33kV High Voltage Vacuum Circuit Breaker for Power Distribution Systems

We've been moving these 33kV units for years now, and what most buyers don't realize at first is how much you can tailor the setup—we've done custom mounting brackets, modified control wiring diagrams, even specific labeling for their internal tracking systems, so it's not just a one-size-fits-all box you're stuck with.

It handles 1250A continuous current, and the breaking capacity sits at either 25kA or 31.5kA depending on your fault level requirement, which is pretty standard for medium voltge distribution work, but the vacuum interrupter gives you that quick arc extinction without the SF6 gas hassle.

The spring-operated mechanism gives you about 10,000 mechanical operations before you need to think about anything, though the electrical life at full load is only around 100 breakings—so if you're doing frequent switching under load, you'll want to factor that in, it's just a limitation of the contact wear.

Ambient temperature range is -15°C to +40°C, and it's altitudes up to 1000m, but we usually have stock for most standard configurations, just confirm lead time if you need a non-standdard voltage tap (11kV or 22kV are options too).

When you order, you get the breaker itself with the overcurrent, short-circuit, and earth fault protection functions built in, plus the CE and CCC certifications on file—the weight varies from about 150kg to 300kg depending on model and any custom additions you request.

Anyway, it's not suited for outdoor instalation without an enclosure, and the 31.5kA breaking capacity is better for industiral plants than smaller substations where 25kA usually does the trick.