Core Structural Features
Vacuum Interrupter as the Core Component:Maintains an internal high-vacuum environment (pressure < 10⁻⁴ Pa) and utilizes copper-chromium (CuCr50) alloy contacts. It offers high resistance to arc erosion, rapidly extinguishes arcs within 15–30 milliseconds, and supports breaking currents of 20–50 kA.
Fully Enclosed Post-Type Structure: The upper porcelain housing contains the vacuum interrupter, while the lower housing serves as an insulating support. All three phases are mounted on a sealed, rainproof mechanism enclosure; the overall design is compact, with a total unit weight of only 80–150 kg.
Weather-Resistant Insulation System: Employs silicone rubber composite insulators or outdoor solid epoxy resin insulation. It features a specific creepage distance of ≥25 mm/kV and offers resistance to temperature extremes, UV radiation, and pollution flashover, making it suitable for Class III pollution environments.
Electrical Performance Characteristics
Eco-friendly, Oil-free, and SF₆-free Design:Uses a vacuum as the medium for arc quenching and insulation, completely eliminating fire and explosion risks associated with oil or gas filling. It produces no pollutant emissions and meets environmental standards.
Stable Breaking Performance: Supports rated voltages of 12 kV, 24 kV, and 40.5 kV, and rated currents from 630 A to 3150 A. Short-circuit breaking capacity reaches up to 50 kA, with a breaking operation count far exceeding that of traditional oil circuit breakers.
Long Mechanical Lifespan: Mainstream spring operating mechanisms offer a mechanical lifespan of over 10,000 operations, while permanent magnet mechanisms can reach up to 100,000 operations. They feature high synchronization between opening and closing, with an opening rebound of ≤2 mm.