Product introduction
The Aierway Embedded Poles 24kV is an advanced solid insulated switchgear (SIS) that utilizes epoxy resin-encapsulated (embedded) vacuum interrupter poles as its core insulation technology. This design represents the latest generation of medium-voltage switchgear, offering superior safety, compactness, and environmental sustainability for 24kV applications. The “Ejection” designation refers to its fully insulated, plug-and-play separable cable connectors that allow for safe, tool-less cable connection and disconnection.
Product Features & Benfits
1. Solid Insulation System
– Material: Cycloaliphatic epoxy resin with high tracking resistance.
– Design: Three-phase busbar and switching modules are individually encapsulated.
– Performance: Provides consistent dielectric strength over the entire service life.
2. Ejection-Type (Plug-and-Play) Cable Connection
– Fully Insulated Connectors: Rubber or silicone insulated, shielded separable connectors.
– Safe & Easy Operation: Connect/disconnect under visible earth position without tools.
– Test Points: Integrated test points for voltage indication and phasing.
3. Compact & Modular Design
– Significantly Reduced Footprint: Up to 50% smaller than air-insulated switchgear.
Technical data table 1
| Specification | Value |
|---|---|
| Rated Voltage | 24kV |
| Rated Current | 1250A |
| Power Frequency Withstand Voltage | 48kV/1min |
| Lightning Impulse Withstand Voltage | 75kV |
| Rated Frequency | 50Hz |
| Rated Short-Circuit Breaking Current | 40kA |
| Rated Short-Circuit Breaking Times | 30Times |
| Rated Peak Withstand Current | 100kA |
| 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 | 120±60N |
| Specification | Value |
|---|---|
| Contact Opening Distance | 9±1mm |
| Rated Over-Travel | 3.5±0.5mm |
| Average Opening Speed | 1.1±0.2m/s |
| Average Closing Speed | 0.8±0.2m/s |
| Rated Contact Force | 2500±200N, 3200±200N |
| Contact Closing Bounce Time | ≤2ms |
| Opening Contact Rebound Amplitude | ≤2mm |





