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20kA breaking capacty at 1250A continuous rating on a 50Hz system—that’s the headline number, and what it means in practice is you can clear a serious fault without arc restriking, which is pretty much the whole point of a vacuum bottle in a fixed ACB.
Basically, the vacuum arc-extinguishing medium gives you minimal maintenance compared to oil or SF6, so you’re not pulling the unit every six months for contact inspection; we’ve seen these run 10,000 mechancial operations or so before the first service interval hits.
Overcurrent protection is built in, along with OVP and circuit-breaker failure backup, so if the primary trip fails to clear teh fault, the unit self-isolates—that’s a feature a lot of buyers don’t think about until they’ve had a cascade trip on a critical feeder.
ISO9001 covers the factory, but the actual short-circuit duration rating is 4 seconds at rated current, which is tighter than most Chinese breakers we’ve tested; you’ll want to confirm your system’s let-through energy (I²t) matches that window.
For ordering, MOQ is usually 3 units for the fixed 3-pole configuration, but our company can do single units if you’re replacing a failed one—lead time is typically 20 days or so, but check stock before you place because the 1250A frame is popular and we’ve had occasional backlogs.
Our MOQ is 10 units for this model, but we can do smaller trial orders if you're just testing the waters.
Standard lead time is around 30 days after order confirmation, but we can rush it to 20 days for an extra fee.
Yes, we include ISO9001 certificates with every order, along with the test reports for the breaking capacity and short circuit duration.
Absolutely, you can set the overcurrent trip point via the built-in electronic controller — it's adjustable within a range to match your system needs.
Keep it indoors in a dry, ventilated area with the original packaging, and avoid temperatures above 40°C or heavy dust. We also recommend checking the vacuum level every 6 months if stored long-term.
