4. A single-line diagram of a three-phase balanced system is given below. A bolted three- phase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate the rated interrupting current rating of circuit breaker A, D and E, both in per unit and Ampere value.

4. A single-line diagram of a three-phase balanced system is given below. A bolted three- phase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate the rated interrupting current rating of circuit breaker A, D and E, both in per unit and Ampere value.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.49P: Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings...

See similar textbooks

Related questions

Q: Consider an experimental 2000 kV three phase bundle-conductor line with 16-sub-conductors to each…

A: (c) Given Inductance in H per meter per phase is 0.744X10-6. Capacitance in Farads per meter per…

Q: In the case of a three-phase symmetrical short circuit fault at the F1 point in the power system…

Q: In a short paragraph, explain the need to use bundled phase conductors in HV, EHV, and UHV 3-phase…

A: Bundled conductors are made up of two or more stranded conductors that have been bundled together to…

Q: Consider the one-line diagram of power system shown below; a) Develop equivalent circuit expressing…

Q: The one-line diagram of a three-phase power system is shown in the above figure. The line impedances…

A: Given One line diagram of a three phase system

Q: the block diagram for three phase transmission line system

A: Here we discuss about single line diagram of 3 phase transmission line. First one must understand…

Q: Figure 8.26 shows a single-line diagram of a three-phase, interconnected generator- reactor system,…

Q: Under Unbalanced Condition With Faults: a. Load Line Currents (la, Ip,!c); b. Load Line Voltages…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: A single-line diagram of a three-phase balanced system is given below. A bolted three- phase short…

Q: 1.2 For each set of voltages, state whether or not the mCE voltages form a balanced three-phase set.…

A: The explanation is as folows.

Q: 3) Draw the schematics of a HVDC and of a HVDC light, compare the systems evidencing advantages and…

A: HVDC means high voltage direct current is a method of electrical power transmission which uses…

Q: In case of unbalanced 3-Φ, 4-wire system % voltage drop is… not possible to estimate same as in…

A: it should estimate for each phase .

Q: A single-line diagram of a three-phase balanced system is given below. All the motors are rated with…

Q: 3. A three-phase, three wire, CBA system with an a line voltage of 150 Volt, has three impedances of…

Q: (Q.3) Derive the expression of fault current for single line to ground fault occurring at phase 'a'…

A: L-G Fault: L-G fault refers to Line-ground fault. It is an unbalanced Fault. Whenever there is a…

Q: Calculate the zero, positive, and negative sequence current of phase "a" for the following phase…

Q: A single-line diagram of a three-phase balanced system is given below. A bolted threephase short…

A: Given : VHg=21kv taking 22000kvA Base or we can say 22mvAM1 side= 11 kv M2 side =733 kvThevenin;s…

Q: For grounded systems, the _ for the service and the system bonding jumper for separately derived…

A: The equipment grounding conductor connections at the source of separately derived systems are done…

Q: 5.20 Three individual 3-phase 400 kV power system, each one of which consists of a generator…

A: we need to explain about fault level if extra lines connected.

Q: Draw an impedance diagram for the electric power system shown in Figure 3 showing all impedances in…

A: The equivalent circuit of a power system is the impedance diagram, in which the various components…

Q: 2_ What case/cases in which the measured phase current include the three symmetrical components (…

Q: In the case of a three-phase symmetrical short circuit fault at the F1 point in the power system…

Q: 2) For a given short-circuit calculation utilizing the per unit method, a base voltage of 480 V and…

A: Given, Base voltage, Vb=480 V Base power, Sb=2500 kVA

Q: (b) Explain the steps involved in analysing balanced bolted fault in power system using Zbus method,…

A: Admittance matrix and impedence matrix is very important to analyze the power system .Admittance…

Q: distribution engineer has determined 14.01% voltage unbalance for a 240 volts system whose three…

A: Here voltage is 240V and unbalance is 14.01% find it as below

Q: 10.10 A 3-phase 33 kV, 37.5 MVA alternator is connected to a 33 kV overhead line which develops…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Figure 1 shows the schematic diagram of a three phase radial transmission system. The ratings and…

A: Circuit Configuration, we have :

Q: In a 3 phase, 3 wire system, it has normal voltage of 10.4kV line to line fault occurs at generator…

A: For the 3- phase line to line the positive sequence phase current is evaluated as:

Q: What is the negative sequence component

Q: a short three phase transmission line with the importance of 5 + jade 20 into ohm per face has…

A: Assuming the power factor to be 0.8 lagging because it seems that there is a typo while mentioning…

Q: Figure 3 shows the one-line diagram of a three-bus power system with generation at bus X. The…

