Advanced High-Voltage Measurement for Critical Applications

The LQHVF series represents the pinnacle of high-voltage measurement technology, engineered for precision in power transmission testing, research laboratories, and substation monitoring. With a 1000kV rating and industry-leading ≤5pC partial discharge levels, this solution sets new benchmarks for reliability in ultra-high-voltage environments.

Technical Specifications

Engineering Advantages

Corona-Free Operation

Specialized aluminum alloy corona rings eliminate discharge phenomena at ultra-high voltages, ensuring measurement integrity even at 1000kV.

Modular Design

Removable pedestal and scalable HV connections enable flexible configurations for:

• Single-stage voltage measurement

• Two-stage series connection

• Portable field testing setups

Thermal Management

ONAN (Oil Natural Air Natural) cooling system maintains stable dielectric performance during continuous 1-hour operation at full load.

Measurement Precision

Special lead-wire connection to variable frequency power source delivers:

• Phase error <5 minutes

• Ratio error <0.2%

• Temperature stability: ±0.005%/°C

Applications

• High-Power Laboratories: Calibration reference for impulse generators

• Transformer Testing: PD measurement during routine maintenance

• Transmission Line Monitoring: Online voltage verification in 800kV+ systems

• Research Facilities: Dielectric strength evaluation of new materials

Compliance & Safety

Designed in accordance with international standards:

• IEC 61869 (Instrument Transformers)

• IEC 60060 (High-Voltage Test Techniques)

• IEEE 4 (Standard for HV Testing)

• EN 50191 (Erection and Operation of Test Facilities)