12kV, 1250A, 31.5kA Vacuum Circuit Breaker (VCB). It is a medium-voltage electrical switchgear device, specifically designed in a withdrawable (or “draw-out”) chassis format for installation in metal-clad switchgear cabinets. The unit features a robust white metal enclosure housing the operating mechanism, while the front panel clearly displays standard operational indicators—a green button for the “open” (trip) position and a red button for the “close” position. On the rear side, three prominent red, epoxy-resin-cast pole columns house the vacuum interrupters. These poles are equipped with multi-layer petal-style primary contacts designed to engage with fixed busbars in the switchgear panel. The bottom of the unit is mounted on a sliding rail system with guide pins and locking mechanisms, allowing for safe and efficient connection or isolation from the main power grid without dismantling the equipment.
