Hybrid Technology for Superior HV Measurement

Engineered for critical 20kV applications, the LQHVF combines resistive and capacitive elements to deliver:

• Extended frequency response (DC to 50kHz)

• Ultra-low phase displacement for power factor measurements

• Enhanced stability under rapid voltage transients

• Superior noise immunity in industrial environments

Technical Specifications

Hybrid Technology Benefits

Resistive Element

Function: DC and low-frequency measurement

Advantage: Stable thermal performance

Temp Coefficient: <50ppm/°C

Capacitive Element

Function: High-frequency response

Advantage: Fast transient capture

Bandwidth: DC-50kHz

Measurement Advantage: Simultaneous RMS voltage and partial discharge detection with phase correlation capability.

Advanced Structural Design

• Oil-Immersed Construction: High-grade mineral oil for thermal management and arc suppression

• Modular Components: Removable corona rings, L-arm, HV arm, and base

• ONAN Cooling System: Natural oil/air convection for continuous operation

• Dual-Size Base: p100/p200 options for stability on varied surfaces

• Corona-Free HV Terminal: Special alloy electrode minimizes RF interference

Operational Specifications

• Operating Time: 60 minutes continuous at 20kV

• Temperature Range: -25°C to +55°C

• Cooling Requirements: 20cm clearance around unit

• Calibration Interval: 12 months or 500 operating hours

Field Benefit: 25% faster setup than conventional dividers due to modular design

Compliance & Applications

Standards Compliance:

• IEC 61869-11:2023 (Instrument Transformers)

• IEEE 4-2013 (High-Voltage Testing)

• EN 60060-1:2010 (HV Test Requirements)

Critical Applications:

1. Impulse voltage measurement in test labs

2. On-line PD monitoring in 20kV switchgear

3. Power quality analysis in industrial facilities

4. Research on dielectric materials

Operational Protocol

1. Grounding: Establish earth connection with ≥10mm² cable

2. Assembly: Connect HV arm to corona ring using torque wrench (8Nm)

3. Cooling Check: Verify oil level sight glass before energization

4. Measurement:

• Resistive output for DC/low-frequency

• Capacitive output for AC/high-frequency

5. Post-Operation: Allow 10-minute discharge period before disassembly