800KV/30pF SF6 Capacitor Voltage Divider

This ultra-high voltage measurement device delivers unprecedented wide-band performance for 800KV-class transmission systems, combining 4000:1 high-ratio measurement with extended 180-minute operation capability.

Technical Specifications

Breakthrough Features

Wide-Frequency Technology

• 30Hz for sub-synchronous resonance studies

• 50/60Hz fundamental power measurements

• Up to 300Hz (6th harmonic) analysis

• Flat frequency response (±0.2dB)

Thermal Management System

• Optimized gas flow design

• Distributed temperature sensors

• 180-minute continuous rating

• 60-minute cooldown period

Typical Applications

UHV Transmission

• 765KV line voltage monitoring

• Power quality analysis

Research Facilities

• Sub-synchronous oscillation studies

• Harmonics measurement up to 300Hz

Converter Stations

• HVDC valve-side measurements

• Characteristic harmonic analysis

Installation Requirements

1. Climate-controlled environment (±2°C)

2. Maintain SF6 pressure at 0.70±0.02MPa (20°C)

3. Use low-noise triaxial cables (min 12mm diameter)

4. Grounding resistance <0.5Ω (measured at DC)

5. Minimum clearances:

• 7m to grounded objects

• 10m to other HV equipment

Maintenance Protocol

Compliance Standards

• IEC 60060-1:2010 (High-voltage test techniques)

• IEEE Std 4-2013 (Standard for HV testing)

• IEC 61869-11:2018 (Instrument transformers)

• GB/T 16927.1-2011 (Chinese HV test standards)

Critical Requirement: Requires ≥50MΩ input impedance measuring instruments due to 30pF capacitance. Strictly observe 60-minute cooldown after 180-minute operation.