A 11,000/6,600 V, 3 phase transformer has a star connected primary and a deltaconnected secondary. It supplies a 6.6kV motor having a star connected stator, developing 950KW at a power factor of 0.85 lagging and an efficiency of 90%. Calculate a. motor line and phase currents b. transformer secondary current c. transformer primary current
A 11,000/6,600 V, 3 phase transformer has a star connected primary and a deltaconnected secondary. It supplies a 6.6kV motor having a star connected stator, developing 950KW at a power factor of 0.85 lagging and an efficiency of 90%. Calculate a. motor line and phase currents b. transformer secondary current c. transformer primary current
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 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...
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A 11,000/6,600 V, 3 phase transformer has a star connected primary and a deltaconnected secondary. It supplies a 6.6kV motor having a star connected stator, developing 950KW at a power factor of 0.85 lagging and an efficiency of 90%. Calculate a. motor line and phase currents b. transformer secondary current c. transformer primary current d. if the transformer is rated 1.5 MVA, what is the maximum Hp of another motor with 90% efficiency can be added without overloading the transformer?
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