Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Chapter 29, Problem 6R
What load may be used for an electric range rated at not over 12 kW? (Table 220.55) _____
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please show working and an explanation. The ans is 20.68 ms.
A 400V,50Hz,Y-connected, 4-pole,three-phase wound rotor induction motor, the rotor circuit is Y-
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165 V. If the total stator losses are 650 W,find:airgap power, rotor copper loss, input power, developed
(or gross) mechanical power, output power, efficiency, if friction and windage losses are 377W?
consider the circuit below. Assume it uses ideal diodes with the details specified above. the left side of the circuit is basically a wheatstone bridge, hooked to the right side, which is a differential op amp. a) what is the voltage between junctions "A" and "B" if R2 is 201 ohms? b) what are the minimum and maximum values of R2 can be without the op amp hitting saturation?remember that for the diodes to be ideal you they have to have a turn on voltage of 0.6 volts.
Chapter 29 Solutions
Electrical Wiring Residential
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- The capacitors in the circuit shown below have no energy stored in them and then switch “S1” closes at time t=0. Assume the ideal op amp does not saturate. As stated above assume the diodes are ideal with parameters specified above. Diodes are at 0.6 Volts Show the derivations of the mathematical equations for v(t) at Locations A and B for t≥ 0arrow_forwardPhase (deg) Magnitude (dB) -20 -40 -60 -80 -100 ° -90 -180 -270 10-1 (i) ° Problem 5 Consider a unity (negative) feedback system with a proportional controller. The Bode plot of the plant transfer function G(s) is given as below. System: sys Frequency (rad/s): 1 Magnitude (dB): 13.9 System: sys Frequency (rad/s): 14.9 Magnitude (dB): 6.58 System: sys Frequency (rad/s): 1 Phase (deg): -9.76 10° System: sys Frequency (rad/s): 25.6 Magnitude (dB): -0.0703 System: sys Frequency (rad/s): 41.3 Magnitude (dB): -8.06 System: sys Frequency (rad/s): 200 Magnitude (dB): -44.4 System: sys Frequency (rad/s): 14.9 Phase (deg): -110 System: sys Frequency (rad/s): 25.6 Phase (deg): -148 System: sys Frequency (rad/s): 41.3 Phase (deg): -180 System: sys Frequency (rad/s): 200 Phase (deg): -247 101 Frequency (rad/s) 102 Find the gain crossover frequency, phase crossover frequency, gain margin and phase margin of the system. Is the closed-loop system stable? (ii) What is the steady-state error of the…arrow_forwardsolve and show in detail all calculationsarrow_forward
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- A 3-phase, 52 H.P, 50 Hz, 6-Pole, Y- connected induction motor runs at a speed of 980 rpm.The motor is supplied from 380 V mains and it takes a rated current of 80 A at 0.8 p.f. If the total stator losses are 1.7 kW, determine: the air-gap power, rotor copper loss, friction and windage losses?arrow_forwardelectric plants do hand writingarrow_forwardplease solve quickly. thank you!arrow_forward
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