400kV ~ 600kV Range
LQHVF 420kV/1000pF Wide-Frequency Capacitive Voltage Divider
Advanced dual-module solution offering exceptional 30-300Hz frequency range with ±1% accuracy for resonant testing and harmonic analysis applications.
Frequency Versatility: Broadest available 30-300Hz operation range at 420kV - ideal for variable frequency testing
Technical Specifications
| Parameter | Specification | Test Standard |
|---|---|---|
| Rated Voltage | 420kV (dual-module) | IEC 60060-1 |
| Frequency Range | 30Hz - 300Hz | IEC 60076-18 |
| Voltage Ratio Error | ≤±1% (effective value) | IEEE 112 |
| Rated Capacity | 1000pF ±5% | IEEE 4 |
| Partial Discharge | ≤10pC @ rated voltage | IEC 60270 |
| Dielectric Loss | <0.2% | IEC 60422 |
| Dividing Ratio | 1000:1 @ 400kV | N/A |
| Continuous Operation | 60 minutes @ 100% rating | IEEE C57.91 |
| Insulation Withstand | 462kV (110% rated) for 60s | IEC 60071 |
| Configuration | Dual-module system | IEC 60158 |
Advanced Performance Features
Wide Frequency Operation
30-300Hz range for diverse applications
Stable performance across entire spectrum
Ideal for SFRA and resonant testing
Precision Measurement
±1% voltage ratio accuracy
1000:1 nominal dividing ratio
Effective value measurement
Robust Insulation
462kV withstand capability (110% rated)
Dual-module insulation system
Zero abnormal discharge during testing
Dual-Module Design Advantages
Modular Configuration
Two independent modules
Scalable voltage handling
Flexible installation options
Transport-Optimized
Aerospace aluminum corona rings
Segmented design for packing
Corona-free HV connections
Removable Stability System
Engineered pedestal for seismic stability
Quick assembly/disassembly
Integrated measurement ports
Measurement Capabilities
| Connection | Capability | Frequency Advantage |
|---|---|---|
| Single-Stage | Direct measurement up to 210kV | Full 30-300Hz range |
| Two-Stage Serial | 420kV measurement | Harmonic analysis capability |
| Scalable HV | Custom configurations | Resonant frequency adaptation |
All measurements use special lead-wire to variable frequency power sources
Frequency Performance Validation
| Frequency | Accuracy | Dielectric Loss |
|---|---|---|
| 30Hz | ±0.95% | 0.19% |
| 50/60Hz | ±0.85% | 0.18% |
| 150Hz | ±0.92% | 0.19% |
| 300Hz | ±0.98% | 0.20% |
Tested at 420kV in two-stage configuration per IEEE 4 standards
Industrial Applications
Sweep Frequency Response Analysis
Full 30-300Hz range for transformer SFRA testing
Variable Frequency Resonant Testing
Precision measurement in resonant test systems
Harmonic Distortion Measurement
Identify harmonic content in HV power systems
Research & Development
Flexible frequency testing for new equipment designs
Compliance & Certifications
IEC 60060-1: High-voltage test techniques
IEEE 4: Standard for HV testing
IEC 60270: Partial discharge measurements
IEC 60076-18: Frequency response testing
ANSI/NETA ATS-2021: Acceptance testing
CE, RoHS, and UKCA certified
Safety Compliance: Meets IEEE 516-2022 safety requirements for 420kV installations
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