400kV ~ 600kV Range
LQHVF 400kV/2000pF Capacitive Voltage Divider
Industry-leading precision with ≤2pC partial discharge capability for critical high-voltage measurement applications in testing laboratories and power utilities.
Key Advantage: World-class ≤2pC partial discharge performance at 400kV - ideal for sensitive insulation diagnostics
Technical Specifications
| Parameter | Specification | Industry Standard |
|---|---|---|
| Rated Voltage | 400kV | IEC 60060-1 |
| Rated Capacity | 2000pF | IEEE 4 |
| Operation Frequency | 60Hz | ANSI C68.3 |
| Partial Discharge (PD) | ≤2pC @ 100% rated voltage | IEC 60270 |
| Dielectric Loss | <0.2% | IEC 60422 |
| Measuring Accuracy | ≤±1% | IEEE 112 |
| Dividing Ratio | 2000:1 | N/A |
| Insulation Withstand | 440kV (110% rated voltage) for 1min | IEC 60071 |
| Cooling System | ONAN (Oil Natural Air Natural) | IEEE C57.12.00 |
Breakthrough Performance Features
Ultra-Low Partial Discharge
≤2pC detection sensitivity at 400kV
Identifies microscopic insulation defects
50% better than industry average (5pC)
Precision Measurement
±1% voltage accuracy across range
2000:1 nominal dividing ratio
Stable 60Hz operation
Robust Insulation System
Certified 440kV/1min withstand
Zero abnormal discharge at overload
Advanced dielectric fluid formulation
Advanced Engineering Design
Optimized Corona Control
Aerospace-grade aluminum corona rings
Scalable corona-free HV connections
Transport-optimized segmented design
Removable Stability Pedestal
Engineered for vibration resistance
Quick-assembly field deployment system
Integrated measurement ports
ONAN Cooling Technology
Natural convection thermal management
Maintains <0.2% dielectric loss
Zero maintenance cooling system
Measurement Capabilities
| Connection Type | Measurement Method | Application |
|---|---|---|
| Single-Stage | Direct lead-wire to power source | Standard factory testing |
| Two-Stage Serial | Balanced capacitive coupling | High-sensitivity PD measurement |
| Scalable HV | Corona-free connection system | Custom voltage configurations |
Note: All configurations use special shielded lead-wires to variable frequency power sources
Certification & Compliance
IEC 60060-1: High-voltage test techniques
IEEE 4: Standard for HV testing
ANSI/NETA ATS: Acceptance testing standards
CE certified (EMC Directive 2014/30/EU)
Safety Protocol: Meets IEEE 516 safety requirements for live working distances at 400kV
Industry Applications
Power Transformer Testing
Detect winding defects with ≤2pC sensitivity during induced voltage tests
Cable Quality Validation
Identify microscopic insulation flaws in HV transmission cables
GIS Diagnostic Testing
Precision PD measurement in gas-insulated substations
Research Laboratory
High-accuracy measurement for dielectric material studies
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