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Revolutionizing Outdoor Substation Safety: Fluorinated Gas-Insulated Current Transformer Solution

The Challenge:
In fire-sensitive environments like urban substations and forested areas, conventional ​SF₆-insulated or oil-filled outdoor current transformers (CTs)​ present critical risks: SF₆ is a potent greenhouse gas (GWP = 23,500), while mineral oil insulation carries inherent flammability hazards, increasing fire risk and environmental liability.

Our Solution: Low-Flammability Gas-Insulated Outdoor CT
We introduce a next-generation outdoor CT solution designed explicitly for ​fire risk mitigation​ and ​environmental sustainability, utilizing advanced ​Fluoronitrile/CO₂ blended gas insulation​ (GWP < 1,000; >90% reduction vs. SF₆).

Core Technology: Fire-Safe Gas Insulation

  • Fluoronitrile/CO₂ Blend:​ Replaces SF₆ and oil with an eco-friendly insulating gas mixture.
    • Ultra-Low Flammability:​ Significantly reduces ignition risk compared to oil-based systems and offers enhanced safety over traditional dry-air or SF₆ alternatives.
    • Exceptional Dielectric Strength:​ Maintains high insulation performance comparable to SF₆, ensuring reliable operation at high voltages under diverse weather conditions.
    • Low Global Warming Potential (GWP < 10% of SF₆):​ Critically reduces the climate impact of substation assets.
  • Sealed, Robust Tank:​ Engineered welded steel tank providing a permanent gas-tight enclosure, impervious to moisture, contamination, and long-term environmental degradation.

Key Features & Safety Systems

  1. Integrated Gas Management:
    • Continuous Pressure Monitoring:​ Real-time sensors track gas density within the CT core.
    • Automatic Gas-Replenishment:​ Active valves add pre-mixed gas from integrated reservoirs if pressure drops below operational thresholds, ensuring consistent insulation integrity without manual intervention. Eliminates sudden failures.
  2. Inherent Fire Risk Reduction:
    • Non-Flammable Insulation:​ Removes the ignition source represented by insulating oil.
    • Sealed System:​ Prevents internal arcing from causing external fires or explosions.
    • Metal Enclosure:​ Provides inherent fire resistance and containment.
  3. Lifecycle Sustainability:
    • Recyclable Components:​ Steel tank, aluminum conductors, and copper windings designed for >95% material recovery.
    • Eco-Gas:​ Supports utility decarbonization targets (ESG reporting).

Target Use Cases: High Risk = High Value

This solution delivers maximum impact in environments where fire poses unacceptable threats:

  1. High Fire-Risk Environments:​ Substations bordering forests (wildfire zones), dry grasslands, or industrial areas.
  2. Urban & Critical Infrastructure:​ Dense city centers, hospitals, data centers, airports – where fire must be prevented at all costs.
  3. Regulatory Sensitive Areas:​ Locations with strict fire codes, environmental protection zones, or mandated SF₆ phase-out.
  4. Hard-to-Access Sites:​ Remote locations where preventative maintenance or emergency response is logistically difficult and costly.

Benefits Summary

  • Fire Prevention:​ Dramatically lowers substation ignition risk through non-flammable insulation and sealed design.
  • Environmental Leadership:​ Eliminates SF₆ emissions and cuts carbon footprint significantly (Low GWP gas).
  • Operational Reliability:​ Continuous monitoring & auto-replenishment ensure 24/7 performance with reduced maintenance.
  • Reduced Liability:​ Mitigates fire-related operational, environmental, and reputational risks.
  • Future-Proof:​ Aligns with global regulations phasing out SF₆ and demanding sustainable grid infrastructure.
07/14/2025
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