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

Rockwill

17yrs 700++ staff 108000m²+m² US$150,000,000+ China

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

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.

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.

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:

High Fire-Risk Environments: Substations bordering forests (wildfire zones), dry grasslands, or industrial areas.
Urban & Critical Infrastructure: Dense city centers, hospitals, data centers, airports – where fire must be prevented at all costs.
Regulatory Sensitive Areas: Locations with strict fire codes, environmental protection zones, or mandated SF₆ phase-out.
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.