: Pair with calibrated capacitive dividers for measurement

• Safety Protocols: Always use grounded cages during overvoltage tests

Conclusion: Precision Engineering for Critical HV Tests

The LQTT 300kV/150kVA test transformer delivers laboratory-grade accuracy in field-deployable packaging. With industry-leading <5pC PD noise floor, overload resilience, and ONAN thermal management, it solves core challenges in:

• Factory acceptance testing (FAT)

• Utility preventive maintenance programs

• High-voltage research applications

Contact our engineers for custom configuration options compliant with your regional standards (IEC/IEEE/ANSI).