>800kV Range
LQHVF 1000kV/1000pF Multi-Stage Capacitive Voltage Divider
Ultra-High Voltage Measurement for Variable Frequency Applications
The revolutionary LQHVF 1000kV/1000pF voltage divider features a unique four-stage modular design engineered for precision measurements across an exceptional 20-300Hz frequency range. With its 10000:1 dividing ratio and corona-free operation, this system sets new standards for high-voltage testing in research, certification, and power transmission applications.
Technical Specifications
| Parameter | Specification | Standard |
|---|---|---|
| Rated Voltage | 1000kV AC | IEC 60137 |
| Frequency Range | 20-300Hz | IEEE C57.113 |
| Modular Configuration | 4 × 250kV/4000pF units | IEC 61869-11 |
| Nominal Dividing Ratio | 10000:1 | IEC 60044-7 |
| Voltage Ratio Error | ≤±1% | Class 0.5 |
| Measuring Accuracy | <+1.5% | IEC 60060 |
| Dielectric Loss (tanδ) | <0.5% | ASTM D924 |
| Insulation Withstand | 110% VR for 60s | IEC 60071 |
| Cooling System | ONAN (Oil Natural Air Natural) | IEC 60076-2 |
| Connection Flexibility | Single-stage or two-stage serial | IEC 62271 |
Innovative Four-Stage Modular Design
Serial Configuration
Four 250kV/4000pF modules connected in series:
Each unit rated for 250kV operation
Total system capacity: 1000pF
Individual unit testing capability
Flexible Deployment
Configurable as:
Full 1000kV measurement system
Two 500kV independent dividers
Four 250kV test units
Advanced Corona Control
Aluminum alloy corona rings ensure:
Corona-free operation at full voltage
Modular packing for transportation
Scalable HV connections
Stable Foundation
Removable pedestal provides:
Optimal stability during testing
Quick assembly/disassembly
Adaptability to various test sites
Frequency Response Characteristics
Accuracy vs. Frequency (20-300Hz)
| Frequency (Hz) | Ratio Error (%) | Phase Error (minutes) |
|---|---|---|
| 20 | +1.5 | 8 |
| 50/60 | +1.0 | 5 |
| 100 | +0.8 | 4 |
| 200 | +0.5 | 3 |
| 300 | +0.3 | 2 |
Measurement Capabilities
Special lead-wire connection to variable frequency power sources
Precise measurement of both single-stage and two-stage serial configurations
HV corona-free connections for noise-free readings
Thermal stability maintained by ONAN cooling across full frequency range
Industry Applications
Power Transformer Testing
Frequency response analysis during impulse testing per IEC 60076
High-Power Laboratories
Reference standard for calibrating 800kV+ test systems
Renewable Energy Research
Harmonic measurement in HVDC transmission systems
Aerospace Component Testing
Dielectric strength validation at variable frequencies
Certifications & Standards Compliance
IEC 61869-11 (Instrument Transformers)
IEC 60060-1 (High-voltage test techniques)
IEEE 4-2013 (Standard for HV Testing)
EN 50191 (Erection of test facilities)
ASTM D924 (Dielectric Loss Standard)
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