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Gas Insulated Divider

600KV/750pF SF6 Hybrid Capacitor: Ultra-HV Divider & Power Line Coupler with ≤2pC PD

Industrial 600KV/750pF SF6-insulated dual-role device combining precision voltage measurement (±1% accuracy) and power line coupling, featuring ≤2pC partial discharge and 25-300Hz wide-frequency operation.


  • US$1.00; Negotiated Price
  • Lead time: 120days

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Product Details

Product Tags

600KV/750pF SF6 Hybrid Capacitor Voltage Divider & Coupling System

This breakthrough EHV device delivers dual functionality as a precision voltage measurement divider and power line communication coupler, engineered for 500KV+ transmission systems with industry-leading ≤2pC partial discharge performance.

Technical Specifications

ParameterSpecificationTechnical Significance
Rated Voltage600KVDesigned for 550KV systems with 9% margin
Capacitance750pFOptimized balance between measurement loading and PLC coupling
Frequency Range25-300HzWideband operation for power quality analysis
Voltage Ratio2000:1High-ratio measurement for EHV protection
Accuracy≤±1%Class 1 measurement precision
Partial Discharge≤2pC @600KVUltra-low noise for sensitive measurements
Dielectric Loss<0.5%Efficient signal transmission
Temp Coefficient<0.0005Stable across -40°C to +85°C
Overvoltage660KV for 60s110% rated voltage withstand
Operation Time20 minutes continuousDesigned for intermittent testing

Dual-Function Engineering

As Voltage Divider

  • 25-300Hz wide-frequency response

  • 2000:1 ratio for EHV system protection

  • ≤2pC PD enables sensitive measurements

As Coupling Capacitor

  • 750pF optimized for carrier signal injection

  • Low-loss design (<0.5%) maximizes PLC efficiency

  • SF6 insulation prevents corona interference

Partial Discharge Innovation

  • Quadruple-Shield Design: Special electrode configuration minimizes discharges

  • Surface Treatment: Mirror-polished surfaces (Ra<0.5μm)

  • Gas Purity System: Integrated SF6 filtration maintains low PD

  • Measurement Impact: Enables detection of minute insulation defects

Installation Requirements

  1. Foundation vibration limit <0.05g (ISO 10816-3 Class A)

  2. Maintain SF6 pressure at 0.58±0.02MPa (at 20°C)

  3. Install with:

    • Quad-shielded measurement cables

    • Impedance matching network for PLC

  4. Clearance distances:

    • 4m to grounded structures

    • 6m to other HV equipment

Maintenance Protocol

IntervalProcedureAcceptance Criteria
Pre-useGas pressure verification0.56-0.60MPa
WeeklySurface contamination checkNo visible particles
MonthlyPartial discharge test≤2pC @600KV
QuarterlyCapacitance verification750pF ±1%

Compliance Standards

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

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

  • IEEE C93.3-2020 (Power line carrier coupling)

  • GB/T 4109-2020 (Chinese HV capacitor standards)

Essential Requirement: For PD measurements ≤2pC, must use fully shielded test environment (metal enclosure recommended) and fiber-optic measurement links to eliminate interference.

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