Example 32.50. Resistances and Leakage reactance of 10 kVA, 50 Hz. 2300/230 V single phase distribution transformer are r, = 3.96 ohms, r, = 0.0396 ohms, x, = 15.8 ohms, x, = 0.158 ohm. Subscript I refers to HV and 2 to LV winding (a) transformer delivers rated kVA at 0.8 p.f. Lagging to a load on the LV. side. Find the H.V. side voltage necessary to maintain 230 V across Load- terminals. Also find percentage voltage regulation. (b) Find the power-factor of the rated load- current at which the voltage regulation will be zero, hence find the H.V. side voltage. %3D %3D (Nagpur University, November 1997) 10.000 020

Example 32.50. Resistances and Leakage reactance of 10 kVA, 50 Hz. 2300/230 V single phase distribution transformer are r, = 3.96 ohms, r, = 0.0396 ohms, x, = 15.8 ohms, x, = 0.158 ohm. Subscript I refers to HV and 2 to LV winding (a) transformer delivers rated kVA at 0.8 p.f. Lagging to a load on the LV. side. Find the H.V. side voltage necessary to maintain 230 V across Load- terminals. Also find percentage voltage regulation. (b) Find the power-factor of the rated load- current at which the voltage regulation will be zero, hence find the H.V. side voltage. %3D %3D (Nagpur University, November 1997) 10.000 020

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.65P: Reconsider Problem 3.64 with the change that now Tb includes both a transformer of the same turns...

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