Answered: From the circuit diagram of power…

From the circuit diagram of power measurement using two wattmeter for delta connected load in experiment No.2, the instrument used to measure the input voltage from the supply is

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter26: Three-phase Circuits

Section: Chapter Questions

Problem 8RQ: If the load in Question 7 is connected in a wye, what would be the line voltage and line current...

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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

From the circuit diagram of power
measurement using two wattmeter for delta
connected load in experiment No.2, the
instrument used to measure the input voltage
from the supply is

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