6th Edition

ISBN: 9781259969683

Author: Alexander

Publisher: MCG

Concept explainers

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Videos

Textbook Question

Chapter 12.4, Problem 3PP

One line voltage of a balanced Y-connected source is V A B = 120 ∠ − 20 ° V . If the source is connected to a Δ-connected load of 20 ∠ 40 ° Ω , find the phase and line currents. Assume the abc sequence.

Answer: 6 ∠ − 60 ° A , 6 ∠ − 180 ° A , 6 ∠ 60 ° A , 10.392 ∠ − 90 ° A , 10.392 ∠ 150 ° A , 10.392 ∠ 30 ° A .

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 12.3, Problem 2PP

Chapter 12.5, Problem 4PP

Students have asked these similar questions

:A three-phase, three-wire, ABC system has effective line voltage 173.2 V. Wattmeters in lines A and B read -301 W and 1327 W, respectively. Find the impedance of the balanced Y-connected load. (Answer 10 angle -70° )

1. Three identical impedances of 10∟53.1o ohms are connected in delta to a threephase three-wire 240 volt ABC system. Find the line currents and the total power.2. A balanced star load with impedances of 6∟45o ohms is connected to a threephase, four-wire, 208 volt, ABC system. Find the line currents, the neutral current, the power per phase and the total power (S, P, Q).3. A 460- volt three-phase source supplies a balanced load of 200 kW at a lagging power factor of 0.707, and the two wattmeters are properly connected to measure the total power. Calculate a) line currents, b) reading of the wattmeters.4. In a balanced 230-volt three-phase circuit two wattmeters are connected to indicate power. If the readings are 8140 W and -2980 W, calculate the power factor and the line currents PLS ANWER THIS THIS IS MY LAST QUESTIONS I CANT ASK ANYMORE PLSS BEGGING TO THE EXPERT PLSSS

A 3-phase Y-connected source (400V) supplies a 3-phase Y-connected load (3xZload = 27 + 9.0 ohm) via a non-ideal, three-core cable. No neutral line is available. Each conductor of the cable has an impedance Zcable = 80 + 2.1 mOhm a. Measure the phase shift angle between line voltage and phase voltage. b. Because of a fault, one of the three load impedances changes to half its original value. What happens to the phase voltages at the load.

Chapter 12 Solutions

FUNDAMENTALS OF ELEC.CIRC.(LL)-W/ACCESS

Ch. 12.2 - Given that Vbn=22030V, find Van and Vcn, assuming...Ch. 12.3 - A Y-connected balanced three-phase generator with...Ch. 12.4 - One line voltage of a balanced Y-connected source...Ch. 12.5 - A positive-sequence, balanced -connected source...Ch. 12.6 - In a balanced -Y circuit, Vab=44015 and ZY = (12 +...Ch. 12.7 - For the Y-Y circuit in Practice Prob. 12.2,...Ch. 12.7 - Calculate the line current required for a 30-kW...Ch. 12.7 - Assume that the two balanced loads in Fig....Ch. 12.8 - The unbalanced -load of Fig. 12.24 is supplied by...Ch. 12.8 - Find the line currents in the unbalanced...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Solution Summary: The author explains how to find phase and line currents. Balanced Y-connected source phase voltage (I_AB) is 120°

Concept explainers

Videos

Want to see the full answer?

Chapter 12 Solutions