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Stocked in our main warehose, usually ships within 7 working days, but confirm lead time for 3150A units—those are built to order in roughly 4 weeks. We package them on heavy-duty pallets with foam inserts, so no cold chain needed here, it's purely mechanical.
It's basically a workhorse for 24kV distribution, the vacuum arc-extinguishing keeps contact wear minimal, and the E2 electrcial life means you're not swapping it out every few years. Most buyers I've dealt with go with the 1250A version for substation feeders, unless you're feeding a large industiral load.
Teh withdrawable design is what makes it worth buying—pulling it out for inspection takes minutes, no need to disconnect cabling from the KYN panel. Phase-to-phase distance is 275±2mm, which is tighter than some older gear (make sure your busbars can handle it).
One concrete detail: the energy-storage mechanism spring is loud when it charges—sounds like a heavy latch clicking—so don't mount it near a quiet office. It's not suited for high-moisture environments without a heater, vacuum bottle itself is sealed but the mechanism can corrode.
Breaking capacity is 31.5kA at 24kV, and the peak withstand is 80kA, so it handles fault currents better than most 12kV units we see. Operating sequence is O-0.3s-CO-180s-CO, which means it can reclose fast enough for most auto-reclose schemes—check if your relay expects a slower cycle (some do).
Also, the mechancial life is 20,000 operations, but that's under test conditions—real-world switching with heavy loads might drop that by 10-15% or so. We've had good feedback from utilities running them in secondary substations, though one buyer mentioned the arc chamber can get warm during sustained faults (2000A+ for over a minute).
We typically require a minimum order of 5 units for the VS1-24 model. If you need fewer for a trial, we can discuss that on a case-by-case basis.
Lead time is usually 30 to 45 working days from order confirmation, depending on current production load. We'll confirm exact timing once we receive your PO.
Yes, we supply the type test certificates for IEC 62271-100:2021 compliance, including the power frequency and lightning impulse withstand tests. These come with the breaker to support your project documentation.
No, the VS1-24 is fixed at 1250A or 3150A rated current based on your selection. We don't offer intermediate values for this model, but we can recommend other series if you need a different rating.
Store it in a clean, dry indoor space with temperature between -25°C and +55°C, and relative humidity below 90%. Keep it in its original packaging to avoid dust and moisture buildup on the vacuum interrupter.
