Rockwill's SF6 Circuit Breaker Solution for 33kV Substations in Nigeria Akwụkwọ SF6 Circuit Breaker nke Rockwill site na ọtụtụ eme 33kV na Naịjirịa

Background na Projeck​
Klimat na Nigeria, wanda yake da karamin jiki (jiki na farko na shekarar 35°C) da karamin ruwan zafi (≥80%), ya ba da abubuwa mai zurfi don hanyar tsari, kyauka da tattalin gas na kayan aiki. Rockwill ta kasance suka dogara substation na 33kV, wanda ya shiga cikin cin kawo karfin HV-type SF6 circuit breaker don kula da abubuwan da suka faru:

1. ​Riskota da Take Tsari: Ya fi girma tsarin take tsari saboda jiki da ruwa da ke fuskantar wasa.
2. ​Tsarin Gas SF6: Karamin ruwan zafi ya yi damar gas a gane da ruwa (da ke da damar), wanda ya haifar da kyauka.
3. ​Ashirin Aiki: Muhimmanci da ke da ≥6,000 daga cikin aiki masu inganci don kula da yanayin grid tun bankin capacitor.

​Kwamfuta da Zaɓe​

1. ​Samun Yadda a Kiyaye​
   • Koyarwa: Amfani da GBJ147-90 standards da koyarwar masana, tare da bayanai masu aiki.
   • Dakilanta: Crane na 16-ton don kiyaye mai ma'ana, tare da testowa masu insulata na porcelen (voltage na baya ≥33kV, voltage na rayuwa ≥170kV).
   • Kiyaye Conductor: Amfani da aiki na hydraulic crimping tools da ≤5% torque error don kula da resistance na aiki a jiki mai yawa.
2. ​Aiki na Vacuum da Tsarin Gas Mai Ma'ana​
   • Yadda a Samun Pipelines: Pipelines suka dogara su da alcohol na anhydrous; grooves na take tsari suka fito da silicone grease 7501 don kula da contamination.
   • Proses na Vacuum: Two-stage vacuum pumping to 133Pa, ya fara 8 hours, tare da 4-hour observation (≤1% fluctuation).
   • Gas Quality: SF6 moisture content verified (≤8ppm per cylinder) and post-filling chamber checks (≤150ppm). Leak detection via 1×10⁻⁶ sensitivity detectors.
3. ​Design na Yadda a Kiyaye wa Klimat​
   • Take Tsari Mai Ma'ana: Grooves na flange suka fito da adhesive na waterproof (-20°C~120°C) and reinforced with shaft retaining rings.
   • Anti-Condensation: Built-in humidity-controlled dehumidifiers (threshold: 70%) to prevent gas liquefaction.
   • High-Temperature Materials: Silver-plated copper-tungsten alloy contacts withstand arc temperatures ≥2,000°C (contact resistance ≤35μΩ).
4. ​Maintenance & Local Support​
   • Modular Maintenance: Detachable arc chutes enable rapid component replacement, minimizing downtime.
   • Local Training: Lagos-based technical center offers hands-on training in gas analysis, mechanical debugging, and more.
   • Smart Monitoring: Integrated pressure sensors and wireless modules track SF6 density, temperature, and operations, with auto-alerts for anomalies.

Abubuwan Da Suka Faru​

1. ​Reliability: Post-deployment annual failure rate <0.2%, supporting ≥10 daily capacitor switching operations.
2. ​Environmental Resilience: Passed 72-hour (45°C, 95% humidity), exceeding IEC 62271-203 sealing standards.
3. ​Cost Efficiency: 8-year maintenance cycles (vs. oil circuit breakers) and 30% lower lifecycle costs.

​Conclusion​
Rockwill's solution combines rigorous process controls (vacuum protocols, gas QA) and climate-adaptive innovations (waterproof seals, smart dehumidification) to overcome Nigeria's extreme conditions, setting a replicable benchmark for SF6 breaker applications in Africa. Future plans include SF6/N₂ hybrid gas technology to further reduce carbon emissions and operational costs.