600kV ~ 800kV Range
LQHVF 800kV/3500pF Coupling Capacitor & Capacitive Voltage Divider
Engineered for ultra-high-voltage applications, the LQHVF 800kV capacitive divider delivers laboratory-grade precision in field environments. With dual-unit modular design and industry-leading ≤2pC partial discharge performance, it's ideal for critical infrastructure testing.
Core Technical Specifications
Parameter | Specification | Standard |
---|---|---|
Rated Voltage | 800kV | IEC 60060-1 |
Configuration | 2 units in series | - |
Total Capacitance | 3500pF | IEC 60358 |
Single Unit Capacitance | 7000pF | |
Dividing Ratio | 2000:1 | - |
Measurement Accuracy | ±1% | IEC 60060-2 |
Dielectric Loss | < 0.2% | IEC 60247 |
Partial Discharge | ≤2pC @ 100% voltage | IEC 60270 |
Insulation Withstand | 880kV (110%) for 1 minute | IEEE 4 |
Cooling System | ONAN (Oil Natural Air Natural) | IEC 60502 |
Advanced Engineering Features
Modular Series Design
Two 400kV/7000pF units connected in series provide:
Transport-friendly configuration (reduced height/weight)
Individual unit testing capability
Redundancy for critical operations
Corona-Free Operation
Aluminum alloy corona rings optimized for 800kV
Detachable rings for compact transportation
Scalable HV connections for different test configurations
Precision Measurement System
Special lead-wire connects directly to variable frequency power sources for:
Single-stage and two-stage serial voltage measurements
Harmonic distortion < 0.5%
Automatic temperature compensation
Structural Advantages
Optimized Mechanical Design
Removable Pedestal: Provides stability while enabling rapid redeployment
ONAN Cooling: Natural oil convection maintains <55°C at full load
Transport-Optimized: Componentized assembly fits standard HV equipment trailers
Performance Validation Tests
Test | Condition | Result |
---|---|---|
Partial Discharge | 800kV continuous | ≤2pC sustained |
Dielectric Withstand | 880kV for 60 seconds | No flashover/corona |
Thermal Stability | Ambient 40°C at 100% load | Oil temp rise <30K |
Ratio Accuracy | 300-800kV range | ±1% linearity |
Industry Applications
Substation Commissioning
800kV GIS testing with 2000:1 ratio for precise RMS measurement
Partial Discharge Mapping
≤2pC sensitivity for transformer/cable defect detection
Renewable Energy Grids
HVDC converter station monitoring with VF power source compatibility
Compliance & Certification
IEC 60060-1/2: High-voltage test techniques
IEEE 4: Standard for HV testing
IEC 60270: Partial discharge measurements
IEC 60137: Insulated bushings
All units include NIST-traceable calibration and dielectric loss test certificates.
Field Deployment Tip
For PD measurements above 600kV, maintain relative humidity <70% and use shielded measuring leads to preserve ≤2pC sensitivity.
Ordering Information
Package includes: Two capacitor units, aluminum corona rings, removable pedestal, HV measuring lead-wire kit, and calibration documents. Request factory test reports for 880kV withstand validation.