750KV/30pF SF6 Capacitor Voltage Divider

This state-of-the-art ultra-high voltage measurement device delivers unprecedented ≤2pC partial discharge performance with dual-frequency capability, designed for 800KV-class transmission systems and advanced research applications.

Technical Specifications

Innovative Design Features

Dual-Frequency Operation

• 50Hz for fundamental power measurements

• 200Hz for 4th harmonic analysis

• Precision-engineered frequency response

PD Suppression Technology

• Five-stage graded shielding

• Ultra-smooth surfaces (Ra<0.2μm)

• Active SF6 gas conditioning system

• Integrated Faraday cage

Typical Applications

UHV Transmission

• 800KV line voltage monitoring

• Grid synchronization measurements

Research Facilities

• Reference standard for calibrations

• Harmonics analysis up to 200Hz

GIS Diagnostics

• Partial discharge mapping

• Insulation condition monitoring

Installation Requirements

1. Climate-controlled environment (±3°C stability)

2. Maintain SF6 pressure at 0.65±0.02MPa (at 20°C)

3. Use quad-shielded coaxial cables (min 15mm diameter)

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

5. Minimum clearances:

• 5m to grounded objects

• 8m to other HV equipment

Maintenance Protocol

Compliance Standards

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

• IEC 60270:2015 (Partial discharge measurements)

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

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

Critical Requirement: Requires minimum 20MΩ input impedance measuring instruments due to 30pF capacitance. For ≤1pC measurements at 550KV, must use fully shielded test enclosure.