PHASE CONVERSION 217 the monocyclic quadrature voltage, $Q = CD, and current, J0. Denoting then: E = e = supply voltage, AB, and / = supply current, and EI, jB2 = voltages, /i, JT2 = currents in the two sides of the monocyclic square. It is then, counting voltages and currents in the direction indicated by the arrows in Fig. 67: #2 + Ei = e, hence: 2 ' and: substituting: into (3) gives: (i) (2) (3) (4) substituting (2) into (5) gives: (5) (6) substituting (6) into (2) gives: IL.+Z') F2 4- 2 I _ + Fz + 2 (7)