300KV/2000pF SF6 Gas-Insulated Capacitor Voltage Divider & Coupling Capacitor

This innovative device combines high-accuracy voltage measurement with power line carrier (PLC) communication capabilities in a single SF6-insulated package, designed for smart grid applications.

Technical Specifications

Dual-Function Design Advantages

As Voltage Divider

• Precision ±1% measurement accuracy

• 1000:1 standard ratio for protection relays

• SF6 insulation ensures measurement stability

As Coupling Capacitor

• 2000pF optimized for carrier frequencies

• Low dielectric loss (<0.3%) minimizes signal loss

• Integrated design reduces substation footprint

Typical Applications

Smart Grid Communication

• Power line carrier (PLC) systems

• SCADA data transmission

Substation Monitoring

• Combined voltage measurement & communication

• Digital relay systems

High Voltage Testing

• Power factor testing

• Dielectric loss measurements

Installation Guidelines

1. Mount vertically with ±3° tolerance for gas uniformity

2. Maintain SF6 pressure at 0.45±0.05MPa (at 20°C)

3. Use double-shielded cables for measurement circuits

4. PLC connections require impedance matching networks

Maintenance Schedule

Compliance Standards

• IEC 60358 (Coupling capacitors & voltage dividers)

• IEC 60481 (Coupling devices for PLC)

• IEEE C93.1 (Coupling capacitors for power systems)

• DL/T 629 (Chinese standard for power line carrier)

Note: When used for PLC, ensure carrier frequency is within 30-500kHz range and signal power <20W to prevent capacitor overheating.