A 50 MVA, 60 Hz, single-phase transformer indicates that it has a voltage rating of 8 kV/78 kV. Open circuit test and short circuit test gave the following results: OC Test: 8 kV, 61.9 A and 136 kW; SC Test: 650 V, 6.25 kA and 103 kW. Determine the voltage regulation if the transformer is operating at rated voltage and a load of 0.9 pf lagging. *

A 50 MVA, 60 Hz, single-phase transformer indicates that it has a voltage rating of 8 kV/78 kV. Open circuit test and short circuit test gave the following results: OC Test: 8 kV, 61.9 A and 136 kW; SC Test: 650 V, 6.25 kA and 103 kW. Determine the voltage regulation if the transformer is operating at rated voltage and a load of 0.9 pf lagging. *

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 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...

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Concept explainers

Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

Question

Electrical Machines 2

TRANSFORMER TESTS
A 50 MVA, 60 Hz, single-phase
transformer indicates that it has a
voltage rating of 8 kV/78 kV. Open
circuit test and short circuit test gave
the following results: OC Test: 8 kV,
61.9 A and 136 kW; SC Test: 650 V,
6.25 kA and 103 kW. Determine the
voltage regulation if the transformer
is operating at rated voltage and a
load of 0.9 pf lagging. *

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