Product introduction
The Aierway 40.5KV Center Distance 400mm is a robust and reliable medium-voltage vacuum circuit breaker engineered for high-performance power distribution systems requiring enhanced dielectric clearance, superior thermal management, and extended operational life. With a 400mm phase spacing, this breaker provides optimal electrical isolation and mechanical stability for demanding applications in utility, industrial, and infrastructure environments.
Key Features & Technical Advantages
1. Enhanced 400mm Center Distance Design
– Optimal Dielectric Clearance: The 400mm phase-to-phase spacing ensures superior electrical isolation, reducing the risk of phase-to-phase flashover and enhancing system reliability under transient overvoltage conditions.
2. 40.5KV Rated Voltage Performance
– Compliant with international standards (IEC 62271-100, IEEE, GB) for 40.5kV/35kV systems.
– Suitable for primary distribution networks, large industrial complexes, and heavy-duty applications requiring high fault current interruption capability.
3. Solid-Insulated Modular Pole Design
– Epoxy-Resin Encapsulation:** Each phase is individually encapsulated in high-grade cycloaliphatic epoxy resin, providing:
– Complete environmental sealing (IP67 equivalent protection)
– Partial Discharge Performance:** Certified partial discharge levels <5pC at 1.2Ur, ensuring long-term insulation integrity.
Design Benefits
Safety & Reliability、 Operational Efficiency、 Environmental Compatibility
Main Technical Parameters
| Specification | Value |
|---|---|
| Rated Voltage | 40.5kV |
| Rated Current | 1250A, 1600A, 2000A, 2500A |
| Power Frequency Withstand | 95kV |
| Lightning Impulse Withstand | 185kV |
| Rated Frequency | 50 Hz |
| Rated Short-Circuit Breaking Current | 25kA, 31.5kA |
| Rated Short-Circuit Breaking Times | 30 Times |
| Rated Peak Withstand Current | 80kA |
| Rated Single Capacitor Bank Breaking Current | 630A |
| Rated Back-to-Back Capacitor Bank Breaking Current | 400A |
| Loop Resistance under Rated Contact Force | ≤25 ~ 30Ω |
| Contact Self-Closing Force | 200±60N |
Parameters of Matching Vacuum Switch
| Specification | Value |
|---|---|
| Contact Opening Distance | 20±1mm |
| Rated Over-Travel | 5±1mm |
| Average Opening Speed | 1.7±0.2m/s |
| Average Closing Speed | 0.75±0.2m/s |
| Rated Contact Force | 3100±200N, 3600±300N |
| Contact Closing Bounce Time | ≤3ms |
| Opening Contact Rebound Amplitude | ≤2mm |
