The WB5–WB9 series elbow plates are precision-molded insulation fittings crafted for 40.5 kV switchgear and transformer applications. Manufactured from high-performance epoxy resin, these elbow connectors deliver reliable insulation performance, exceptional arc resistance, and low partial-discharge characteristics, ensuring long-term operational safety and stability.
Available in multiple mechanical-strength variants, including models with reinforced bend capacity and extended creepage paths, the series meets the rigorous demands of high-voltage distribution networks. Their compact design and standardized interfaces streamline installation and maintenance, making them an ideal choice for utilities and industrial power systems.
| Model | Rated voltage | Maximum system voltage | Power frequency withstand voltage | Lightning impulse withstand voltage | Partial discharge | Surface arc resistance | Bending strength | Creep distance |
| WB5-40.5kv | 40.5kv | 45kv | 95kv/1min | 185kv | ≤5pC | ≥180 seconds | ||
| WB6-40.5kv | 40.5kv | 45kv | 95kv/1min | 185kv | ≤5pC | ≥180 seconds | ||
| WB7-40.5kv | 40.5kv | 45kv | 95kv/1min | 185kv | ≤5pC | ≥180 seconds | ||
| WB8-40.5kv/146 | 40.5kv | 45ky | 95kv/1min | 185kv | ≥146kN | ≥810mm | ||
| WB9-40.5kv/146 | 40.5kv | 45kv | 95kv/1min | 185kv | ≥146kN | ≥810mm |
