1.Product Overview
          SF₆ gas-insulated switchgear (GIS) integrates circuit breakers (CB), disconnectors (DS), earthing switches (ES), current/voltage transformers (CT/VT), and busbars within SF₆-filled metal enclosures. Compliant with IEC 62271 series, its compact design leverages SF₆’s high dielectric strength (≈3× air) and superior arc-quenching capability (arcing time <15ms).

Key advantages:
          Environmental Resilience: IP67-rated for operation at -30°C to +40°C, ≤95% humidity, or altitudes up to 4,000m.
          Safety: Segregated gas compartments (individual gas zones per bay), leakage rate <0.5%/year (IEC 62271-303).
          Smart Grid Integration: Supports IEC 61850-9-2LE for digital substation interoperability.
          Eco-Friendly Options: SF₆/N₂ mixtures or alternative gases (e.g., C₅-PFK) to reduce GWP.

2.Primary Functions
          Circuit breaking/closing operations (per IEC 62271-100)
          Short-circuit current interruption & load switching
          Isolation and earthing (per IEC 62271-102/103)
          Condition monitoring (partial discharge, gas density, mechanical characteristics)

3.Product Functions
Electrical Performance
          Circuit Breaker: Puffer-type or self-blast interrupter, breaking time ≤3 cycles (60ms).
          Isolation/Earthing: Three-position switch (DS+ES) with mechanical interlocks (IEC 62271-102).
          Measurement/Protection: Rogowski coils (CT) or capacitive dividers (VT), accuracy class 0.2 (IEC 60044).

Smart Monitoring
          Gas Management: Density relays (alarm: 0.45MPa, lockout: 0.4MPa) + moisture monitoring (≤200ppm).
          Mechanical Diagnostics: Travel sensors for contact speed (±10% tolerance) and wear prediction.
          Partial Discharge Detection: UHF sensors (300MHz–1.5GHz) or TEV sensors (3MHz–100MHz).

4. Technical Parameters

5.Key Features
Technical Superiority
          Compact Footprint: Occupies 10%–30% space of AIS (e.g., 25㎡ vs. 100㎡ for 145kV).
          Maintenance-Free: Sealed design, maintenance interval ≥15 years (IEC 62271-301).
          Rapid Deployment: Modular pre-assembly reduces on-site installation time by 60%.

Safety & Sustainability
          Non-Flammable: Eliminates fire hazards (vs. oil-filled equipment).
          Low Noise: Operation noise <75dB (AIS typically >90dB).
          Eco-Compliance: Integrated SF₆ recovery unit (per IEC 60480).