1. Increased transformer insulation stresses are due to _______________ a) third harmonic currents b) third harmonic voltages c) fifth harmonic currents d) fifth harmonic voltages AnswerAnswer: b [Reason:] Following are the effects due to third-harmonic voltages: Increased transformer insulation stresses, electrostatic charging of adjacent lines and telephone cables, possible resonance at third-harmonic frequency of transformer…
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