The 24kV Center Distance 310mm Fixed-Type Embedded Pole is a vital insulating component designed for indoor medium-voltage vacuum circuit breakers. Rated for 630A and 1250A, this unit features integrated epoxy resin encapsulation of vacuum interrupters and conductors, ensuring superior dielectric strength and thermal stability. With a rated breaking capacity of 25kA and fixed mounting configuration, it offers reliable performance in power distribution networks, substations, and industrial power systems. Its compact and robust design supports ease of installation and consistent operational safety.
| Rated Voltage | 24kV |
| Rated Current | 630A, 1250A |
| Rated Frequency | 50Hz |
| Rated Short-Circuit Breaking Current | 25kA |
| Rated Short-Circuit Breaking Current Breaking Operations | 30 times |
| Rated Short-Circuit Making Current | 63kA |
| Rated Peak Withstand Current | 63kA |
| Rated Short-Time Withstand Current (4s) | 25kA |
| 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 | ≤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 |
| Contact closing bounce time | ≤2ms |
| Contact opening and closing phase difference | ≤2ms |
| Opening contact rebound amplitude | ≤2mm |
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