Barmac B6150SE VSI, 150 KW WEG Motor, 50 Hz, 1480 RPM, Like New Condition. Equip yourself with the gold standard. Manufacturer Brochure Information. The Barmac B-Series VSI is unique due to its crushing process. Whereas most other types of crusher use metallic parts to crush rock, the Barmac VSI uses the rock fed into the machine to crush itself.