HGCC-250kV/400pF SF6 Coupling Capacitor - Precision HV Measurement & Signal Transmission

The HGCC-250kV/400pF SF6 Coupling Capacitor delivers dual functionality for high-voltage systems, combining accurate voltage measurement (<+1% accuracy) with reliable power line carrier (PLC) communication capability. Its 400pF capacity and SF6 gas insulation ensure stable performance across 30-300Hz frequencies.

Technical Specifications

Key Features

1. Dual-Function Design

• Voltage Measurement: <+1% accuracy up to 250kV

• Signal Coupling: 400pF capacity for PLC systems

• Wide Frequency Response: 30-300Hz operation range

2. Enhanced Dielectric Performance

• SF6 gas insulation prevents corona discharge

• Dielectric loss <0.3% at 20°C

• Temperature coefficient <0.0005/°C

3. Robust Construction

• Conducting rod gas capacitor design

• 275kV short-term withstand capability

• IP65-rated enclosure for outdoor use

Typical Applications

• Substation Monitoring: 220kV system voltage measurement

• Power Line Carrier: Protection signaling transmission

• Harmonic Analysis: Wide-frequency measurement (30-300Hz)

• GIS Equipment: Gas-insulated switchgear integration

Standards Compliance

• IEC 60358 (Coupling Capacitors)

• IEC 61869-1 (Instrument Transformers)

• IEEE C37.100 (HV Testing Requirements)

• GB/T 4705 (Chinese Coupling Capacitor Standard)

Operational Guidelines

• Maximum continuous operation: 60 minutes @250kV

• SF6 gas pressure range: 0.4-0.6MPa

• Ambient temperature range: -30°C to +55°C

• Annual dielectric loss verification recommended