In a practical power system design, satisfactory operation is achieved when the voltage drop is O greater than 7% but less than 10% O greater than 5% O less than 5% O greater than 10% but less than 15%

In a practical power system design, satisfactory operation is achieved when the voltage drop is O greater than 7% but less than 10% O greater than 5% O less than 5% O greater than 10% but less than 15%

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter1: General Information For Electrical Installations

Section: Chapter Questions

Problem 13R: A junction box on a piece of European equipment is marked 200 cm3. Convert this to cubic inches....

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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.

Question

In a practical power system design, satisfactory
operation is achieved when the voltage drop is
O greater than 7% but less than 10%
O greater than 5%
O less than 5%
O greater than 10% but less than 15%

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