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It's not a lightweight unit by any means, so if you're working with tight space constraints or need something mobile, this isn't it — it's a fixed-insallation, three-pole breaker designed to sit in substations and transmission lines for years. What it does well is handle the heavy lifting at 252KV and 4000A rated current with a breaking capasity of 40KA, and we've seen it perform reliably from -30°C up to 50°C, so pretty much any outdoor climate works.
The SF6 gas is the core insulation here, kept at 0.40MPa with a tight ±0.015MPa window, and that arc-extinguishing medium lets it hit lightning impulse withstand values of 1050/1250KV. Most buyers go with the electric operation type because of that it integrates cleanly into automated systems, and the mechanicla life is roughly 6,000 to 10,000 operations depending on maintenance — we usually have stock built up, but confirm lead time on bulk orders (give or take 20 days).
You get ISO9001 and CCC certification on every unit, so compliance isn't a headache, and the power frequency withstand voltge at 460/605KV means it's built for real-world stress, not just lab conditions. 40KA short-time withstand current ties into that — basically, it can take a hit and stay intact, which is critical for substation protection where faults happen fast.
It's better than many alternatives for high-altitude installations, up to 3,000 meters, though anything above that and you'll need to check derating curves. (We don't have perfect data for extreme altitudes, so ask if that's your scenario.) The relative humidity tolerance goes to 95% daily average, and that holds up in coastal or humid regions without degradation.
Shipping these units involves crating fixed structure separately from teh poles — we send them with individual COAs and packed to avoid SF6 leaks during transit. Order quantities usually start at 1 unit, though pricing drops noticeably at 5 or more, which is what utility-scale buyers tend to hit.
Our MOQ is typically 1 unit for standard models like the LW-252, but we can discuss bulk discounts if you need multiple breakers for a project.
Lead time runs around 30-45 days from order confirmation, depending on current production load. We can expedite for urgent orders if needed.
Yes, we include ISO9001 and CCC certificates with every shipment. You'll get the full set of quality docs, including test reports for the 40KA breaking capacity and voltage withstand levels.
The 3000m max altitude is the standard rating. If you need it for higher altitudes, we can customize the breaker with adjusted SF6 gas pressure to maintain performance.
Yes, it comes pre-filled with SF6 at 0.40±0.015MPa pressure. Store it indoors in a dry, clean area with temps between -30°C and +50°C, and keep it upright to avoid gas leaks.
