The 24kV Center Distance 310mm Draw-Out Type Embedded Pole is a premium insulation solution tailored for indoor medium-voltage circuit breakers. Designed for current ratings of 630A, 1250A, and 1600A, it features vacuum interrupters encapsulated in high-grade epoxy resin, delivering excellent dielectric and thermal endurance. Its draw-out structure facilitates fast replacement and maintenance within switchgear trolleys, making it ideal for urban distribution networks, industrial power systems, transportation infrastructure, and renewable energy applications.
| Rated Voltage | 24kV |
| Rated Current | 630A, 1250A, 1600A |
| Rated Frequency | 50Hz |
| Rated Short-Circuit Breaking Current | 25kA, 31.5kA |
| Rated Short-Circuit Breaking Current Breaking Operations | 30 times |
| Rated Short-Circuit Making Current | 125kA |
| Rated Peak Withstand Current | 31.5kA |
| Rated Short-Time Withstand Current (4s) | 25kA, 31.5kA |
| Rated Single Capacitor Bank Breaking Current | 630A |
| Rated Back-to-Back Capacitor Bank Breaking Current | 400A |
| Short-Time (1min) Power Frequency Withstand Voltage | 65kV/79kV |
| Lightning Impulse Withstand Voltage (Peak) | 125kV |
| Circuit Resistance under Rated Contact Pressure | ≤25~30Ω |
| Mechanical Life | 10,000 times |
| Contact Self-closing Force | 110±60N |
| Contact Reaction Force at Rated Opening Distance | 180±50N |
| Permissible Contact Wear Thickness | 3mm |
| Storage Period | 20 years |
| Partial Discharge | ≤5pC |
| Rated Operating Sequence | O-0.3s-CO-180s-CO |
| Contact opening distance | 12±1mm |
| Rated overtravel | 3.5±0.5mm |
| Average opening speed | 1.1±1.7m/s |
| Average closing speed | 0.8±1.2m/s |
| Rated contact pressure | 2500±200N、3200±200N |
| Contact closing bounce time | ≤2ms |
| Contact opening and closing phase difference | ≤2ms |
| Opening contact rebound amplitude | ≤2mm |
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