SF6 1250kV/500pF Capacitor Voltage Divider - Ultra-High Capacity Coupling & Measurement

This 1250kV/500pF SF6 Capacitor Voltage Divider sets new benchmarks in ultra-high-voltage (UHV) technology, combining precision measurement (≤1% accuracy) with power line coupling functionality in a single gas-insulated unit. Its exceptional 500pF capacity enables simultaneous voltage monitoring and signal transmission in 1000kV+ systems.

Technical Specifications

Dual-Functional Advantages

1. Precision Voltage Measurement

• Industry-leading <+1% accuracy at 1250kV

• Temperature-stable (<0.0005/°C coefficient)

• 4000:1 ratio for sensitive instrumentation

2. High-Capacity Coupling

• 500pF capacity enables 200kHz+ carrier signals

• Low-loss design (<0.2%) maintains signal integrity

• IEC 60358 compliant coupling performance

Engineering Breakthroughs

Extreme Voltage Performance

• 105% overload capability (1312.5kV)

• SF6 gas insulation prevents corona above 800kV

• Conducting rod design minimizes inductance

Advanced Partial Discharge Control

• ≤3pC sensitivity at 80% rated voltage

• Shielded structure reduces external interference

• Compatible with IEC 60270 measurement systems

Typical Applications

• UHV Transmission Lines: 1000kV+ system monitoring

• Converter Stations: HVDC valve hall measurements

• Power Line Carrier: Protection signaling at 1250kV

• Research Facilities: Dielectric testing up to 1312kV

Standards Compliance

• IEC 61869-1/-2 (Instrument Transformers)

• IEEE C37.100 (HV Testing Requirements)

• GB/T 4109 (UHV Equipment Standards)

• IEC 62271-303 (SF6 Handling)

Critical Operational Guidelines

1. Strictly adhere to 5-minute operational periods

2. Maintain 30-minute cooling intervals

3. Maximum 20 activation cycles per 24-hour period

4. SF6 gas pressure must remain at 0.45±0.05MPa