HGCC-270kV/500pF Gas Insulated Coupling Capacitor

Engineered for ultra-sensitive high-voltage applications, the HGCC-270kV/500pF coupling capacitor delivers industry-leading <1pC partial discharge performance at 235kV, combined with 500pF capacity for reliable power line carrier communication.

Technical Specifications

Breakthrough Features

1. Unmatched Partial Discharge Control

• Class-leading ≤1pC sensitivity at 235kV

• Specialized electrode design minimizes corona

• IEC 60270 compliant measurement

2. Dual-Function Performance

• Precision Measurement: <+1% accuracy

• Signal Coupling: 500pF carrier capacity

• 50Hz nominal frequency (30-400Hz range)

3. Robust Insulation System

• SF6 gas insulation (0.5MPa nominal pressure)

• 110% voltage withstand capability

• Stable dielectric loss <0.3%

Typical Applications

• Partial Discharge Research: Ultra-sensitive detection systems

• EHV Substations: 275kV system monitoring

• HVDC Filter Banks: Harmonic measurement

• Protection Signaling: Power line carrier communication

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)

Critical Operational Parameters

1. Maximum 30-minute continuous operation at 270kV

2. Minimum 60-minute cooling period required

3. SF6 gas density monitoring mandatory

4. Annual PD verification recommended