| Customization: | Available |
|---|---|
| Application: | High-voltage |
| Material: | Porcelain |
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Wall bushings are specially engineered feedthrough devices that enable safe electrical conductor passage through walls, ceilings, or grounded barriers in substations. They provide:
Voltage Isolation: Barrier-to-conductor insulation
Environmental Sealing: IP68-rated moisture/contaminant exclusion
Mechanical Support: Conductor stabilization under short-circuit loads
| Application | Voltage Range | Typical Configuration |
|---|---|---|
| GIS Substations | 72.5kV - 1100kV | SF6-to-air interface |
| Transformer Rooms | 36kV - 550kV | Oil-to-air transition |
| Cable Entry Buildings | 10kV - 245kV | Direct burial termination |
| HVDC Converter Stations | ±200kV - ±800kV | DC wall penetration |
| Parameter | Range | Standard |
|---|---|---|
| Rated Voltage | 36 kV to 1200 kV | IEC 60137 |
| BIL (Basic Impulse Level) | 170 kV to 3600 kV | IEEE C57.19.00 |
| Power Frequency Withstand | 50/60 Hz, 1 min | IEC 62271-203 |
| Partial Discharge | <5 pC at 1.2 Ur | IEC 60270 |
| Type | Advantages | Limitations |
|---|---|---|
| Oil-Impregnated Paper | • Proven reliability • Self-healing properties |
• Fire risk • Maintenance intensive |
| Resin-Bonded Paper (RBP) | • Zero maintenance • Explosion-proof |
• Higher initial cost • Limited repairability |
| Silicone Composite | • Lightweight • Superior pollution performance |
• UV degradation risk • Lower mechanical strength |
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