325KV/400pF SF6 Dual-Function Capacitor Voltage Divider

Engineered for modern smart grids, this innovative device integrates precision high-voltage measurement with power line communication capabilities in a single SF6-insulated unit, delivering exceptional 400pF coupling capacity with measurement-grade accuracy.

Key Technical Specifications

Dual-Function Performance

As Voltage Divider

• Class 1 measurement accuracy (≤±1%)

• Ultra-low ≤5pC partial discharge

• 1000:1 ratio compatible with all standard relays

As Coupling Capacitor

• 400pF optimized capacitance for carrier frequencies

• Low loss design (<0.3%) maximizes signal transmission

• SF6 insulation prevents corona interference

Thermal Management System

• Intermittent Operation: 15-minute active periods prevent gas overheating

• Cooling Cycles: 15-minute rest periods ensure dielectric recovery

• Daily Limit: Maximum 8 cycles (4 hours total operation)

• Thermal Monitoring: Built-in temperature sensors (optional)

Installation Guidelines

1. Mount on stable foundation (max 0.15g vibration tolerance)

2. Maintain SF6 pressure at 0.43±0.02MPa at 20°C

3. PLC connections require:

• Bandpass filters (30-500kHz recommended)

• Surge protection devices

4. Grounding resistance <3Ω (measured at 25Hz)

Maintenance Schedule

Compliance Standards

• IEC 60358-1:2012 (Coupling capacitors & dividers)

• IEEE C93.3-2019 (Power line carrier coupling)

• GB/T 4109-2008 (Chinese HV capacitor standard)

• IEC 61869-11:2018 (Instrument transformers)

Critical Notice: Exceeding 8 daily operation cycles may cause SF6 gas decomposition and permanent dielectric strength reduction. Always allow complete cooling between cycles.