What is the most important 2 reasons for using 3 phase electrical power systems

Q: 1. Why is there a wattmeter reading when the load is purely inductive? 2. Why is there no wattmeter…

A: The 1st question posted by you is incorrect .

Q: Lightning stroke is most common cause of current impulsive transients in power system. True False

A: Impulsive transients : It is defined as a sudden change in the electrical quantities such as Current…

Q: 1. How do you measure three phase line currents by using two current transformers? Draw the…

A: The diagram for the three-phase system and the two current transformers are drawn below, Consider…

Q: The recommended limit of voltage drop on a power circuit for a single-phase supply as per IEE Wiring…

A: The explanation is as follows.

Q: For the same voltage and current produced by a three phase and single phase source, the power…

A: In this question,  We need to choose the correct options Choose the given Statment is true or false?…

Q: The desired secondary voltage is 115 volts l, 3-phase, to monitor the voltage of 230 kV line and…

A:

Q: What are the three types of equipment that may require three-phase power

A: Three-phase electricity is the most common method of alternating current power generation,…

Q: State the condition for a three-phase system to be considered as a balance system.

A: The three phase voltages are not cophasal. they are mutually displaced by each other.

Q: What is the standard three phase a.c. supply we are getting in Sultanate of Oman from power…

A: In the Sultanate of Oman, the electrification rate is 98%. and the standard three-phase a.c supply…

Q: A 3-phase, 50 Hz, 110 KV, overhead transmission

A:

Q: is a convenient way of representing a three-phase balanced system.

A: a three-phase system is represented using the simple diagram for simplicity.

Q: 6.5 EDG Loading An EDG loads are: 20% Constant impedance. 70% constant kVA, 10% constant current…

A: Given: Z=20% 70% KVA 10% constant current Considering p.u. value considering the EDG is three phase…

Q: Why Generation Voltage Levels are low in the range of 11 kV/ 33 kV etc?

A: It is cheaper to produce at a lower voltage because insulation requirement at low voltage level is…

Q: Choose the correct options of three-phase supply compared to single-phase supply: I. Three-phase…

A: Compare with single phase and third phase system.

Q: -What are the reasons for using three phase system to generat and distribute electrical power.

A: In three-phase distribution, phase current is distributed in the phase of 120 degree due to which…

Q: ) Choose how to measure the R phase voltage in three phase star connected system?    a. Between…

A: Phase voltage is measured between one phase and neutral

Q: In a balanced two-phase voltage system, the different phase voltage is 120 Volts. What is the…

A: According to the question we have to find the value of line to line voltage with the help of given…

Q: a) High Voltages are preferred for Transmission of Electricity. Why? b) Why Generation Voltage…

A: a ) High voltage are preferred for transmission of electricity because transfer capacity increases…

Q: Main elements of Electric Power System except A. Electricity Generation B. Single Phase Transformer…

A: There are four components of complete power system, namy,  Generation Transmission Distribution…

Q: (b) What is the difference between a balanced load and an unbalanced load? Explain the power…

A: Balanced Load in a three phase system is a condition where all the three phases carry same magnitude…

Q: power supplied and power factor of the circuit.

A: When inductive load is applied to the circuit we get lagging power factor i.e., current lags…

Q: A three-phase 50 MVA 10 kV generator has a reactance of 0.2 pu per phase. Hence the per-unit value…

A:

Q: Equal area criterion is used for ______________ analysis of power system. a. Transient stability…

A:

Q: What is the per unit impedance of a 50 MVA, 13.8 kV, 1% impedance transformer if the base is change…

A:

Q: State two advantages of a three phase Ac supply over a single phase Ac supply

A: Single phase supply: The power is supplied through two wires called Phase and neutral and the…

Q: 1. It describe the relationship of current voltage and resistance.

A:

Q: What is a single and three phase power systems with resistive, inductive and capacitive loads?

A: Generally, we use two types of power supply in our application. It can be a single-phase power…

Q: Course: Electrical Engineering Subject: Electrical Apparatus Instructions: • Write the GIVEN with…

A:

Q: For transferring electrical power at 220 kV, six conductors of ACSR Drake constitute a 60Hz double…

A: Considering complexity of the solution, we are answering the first t0w subparts, please repost your…

Q: How to avoid errors in the Measurement of 3- Phase Power Using Two-Wattmeter Method.

A: Measurement devices are used to measure electrical quantities. The true value and the measured value…

Q: How to measure the B phase voltage in three phase star connected system? a. Between B phase and R…

A: Phase voltage is the voltage between any line wire and neutral wire, so here the phase voltage of B…

Q: hree-phase gas pressure cable (Draw, Identify and Mark all the parts)

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Q: Single phase Power delivered Per phase voltage

A:

Q: a- Explain why the start-up time of a power plant is important in power system operation. b- Explain…

A: As per the guidelines given, We can only provide the solution of the first three questions in…

Q: QUESTION-1) Three-phase systems in electrical circuits compared to multi- phase systems (6, 12-phase…

A: The reason why 3 phase power is preferred is because of the reason below, Consider a 3 phase line.…

Q: A 3-phase, 30 MVA, 10 kV alternator has internal reactance of 5 % and negligible resistance. Find…

A:

Q: What is the difference between a balanced load and an unbalanced load? Explain the power measurement…

A: Difference between Balanced and Unbalanced load:                A balanced load in a three-phase…

Q: Explain with an example and diagram of each, the following types of phase connection including…

A:

Q: Describe an unbalanced or asymmetrical of three-phase electrical system. i) State two (2) effects of…

A: The explanation is as follows.

Q: Household usually utilizes three-phase system.

A:

Q: B2 List any four advantages of three phase system.

A:

Q: In a 3-phase Overhead System, each line is suspended by a string of 3 Insulators. The voltage across…

A: Given voltage across top and middle units, using this we will find Ratio of capacitance, string…

Q: A generator is rated 100 MVA, 22 kV. Its Y connected windings have a reactance of 1.1 per unit. Find…

A: Per unit value is the ratio of actual value to the base value. Given:

Q: A three-phase system is said to be more economical than an equivalent single-phase two-phase system…

A: Mainly speaking about 3phase system, it initially requires huge cost but after construction, the…

Q: a. If two wattmeters are used to measure total power in a three-phase three-wire system does each…

A: Given question is related to measurement of power in a circuit

Q: What is the alternators terminal phase voltage at shorted load condition? Explain and justify your…

A: Alternator: Alternator converts mechanical energy into electrical energy. Types of alternators:…

Q: Benefits of 3 phase system over 1 phase system

A: Benefits of 3 phase system over 1 phase system

Q: What are two main types of three-phase connections

A: Two main types of three-phase connections are : Star connection Delta connection In star…

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.