12kv Withdrawable Vacuum Circuit Breaker Vsg-12 Vcb for Kyn28A Switchgear

Unlike embedded pole designs, the open-type insulating cylinder structure allows our technical team or field engineers to inspect the vacuum interrupter directly. If a single phase experiences electrical wear, the individual vacuum bottle can be replaced independently without discarding the entire pole assembly, lowering long-term maintenance costs.

Yes, this withdrawable vacuum circuit breaker is engineered to standard national dimensions. The drawout chassis layout matches the internal guide rails and secondary plug interlocks of air-insulated metal-clad switchgear with 800mm or 1000mm panel widths.

The device manages rated short-circuit breaking currents of 20kA, 31.5kA, or 40kA depending on configuration. It withstands rated short-time thermal currents for 4 seconds and peak dynamic currents up to 100kA under strict factory internal quality control.