HGCC-750kV/300pF Gas Insulated Coupling Capacitor

Engineered for ultra-high-voltage applications requiring dual-frequency operation, the HGCC-750kV/300pF coupling capacitor delivers industry-leading ≤1pC partial discharge performance at 550kV, with specialized 50Hz/200Hz measurement capability for power systems and harmonic analysis.

Technical Specifications

Breakthrough Features

1. Dual-Frequency Precision

• Standard 50Hz power frequency measurement

• 200Hz capability for harmonic analysis

• ≤+1% accuracy at both frequencies

2. Unmatched Partial Discharge Control

• Class-leading ≤1pC sensitivity at 550kV

• Optimized electrode geometry

• IEC 60270 compliant measurement

3. Transformer-Synchronized Operation

• Automatically matches connected transformer duty cycle

• No separate operational time limitations

• Integrated temperature monitoring

Typical Applications

• UHV Substations: 750kV system monitoring

• HVDC Filter Banks: 200Hz harmonic measurement

• GIS Partial Discharge: Ultra-sensitive detection

• Converter Transformers: Synchronized testing

Standards Compliance

• IEC 60358-1:2012 (Coupling Capacitors)

• IEC 61869-1:2007 (Instrument Transformers)

• IEEE C57.142-2010 (Harmonic Measurement)

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

System Integration Notes

1. Designed for direct transformer-coupled operation

2. SF6 gas density monitoring required (0.5±0.05MPa)

3. 200Hz operation limited to 4-hour continuous use

4. Annual PD verification mandatory