Product introduction
The Aierway 40.5kV Center Distance 400mm (Standard Pole) represents a specialized, compact configuration of medium-voltage switchgear designed specifically for pole-mounted or compact ground-mount applications in 40.5kV distribution networks. The defining feature—a 400mm phase-to-phase (center-to-center) busbar distance—signifies an optimized, space-saving design that maintains full electrical performance for standardized installation footprints. This product is ideal for extending distribution networks, branching lines, or connecting distributed energy resources where space is constrained.
Key Features
1.Primary Switching Device: Usually integrates a **3-position SF₆ gas-insulated Load Break Switch (LBS)** with Make, Break, and Earth functions. Some variants may incorporate a Vacuum Circuit Breaker (VCB) for full fault interruption capability in the same compact footprint.
2.Modular Bay Design: Each unit typically functions as a single bay (e.g., one incoming or outgoing feeder). Multiple units can be bolted together side-by-side on a common frame to form a complete ring main or switching station, maintaining the consistent 400mm center distance.
3.Maintenance-Free Operation: No internal maintenance required for the sealed-for-life primary compartment.
4.Enhanced Safety: Fully grounded metal enclosure with no exposed live parts.
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 ~ 30μΩ |
| Contact Self-Closing Force | 200±60N |
| 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 |




