HGCC-540kV/500pF SF6 Coupling Capacitor - High-Voltage Measurement & Power Line Communication

The HGCC-540kV/500pF SF6 Coupling Capacitor delivers dual functionality for extra-high-voltage (EHV) systems, combining precision voltage measurement (3000:1 ratio, ≤1% accuracy) with 500pF coupling capacity for power line carrier (PLC) communication. Its SF6 gas insulation ensures stable performance across 45-65Hz frequencies.

Technical Specifications

Key Features

1. Dual-Function Design

• Precision Measurement: ≤+1% accuracy with 3000:1 ratio

• Signal Coupling: 500pF capacity for PLC systems

• Wide Frequency Response: 45-65Hz operation range

2. Advanced Insulation System

• SF6 gas insulation prevents corona discharge

• Dielectric loss <0.3% at 20°C

• Temperature coefficient <0.0005/°C

3. Robust Performance

• 110% overload capability (594kV for 60s)

• Conducting rod gas capacitor design

• 60-minute continuous operation at 540kV

Typical Applications

• EHV Substations: 500kV system voltage measurement

• HVDC Converter Stations: Valve hall monitoring

• Power Line Carrier: Protection signaling transmission

• Research Facilities: Dielectric testing up to 594kV

Standards Compliance

• IEC 60358-1:2012 (Coupling Capacitors)

• IEC 61869-1:2007 (Instrument Transformers)

• IEEE C37.100.1-2007 (Partial Discharge)

• GB/T 4109-2008 (Chinese EHV Standards)

Operational Guidelines

• Maximum continuous operation: 60 minutes @540kV

• SF6 gas pressure range: 0.4-0.6MPa

• Ambient temperature range: -25°C to +55°C

• Annual dielectric loss verification recommended