Composite dry wall busing
Composite dry wall busing represent a significant advancement in high-voltage penetration technology. Designed to replace traditional oil-filled or porcelain bushings, these units feature a solid insulation system comprising an inner core of epoxy resin-impregnated fiberglass and an outer silicone rubber housing. This innovative construction delivers superior pollution resistance, seismic performance, and explosion-proof characteristics, aligning with the power industry’s demands for oil-free, compact, and environmentally friendly solutions – making them ideal for urban and rural grid modernization.
Core Technology & Advantages
Solid Composite Insulation:
Inner Insulation: Epoxy resin-bonded fiberglass tube provides exceptional mechanical strength (bending withstand: 1250 N) and dielectric properties.
Outer Insulation: High-temperature vulcanized (HTV) silicone rubber sheds offer outstanding hydrophobicity and superior pollution/flashover resistance compared to porcelain.
Key Benefits:
Oil-Free Design: Eliminates fire hazards and environmental risks associated with oil leakage.
Compact & Lightweight: Facilitates easier installation and reduces structural load.
High Reliability: Excellent resistance to seismic activity, thermal cycling, and UV degradation.
Low Maintenance: Silicone rubber sheds resist tracking and erosion, minimizing cleaning needs.
Product Model Designation
The model
FCGW-12/1250indicates:FCGW: Composite (F) Dry-Type Wall Bushing (CGW)12: Rated Voltage (12 kV)1250: Rated Current (1250 A)
Standard Technical Parameters
| Standard Technical Parameters | ||||||
|---|---|---|---|---|---|---|
| Specification / model | Rated voltage (kV | Rated current (A) | Allowable bending load (N) | Bending failure load(N) | Lightning impulse withstand voltage(kV) | Power frequency 1min wet withstand voltage (kV) |
| FCGW-12/250-1600 | 12 | 250～1600 | 625 | 1250 | 75 | 30 |
| FCGW-12/2000-4000 | 12 | 2000～3150 | 625 | 1250 | 75 | 30 |
| FCGW-24/630-4000 | 24 | 630～3150 | 625 | 1250 | 150 | 60 |
| FCGW-40.5/630-4000 | 40.5 | 630～3150 | 625 | 1250 | 200 | 80 |
| FCGW-72.5/630-1600 | 72.5 | 630～1600 | 625 | 1250 | 325 | 147 |
| FCGW-126/630-1600 | 126 | 630～1600 | 625 | 1250 | 550 | 230 |
Conclusion
Dry capacitor wall bushing (FCGW series) offer a robust, reliable, and maintenance-optimized solution for safely passing high-voltage conductors through walls, barriers, or tank enclosures in substations and switchgear. Their solid insulation technology, combined with the superior environmental performance of silicone rubber, makes them the preferred choice for modern power networks prioritizing safety, longevity, and grid resilience. Their standardized ratings and proven mechanical/electrical performance ensure seamless integration into new installations or retrofit projects.