Consider a 3 phase 25 kVA, 440 V, 60 Hz ac generator operating at full load (that is, delivering its rated kVA) under balanced steady state conditions. The ac generator has 3 stator windings that output balanced 3 phase voltages. It is usual to assume that the 440 V refers to the rms value of the line-to-line voltage.
a) Find the magnitude of the generator line current if you also know that the stator windings are connected in Y
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b) Find the magnitude of the generator line current if you also know that the stator windings are connected in ?.