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.