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Protection schemes are used for electric power transformers. Name at least three different types of transformer protective schemes (by function) and explain briefly their principles of operation.
Problem 3 a- List five different transformer types used in the electric power system. [5 points] Consider a three-winding transformer, as shown in Figure 1, with the following particulars Ze 0.01+j 0.08 V2-440 z,= 0.01 tj 0.08 2-100/-25 Z- 0.01 +j 0.08 s-80/-35° Assume that V2 is the reference phasor, calculate: (a) The intermediate voltage Vo (3 points) (b) The primary current l and the primary voltage V. (3 points) (c) The tertiary voltage Vs referred to the primary side....