Engineered for ultra-high-voltage testing environments, the LQHVF 700kV/6000pF capacitor voltage divider delivers laboratory-grade precision in field applications. Designed for power transmission verification, transformer testing, and switchgear validation, this dual-stage system operates at frequencies from 20-300Hz with exceptional stability.

Technical Specifications

Electrical Parameters

• Rated Voltage: 700kV AC

• Configuration: Two-stage (2×350kV)

• Stage Capacitance: 12,000pF per stage

• System Capacitance: 6,000pF

• Frequency Range: 20-300Hz

Performance Metrics

• Dividing Ratio: 7000:1 nominal

• Ratio Error: ≤±1.5% (RMS)

• Dielectric Loss: <0.5% @ 50Hz

• Insulation Withstand: 770kV (110%) / 385kV per stage

• Cooling System: ONAN (Oil Natural Air Natural)

Innovative Engineering Features

Modular Corona Suppression

• Aluminum alloy corona rings optimized for 700kV+ operation

• Quick-disassembly design for transport efficiency

• Field-reconfigurable for single/dual-stage setups

Stabilized Pedestal System

• Removable foundation with seismic-grade stability

• Integrated vibration dampening

• Ground-level measurement terminals

Advanced Measurement Capabilities

Connection System

• HV corona-free termination system

• Scalable connectors for transformer/GIS interfaces

• Low-inductance measuring leads (≤5nH/m)

• Variable frequency power source compatibility

Certifications & Industry Applications

International Standards

• IEC 60060-1: High-voltage test techniques

• IEC 60270: Partial discharge measurement

• IEEE C57.98: Dielectric loss guidelines

Critical Applications

• Extra-high-voltage transformer commissioning

• HVDC converter station testing

• Cable system partial discharge analysis

• Renewable energy substation diagnostics

Safety & Maintenance Protocols

1. Pre-energization dielectric verification (IEC 60480)

2. Dual-grounding check before testing

3. ONAN oil temperature monitoring (max 65°C)

4. Annual recalibration per ISO/IEC 17025

Safety Notice: Requires Class E4 PPE per IEC 61482 for operations >500kV. Minimum clearance: 5 meters.