Dry Type Transformers. Accessories and Lugs. Single-Phase and Three-Phase. Lug Kits for QL Transformers. Frame Size: XV376. Typical Transformer Size: 3 ph - 150 kVA (3876). Primary Bus Bar Holes (Qty/Size): (1) .563 dia.. Secondary Bus Bar Holes (Qty/Size): (2) .563 dia..