<1000kV Range
LQHID 200KV/400pF Weak Damping Capacitor Voltage Divider
Engineered for laboratory-grade precision in high-voltage transient measurements, the LQHID 200KV/400pF Weak Damping Capacitor Voltage Divider delivers exceptional performance in lightning impulse testing and power systems research. With enhanced capacitance and GB311-compliant response characteristics, this instrument ensures reliable data acquisition in critical 200kV applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HID 200KV/400pF |
| HV Arm Capacitor | Single-stage 200kV/400pF |
| Standard Lightning Wave | 200kV impulse withstand |
| Rated Capacitance | 400pF ±5% |
| Voltage Ratio | 1000:1 |
| Partial Response Time (Tα) | ≤100 nanoseconds |
| Overshoot (β) | ≤20% |
| Scale Factor Uncertainty (Ks) | ±1% |
| Square Wave Response | 0~9.9μS per GB311 standard |
| Dimensions | 0.8m × 0.8m × 1.8m (L×W×H) |
Performance Advantages
High-Capacitance Design
The 400pF single-stage capacitor provides superior signal-to-noise ratio for accurate measurement of fast transients and low-magnitude waveforms.
Ultra-Fast Response
≤100ns partial response time with ≤20% overshoot ensures precise capture of lightning impulses (1.2/50μs) and switching surges.
Stable Voltage Scaling
Maintains 1000:1 ratio with ±1% uncertainty even under extreme electromagnetic interference conditions.
Standards Compliance
Full compliance with GB311 square wave response requirements (0-9.9μS)
Meets IEC 60060-1 high-voltage test standards
Compatible with IEEE 4 standard for impulse measurements
Designed for ASTM D1868 insulation testing protocols
Key Applications
Transformer Testing: Lightning impulse withstand tests on 200kV-class units
Cable Diagnostics: Partial discharge detection in HV transmission cables
Switchgear Validation: Switching surge measurement in GIS installations
Research & Development: Transient overvoltage studies in HVDC systems
Operational Features
| Feature | Benefit |
|---|---|
| Weak Damping Topology | Minimizes waveform distortion during steep-front impulses |
| Compact Footprint | Space-efficient 0.8×0.8m base for lab integration |
| Monolithic Capacitor | Eliminates multi-stage reflection errors |
| Wide Frequency Response | DC to 10MHz bandwidth for full impulse characterization |
Environmental Specifications
Operating temperature: -25°C to +55°C
Storage humidity: ≤95% non-condensing
Altitude rating: Up to 2000m ASL
Connection interfaces: SHV/TNC/N-type options
Maintenance Protocol
Annual dielectric verification at 220kV AC
Biannual ratio calibration per IEC 61869-14
Resistance check every 6 months
5-year capacitor reconditioning cycle
Why Choose This Model?
The LQHID 200KV/400pF excels in critical applications requiring:
High capacitance (400pF) for improved signal integrity
Faithful reproduction of standard 200kV impulses
Consistent performance in high-EMI environments
Long-term stability with minimal calibration drift
Technical Support Services
Our HV engineering team provides:
GB311 compliance verification reports
Test setup optimization for specific DUTs
NIST-traceable calibration certificates
Integration support with major oscilloscope brands
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