In two-wattmeter method, the readings of the wattmeter will be identica load in one of the two phases is zero power factor is unity neutral is earthed Power factor is 0.5

Q: A wye connection load has a voltage of 480v applied to it. What is the voltage dropped across each…

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Q: What would be the same results of this quesiton if the circuit was single phase 1000v?

A: If True power is single phase i.e.,P1ϕ=10kWV1ϕ=1000VI1ϕ=12.33 A

Q: Calculate the actual current 1₂ for this following line diagram: SB 100 MVA. 30 60 Hz 13.8 kV T1 30…

A: Given line diagram is,Asked to find the current I2=?

Q: 12. The sequence components of phase a current are zero sequence current = 0.47 +j1.49, positive…

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Q: Q1. For 'Load at Unity Power Factor' example discussed in the lecture (see figure below), find power…

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Q: Find the current through each resistor USING KIRCHHOFF'S LAW. Use Cramer's Rule.

A: Redraw the given circuit by resolving currents I3 and I6 in terms of Ix as follows. Figure 1

Q: Refer to the circuit below IF 2₁₁ = 39 + 17, 2₁ = 1+j1 A "N 240/0 (1) 240/120 1 240 L120 ZT ZT B ZT…

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Q: The magnitude of all the positive sequence currents will be a. 0.5+j0.866 b. unequal c. Unity = 1 d.…

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Q: Problem 3 A three-phase short-circuit occurs at F in the system reactances are all in percent.…

A: In this question, find the short circuit MVA rating if fault occured at the point F.  Short circuit…

Q: Generator Load I Load 2

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Q: 12 10A 20A

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Q: Calculate the individual inductive reactance, the total inductive reactance, and total current for…

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Q: An alternating current completes 5 cycles in 8 ms. What is its frequency?

A: Number of cycles = 5 Time = 8ms

Q: Question: For the basic chopper circuit Edc= 50 V, R= 80 ohms, duty cycle is 30% then the average…

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Q: The power input measurement to a synchronous motor is done using the two- wattmeter method. Each of…

A: This question belongs to measurements and instrumentation . It is based on the concept of two…

Q: A tree-phase generator has a load 100 kw per phase at a power factor 80 percent,lagging what is the…

A: The active power consumed by a 3ϕ load is equal to the sum of active power consumed by each load.…

Q: A 13.2KV, 60H2 Single phase lina Connects a Substahon o an resistunce Tha line Voltape is l.5 kV and…

A: Consider that the line voltage is V and line  current is  I, the active power, reactive power and…

Q: 10. Naghsh-Jahan Generation owns three generating units that have the following cost functions: Unit…

A: The generation cost is minimum when the incremental fuel cost of all the units are equal i.e.…

Q: The voltage-flux adjustment of a certain single phase 220 V induction watthour meter is altered so…

A: Given: Supply voltage, V = 220 V The meter is altered so that phase angle between flux and applied…

Q: Problem 3 Circuit Element 3 C =20 [µF] rad w =2000 + What is the magnitude of the impedance of this…

A: Here, we have given a circuit, where we can see that the circuit consists of a capacitor only. So,…

Q: Determine the power factor of the source. R = 6 Ohms

A: The given circuit diagram is shown below,Here, the value of R is 6 ohms.So,

Q: Consider the following circuit, the value of Ris 2 220V f=50HZ Draw the power triangle indicating…

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Q: Two generators operated in parallel in a generating station, as generator A has 20 KVA, 20KV, 5% ,…

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Q: The unit for three phase apparent power is Select one: O a. KW O b. V O C. KVA O d. KVAR

A: The apparent power is defined as the combination of the reactive power and the true power and is…

Q: Differentiate between Single Phase Three Wire and Two Phase Three Wire.

A: In this question we will differentiate between single phase three wire and two phase three wire…

Q: Obtain the symmetrical components of a set of unbalanced currents Ia=1.28ے250, Ib=0.567ے1800 and…

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Q: The reactance of a generator is given as 0.55 pu based on the generator of 21 KV, 350 MVA. Determine…

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Q: The variable AC voltage available from the power module is a (A) single-phase (B) 2-phase balance…

A: Variable ac voltage is the output of a variac transformer. To meet the load requirements various…

Q: Question: An individual consumer has a load pattern of 2000KW 0.8lag for 12hr and 1000kW unity power…

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Q: low voltage systems In the circuit in the figure, the effective value of the voltage source is V,…

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Q: Use the node voltage method to find the fault at node 2. Voltages before fault: V₁ = 8027.1∠0. 685°…

A: before fault, the voltage at node 1 and node 2,

Q: In class B chopper, which of the given statement is true The power flows always from load to source…

A: The power flows always from load to source

Q: Problems: Fl- A 500 V dc generator supplies a load 800 A at point A through 0.025 2 distributor and…

A: Let the required current be i 500-VA0.025=800+i⇒i=500-VA0.025-800

Q: State two (2) disadvantages of wind turbine

A: The wind turbine is used to produce electrical energy. The equipment for producing wind energy is…

Q: An electrodynamometer type wattmeter is used to measure power in 1-o circuit. The connected load…

A: The solution is given below

Q: A voltage and current applied to a single phase load is  v= 25 sin (300t+30)  and i= 18 sin (250t-…

A: According to question we have to find,  Phase angle, active power, reactive power.

Q: 72. In 132 kV system, the phase to ground ca- pacitance is 0.01 µF and inductance is 6H. The voltage…

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Q: Find the equivalent resistance seen by the generator 10v. IG +. 10V 30Ω 122 in + Vo 72 my

A: In this question , we will find resistance seen from source..

Q: 3. The following are the symmetrical components sequence of phase B current: Positive = 10 cis 45…

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Q: A three phase power system has a fault level of 500 MVA and Sg = 100 MVA at a 132 kV busbar. What is…

A: Given, A three phase power system has SB=100 MVAVB=132 kV Fault level is 500 MVA.

Q: 1. Find the average power drawn by each charge. Total average power drawn by the load Find. 2. Find…

A: Node: The meeting point of more than two branches in a circuit is referred as a node. KCL: According…

Fault Analysis

In an electrical engineering system, a fault is an abnormal electric current flowing through the system, and fault analysis is the study of these faults. For instance, a short-circuit is a fault where the live wire touches the ground or neutral wire. If a circuit is interrupted by a failure of a current-carrying wire then an open circuit fault occurs. The open-circuit faults are also called series faults. One or more phases or ground may be involved in a three-phase fault or may occur only between two phases. Current flows into the earth in case of a ground fault or earth fault. For most situations, the prospective short circuit current of a fault that is predictable can be calculated. To limit the loss of service because of a failure, the protective devices can detect fault conditions and operate circuit breakers and also other devices. All phases equally can be affected in a poly-phase system which is known as symmetric electrical fault. The asymmetric fault becomes more complicated to analyze if only some phases are affected. By using methods such as symmetrical components, the power system analysis of these types of faults is often simplified. The main objective of power system protection is to design, detect, and interrupt power system faults.