The CH1A–CH6A series 40.5 kV contact boxes are precision-molded epoxy components designed for modern medium-voltage switchgear. With multiple mounting and connection options—including two-hole, five-hole, ABB-standard, and three-way models—these boxes simplify layout integration and enable secure, reliable connections.
Built to excel under harsh conditions, the CH series maintains mechanical and electrical performance across a wide temperature span and high elevations. Their fully insulated, sealed construction and robust dielectric properties ensure long-term operational safety and minimal maintenance for critical power distribution systems.
| Model | Rated voltage | Rated current | Material | Power frequency withstand voltage | Lightning impulse withstand voltage | Operating temperature | Short-time withstand current | Ocean technology height |
| CH1A-40.5kv-A/B (two holes) | 40.5kv | 1600A/2000A | Epoxy resin | 95kv/1min | 118kv | -40 to +70 | 31.5kA/4s | ≤4000m |
| CH1A-40.5kv-A/B (five holes) | 40.5kv | 1600A/2000A | Epoxy resin | 95kv/1min | 118kv | -40 to +70 | 31.5kA/4s | ≤4000m |
| CHSA-40.5kv-A/E ( ABB) | 40.5kv | 1600A/2000A/2500A | Epoxy resin | 95kv/1min | 215kv | -40 to +70 | 31.5kA/4s | ≤4000m |
| CH5A-40.5kv | 40.5kv | 2000A/2500A | Epoxy resin | 95kv/1min | 118kv | -40 to +70 | 31.5kA/4s | ≤4000m |
| CH6A-40.5kv-550 (three-way) | 40.5kv | 2500A/3150A | Epoxy resin | 95kv/1min | 118kv | -40 to +70 | 31.5kA/4s | ≤4000m |
