High-Capacitance Solution for Critical HV Systems

Engineered for 10kV power networks, the LQHVF 3000pF capacitive divider combines precision voltage division with PD coupling capabilities. Its high capacitance enables:

• Accurate RMS voltage measurement via 1000:1 ratio

• Low-impedance coupling for sensitive partial discharge detection

• Harmonic analysis up to 10kHz bandwidth

• Dielectric loss monitoring in transformers and cables

Technical Specifications

Dual-Output Connector System

HV Measurement Port

Function: 1000:1 reduced voltage output

Connection: Shielded coaxial to voltmeter

Accuracy: ≤±1% at 50Hz

PD Test Port

Function: Direct capacitive coupling

Connection: BNC to PD analyzer

Bandwidth: 20Hz-10kHz

Note: Simultaneous operation allows correlation of voltage transients with PD events.

Advanced Thermal Management

ONAN Cooling System: 40% longer continuous operation vs. air-cooled dividers

• Oil-Immersed Design: Mineral oil dissipates hotspot temperatures

• Thermal Stability: <5°C temperature rise during 60-min full-load operation

• Operating Regimes:

• 60 minutes at 10kV

• Continuous duty at 8kV

Structural Features

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

• Corona Suppression: Optimized ring geometry reduces RF interference

• Compact Footprint: 65mm × 90mm × 420mm (fits switchgear compartments)

• Sealed Oil System: Hermetic design prevents moisture ingress

Compliance & Applications

Standards Compliance:

• IEC 61869-11:2023 (Instrument Transformers)

• IEEE 4-2013 (High-Voltage Testing)

• EN 60076-11 (Dry-Type Transformers)

Key Applications:

1. On-line PD monitoring in substations

2. Factory acceptance testing of HV equipment

3. Power quality measurement in renewable energy systems

4. Research labs studying insulation aging

Operational Protocol

1. Grounding: Connect base to earth ground with 10mm² cable

2. Pre-Energization Check: Verify oil level in sight glass

3. PD Testing: Use 50Ω coaxial cable ≤3m to PD analyzer

4. Cooling: Maintain 30cm clearance around unit

Pro Tip: For PD measurements, connect voltmeter port to oscilloscope to synchronize voltage phase with PD pulses