Q: Under Unbalanced Condition With Faults: b. Load Line Voltages (Vab, Vpc, Vca);

A: Under unbalanced condition with fault, We have to find load voltages fault type is not mentioned,…

Q: The reactance information of the power network is shown in the figure, in units of common base. The…

Q: From the system as shown below with base of 100 MVA by neglecting all parallel admittance. (a)…

A: Since there is two bus in the system, so Size of Ybus matrix will be 2×2.…

Q: what is the Analysis of 3 Phase star connected circuit? please write introduction

A: Power systems include source and load at sending and receiving respectively. Three-phase sources and…

Q: The one-line diagram of a 6-bus power system is shown below with per unit impedances on common base.…

Q: Figure Q1 shows a single-line diagram of an 8-bus system. Line-1 and Line-2 have reactance 10 Q and…

A: lOAD -1 Values are-10 ohm,35 MVA,11KV lOAD -2 Values are-15 ohm,15 MVA,11KV For converting the…

Q: Apply the knowledge of per unit system on above network and draw an impedance diagram showing all…

A: For the given data impedance diagram is drawn as shown below

Q: 2- The Purpose of using Unbalanced Three-phase Systems:

A: The purpose of using unbalanced three phase system is

Q: 5) Non minimum phase systems are also non causal. True False

A: Non-minimum Phase system: They are causal and stable systems whose inverse are causal but unstable.…

Q: What is the surge impedance loading of a loss less 400 kV, 3-phase, 50 Hz overhead line of average…

A: Given, a overhead line having Voltage rating, VL= 400 kV Surge Impedance, Zo= 400 ohms

Q: Calculate the limit of TL length at the full-load for three-phase, 450 MVA, 400 kV, 50 Hz, 400 mm²…

A: Given data, The diameter of the overhead line is 6.93. Overhead line = 400mm2 Voltage of overhead…

Q: 1. A delta connected load with impedance 20cis0- ohms per phase is supplied from a 220 volts, 60…

Q: Describe the effect of resistive load on sending and receiving end voltages, Power transferred and…

A: Effect of resistive load on sending and receiving end voltages, power transferred and Power factor.…

Q: The % voltage drop is calculated for 3-phase systems by taking phase quantities and per phase line…

A: Percentage voltages drop is calculated for both per phase quantities as well as three phase…

Q: Athree-phase, wye-connected, 6.25 kVA, 220 V synchronous generatorhas a reactance of 8.4 N perphase.…

A: The given system is a three-phase Y connected, the base values are as follows: Vbase=220…

Q: Q2 A three-phase power system is shown in Figure Q2. The data for this system is given in Table Q2.…

A: The given three-phase power system is shown below,

Q: In a 3-phase, 4 wire unbalanced system, the current in neutral wire is 18 A. The magnitude of zero…

A: Given a 3-phase, 4 wire unbalanced system having, The current in neutral wire, IN=18 A

Q: Due to the enlarging of served area, it is decided to change the line to line primary voltage.…

A: option (b)

Q: A three-phase, 50 Hz, 800-kV tranmission line

A: Since you have asked too many questions, I will answer part a, you can ask the other question in a…

Concept explainers

Single Phase AC Circuit

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.

Question

4. A single-line diagram of a three-phase balanced system is given below. A bolted three-
phase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate
the rated interrupting current rating of circuit breaker A, D and E, both in per unit and
Ampere value.
Ic,!0% D
8000KVA
M) 9 KV
20%.
12%
22/11KY
22,000 KVA
Gen
11/22 KX
6000KVA
Mz)
6KY
15%
11 KV
22,000 KVA
22,000
KVA
22/7.33K
15%
22,000 KVA
14%
[
Al tue given
impedances are su btranslent value

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Analysis of Single Phase and Three Phase System

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.

