Three identical coils are connected as delta load to a three phase supply. The line current drawn from the supply is 15 A and total power consumed is 75 kW. The kVA input to the load is 10 kVA. Please solve for: a. Line voltage b. Impedance per phase c. Reactance per phase

Three identical coils are connected as delta load to a three phase supply. The line current drawn from the supply is 15 A and total power consumed is 75 kW. The kVA input to the load is 10 kVA. Please solve for: a. Line voltage b. Impedance per phase c. Reactance per phase

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

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a. Line voltage

b. Impedance per phase

c. Reactance per phase

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