Engineered for critical high-voltage measurement applications, the LQHVF series combines precision engineering with robust safety features. Designed for power utilities, testing laboratories, and industrial facilities, this system delivers laboratory-grade accuracy in field conditions.

Technical Specifications

Electrical Parameters

• Rated Voltage: 680kV AC

• Capacitance: 1000pF (2x2000pF units in series)

• Dividing Ratio: 2000:1 (±0.5% linearity)

• Dielectric Loss: <0.2% at 50Hz

Performance Metrics

• Measurement Accuracy: ≤±1% full scale

• Partial Discharge: <5pC at 680kV

• Insulation Withstand: 748kV (110% rated) for 1 minute

• Cooling System: ONAN (Oil Natural Air Natural)

Innovative Engineering Design

Corona Suppression System

Aluminum alloy corona rings eliminate partial discharge above 300kV, with optimized geometry for:

• Transport-friendly disassembly

• Field-reconfigurable setups

• Voltage uniformity >98%

Modular Pedestal System

Removable stability platform featuring:

• Anti-vibration locking mechanism

• Ground-level measurement terminals

• Modular stacking for 2-stage configurations

Advanced Measurement Capabilities

HV Connection: Corona-free terminals with scalable connectors for:

• Direct transformer bushing interface

• GIS connection kits

• Customizable lead lengths

Industry Compliance & Applications

Standards Certification

• IEC 60060-1: High-voltage test techniques

• IEC 60270: Partial discharge measurements

• ANSI C57.13: Accuracy class requirements

Critical Applications

• Power transformer acceptance testing

• HV cable partial discharge mapping

• Switchgear dielectric verification

• Renewable energy substation commissioning

Operational Safety Protocol

1. Pre-test calibration with reference divider (IEC 60060-2)

2. Grounding verification before energization

3. Thermal monitoring during extended tests

4. Post-test residual charge discharge (5τ time constant)

Safety Note: Requires Class E2 PPE per IEEE 516 for voltages >300kV.