Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1175
Fig. 5023-phase delta connection The three wires of a three phase system each act as amain wire, and a return wire for one of the others at thesame time. The actual current in the wire is the differenceof the two currents: in and outgoing. If the same three phase armature is connected first as aY…