250KV/20pF SF6 Gas-Insulated Capacitor Voltage Divider Technical Specifications

This high-performance voltage divider combines SF6 gas insulation with ultra-low 20pF capacitance design, making it ideal for sensitive measurement applications in high-voltage testing and power system monitoring.

Key Technical Parameters

Advanced Design Features

SF6 Gas Capacitor Technology

• Conducting rod forms gas capacitor with SF6 insulation

• Maintenance-free sealed gas system

• Compact design compared to conventional dividers

• Non-flammable insulation medium

Enhanced Performance Characteristics

• Extended operation: 60 minutes continuous at 100% rated voltage/current

• Rigorous insulation testing: Withstands 275kV for 60 seconds without abnormality

• Wide-frequency measurement: 30-300Hz range covers harmonics analysis

• Ultra-low PD: ≤5pC at rated voltage ensures measurement integrity

Typical Applications

High Voltage Laboratories

• Reference standard for calibrations

• Impulse voltage measurements

Power Grid Monitoring

• EHV transmission line measurements

• Harmonics analysis up to 300Hz

Transformer Testing

• Applied voltage monitoring

• Partial discharge measurements

Installation & Maintenance

1. Requires SF6 gas density monitoring system (typical pressure 0.4-0.6MPa)

2. Install with proper electrostatic shielding for accurate measurements

3. Annual dielectric loss measurement recommended

4. Periodic verification of voltage ratio accuracy

Compliance Standards

• IEC 60060-1 (High-voltage test techniques)

• IEC 61869-11 (Low-power passive voltage transformers)

• IEEE Std 4-2013 (Standard for HV testing)

• GB/T 16927.1 (Chinese national standard for HV testing)

Note: For optimal performance, the measuring instrument should have input impedance ≥100MΩ to maintain specified accuracy with this ultra-low capacitance divider.