Contributions concerning the clock hour figure mathematical model graphical defining through the trivalent variable of Lagrange matrix

The mathematical model of a three-phase transformer clock hour figure can be expressed in the simplest form by a 3×3 square matrix called matrix code and authors, wishing to emphasize its origin, propose the association with the term: CEUS matrix. The initial mathematical model can be expressed by a code equation or, in graphical form, through a code graph. Interrelated with the mathematical model graphical form, expressed through the defining matrices: M₁₀₀, M₁₀, M₁ or through the transfer matrix T. In relation to those in the authors propose a more general definition, obtained through the Lagrange matrix L, with a more extended utilization compared with M₁₀₀, M₁₀, M₁ and T matrices. The end of the paper presents the conclusions related to a new variant of clock hour figure definition.