Similar questions

1. How do you measure three phase line currents by using two current transformers? Draw the connection scheme.
Problem 1 - Series en Parallel AC networks [19] Look at the circuit in Figure 1 and determine the following: (a) Total Admittance. (b) Total Impedance. (c) Total Current (l:). (d) Current (I1) through impedance Z2. (e) Current (12) through impedance Z3. (f) Current (I3) through impedance Z4. (g) Is this an inductive or capacitive circuit? A. B Zs 220V;50HZ Figure 1 (h) Voltage across Z1. (i) Voltage across A and B. G) Voltage across Zs. Z1 = 3 + j5 ohm Z2 = 10 + jo ohm Z3 = 5 + j15 ohm Z4 = 10 – j30 ohm Zs = 20 – j30 ohm Admittance and Impedance in rectangular notation. All currents and voltage in polar notation. Take voltage as reference.
Determine the short-circuit current ISC3,0.4kV for a 3-phase short- circuit fault at F. Give your answer up to 2 decimal in kA but do not enter the unit in your answer. Transformer T1 Transformer T2 Cable C1 Isc3,6.6kV Isc3.0.4kV O + j0.150 F 1 MVA 2 MVA 22/6.6kV 25 MVA fault level 6.6 kV/400V Z=3% 6.6 kV switchboard 400 V switchboard
13. _______ current attempts to return to the source over any available conductive path.A. DirectB. AlternatingC. Ground-faultD. Arc-fault
At a certain point of the system network the positive, negative and zero sequence impedances are 0.25, 0.25, 0.3 p.u. respectively. The base MVA is 100. The voltage level at that point is 34.5 kV. Determine the fault current for a line to ground fault. A 6275 A B. 8132 A C. 7516 A D. 2091 A
b) A fault occurs at bus 2 of the network shown in Figure Q3. Pre-fault nodal voltages throughout the network are of 1 p.u. and the impedance of the electric arc is neglected. Sequence impedance parameters of the generator, transmission lines, and transformer are given in Figure Q3, where X and Y are the last two digits of your student number. JX20 /0.1X p.u. jXa2) 0.1X p.u. JX20 j0.2Y p.u. V,= 120° p.u. V, 120° p.u. V, 120° p.u. jX4-70.2X p.u. jX2 j0.2X p.u. jX o 0.2Y p.u. jXncay J0.25 p.u. jXna J0.25 p.u. 3 jXno0.3 p.u. jXTu) /0.2Y p.u. jXra j0.2Y p.u. - j0.2Y p.u. Xp-10.1X p.u. jXa j0.1X p.u. jXp0)- j0.05 p.u. 0 Figure Q3. Circuit for problem 3b). For example, if your student number is c1700123, then: jXac1) = j0.22 p.u., jXac2) = j0.22 p.u., and jXaco) = j0.23 p. u. X-2 Y=8 (iv) Determine the short-circuit fault current for the case when a phase-to- phase fault occurs at bus 2.
For the circuit shown, if a symmetrical three-phase fault occurs in node 2, determinea. The short-circuit current in all three phases. b. The voltage at node 1 during the fault.c. The current in generator 1 during the fault. Neglect the prefault currents and consider the reference voltage of the system at 10√3 ??.
7. System Model and Per Unit T1 Line T2 BE 31.25miles 3 Impedance Load R1+jXL-0.1+j0.5 p.u. 30 MVA 30 MVA 13 kV X-0.1 p.u. 14 kV 13/220 kV X-0.2 p.u. 35 MVA * Transformer T2 is composed of "three single-phase" transformers, each rated 40/3 MVA, 132.8:14 kV with a leakage reactance of 0.1 per unit. (a) Fill in the appropriate base values. Gen. G Trans. Ti Line Trans. T: Load New MVA Base New KV Base (b) Calculate the impedance values. Gen G Trans. T1 Line Trans. T2 Load p.u. Impedance
Determine the positive- and negative-sequence phase shifts for the three- phase transformers shown in Figure 3.36.
Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings given: Generator G1: 50MVA,13.2kV,x=0.15p.u. Generator G2: 20MVA,13.8kV,x=0.15p.u. Three-phase -Y transformer T1: 80MVA,13.2/165YkV,X=0.1p.u. Three-phase Y- transformer T2: 40MVA,165Y/13.8kV,X=0.1p.u. Load: 40MVA,0.8PFlagging,operatingat150kV Choose a base of 100 MVA for the system and 132-kV base in the transmission-line circuit. Let the load be modeled as a parallel combination of resistance and inductance. Neglect transformer phase shifts. Draw a per-phase equivalent circuit of the system showing all impedances in per unit.
Three single-phase two-winding transformers, each rated 3kVA,220/110volts,60Hz, with a 0.10 per-unit leakage reactance, are connected as a three-phase extended autotransformer bank, as shown in Figure 3.36(c). The low-voltage winding has a 110 volt rating. (a) Draw the positive-sequence phasor diagram and show that the high-voltage winding has a 479.5 volt rating. (b) A three-phase load connected to the low-voltage terminals absorbs 6 kW at 110 volts and at 0.8 power factor lagging. Draw the per-unit impedance diagram and calculate the voltage and current at the high-voltage terminals. Assume positive-sequence operation.
Consider the three single-phase two-winding transformers shown in Figure 3.37. The high-voltage windings are connected in Y. (a) For the low-voltage side, connect the windings in , place the polarity marks, and label the terminals a, b, and c in accordance with the American standard. (b) Relabel the terminals a, b, and c such that VAN is 90 out of phase with Va for positive sequence.