Under Unbalanced Condition With Faults: d. The Fault Current (I)

Q: 5.26 An unloaded generator with a pre-fault voltage 1 pu has the following sequence impedance: Z, =…

A: Given, An unloaded generator with pre-fault voltage, E = 1 pu Zero sequence impedance, Zo=j0.15 pu…

Q: Chances of fault occurrence are rare in underground cables.

A: True

Q: QUESTION 7 The % age reactance of the system up to the fault point is 17% and the base MVA is 59.…

A: Given: % reactance of the system upto the fault, Xeq=17%=0.17 Base MVA is 59.

Q: For the following single line diagram of a three-phase system, a three-phase fault occurs at point P…

A: Given data : G1 = 20mvA     = 6.9kv which  is taken as base value Xg1 = 0.15  pXg2 at new Base =…

Q: Single line to ground fault is one type of the symmetrical fault. Select one: O True O False

A:

Q: The system values  are given below.  The bus 1 voltage after fault  = 1.5 p.u  The bus 2 voltage…

A: The bus 1 voltage after fault = 1.5 p.u  The bus 2 voltage after fault = 1.2 p.u The line admittance…

Q: 2) The following circuit has a problem. Switch #1 is able to control lamp #1, but lamp #2 never…

A: Given: Lamp 1 in series with switch 1 and Lamp 2 with in series with switch 2.

Q: In a power system with negligible resistance, the fault current at a point is 8.00 pu. The series…

A: Given- Fault current If=8 pu, Short circuit current Is=5 pu, To Find- The value of the series…

Q: Fault currents are in quadrature with load currents when O a. resistance of the lines are neglected…

A: Resistance- Resistance in electrical system is a characteristics of material which resists electric…

Q: If all the sequence voltages at the fault point in a power system are equal, then the fault is a…

A: When all the sequence voltages at the fault point in a power system are equal, then the fault is a…

Q: Q the following Sequence curent were recorded under an un balanced fault condition La =-J1.653 p.u…

A: The solution is given below

Q: Load sets are connected in series or in parallel but fuse must be always connected in a)series…

A: ANSWER:- OPTION.A

Q: A 3-D power system experienced an unbalanced fault type had the following sequence voltages at the…

A: In this question we need to find the following Calculate the related phase components Identify the…

Q: Q.3 When a line-to-ground fault occurs, the current in faulted phase 'a' is 100A. The zero-sequence…

A: Given- Line to ground fault- Current in the faulted phase=100 A, To Find- The zero-sequence current.

Q: 11 A 25 MVA, 11 kV, 3-phase alternator has x d = 0.25 pu, Z₂ = 0.3 pu and Zo = 0.2 pu. It's neutral…

A:

Q: In case of permanent fault, for the coordination of protective devices the following data is…

A: all of the above .

Q: positive, negative, and zero sequence reactances of 0.25 pu, 0.15 pu, and 0.05 pu, respectively. The…

A: The expression for single line to ground fault current is given as:

Q: Please answer. Thank you! Discuss the fault analysis in series-parallel circuits.

A: Fault analysis in a series paralleled circuits is an important aspect of electrical engineering and…

Q: In which type of fault diagnosis the fault can be identified by visual inspections of any loose…

A: In this question we are going to study about the different techniques of finding the faults in a…

Q: In which portion of the transmission system is the occurrence of faults more common a alternator B…

A: Answer:C transmission line

Q: 3-phase fault is the severe fault among all other faults True False

A: Choose the correct option Is it true or false The given Statment "3 phase fault is severe fault…

Q: ence components of the fault current are as Ipositive 12 p.u., Inegative and Izero The type of fault…

A: SOLVE ABOVE QUES

Q: In which of the following faults symmetrical component method is not required O a. Line to line…

A:

Q: 11. For the single line diagram shown below, using base power of 20 MVA. i. Determine the fault…

A: As per BARTLEBY GUIDELINES , I have to answer only one question . So I answered Q-(11) and repost…

Q: A fault which gives rise to symmetrical fault currents (equal faults currents with 120-degree…

A: Symmetrical fault: When three phase lines are balanced, when ever a fault occurs  betwe these lines…

Q: 1- Complete the table below No Type of Fault Operation of Relay 1 Phase to Ground fault (Earth…

A: For phase to ground fault : A current-based ground-fault relay may look for ground-fault current in…

Q: Q7. For the bolted fault of solid fault the fault impedance is equal to 01 OHigh OLow

A: For the bolted fault of solid fault, the fault impedance is equal to Zero.

Q: The one line diagram of the system and data: Gl and G2:reactance-D0.2 p.u,11kv, 100MVA T1 and T2:…

A: Fault Analysis- Transmission lines are represented using series reactance. So, the series resistance…

Q: The arcing voltage has the low value except for the period the fault current is at or near to…

A: the arcing voltage is the voltage that appears across the contact during the arcing.

Q: The distribution feeder is mainly protected from the lighting, by using the process of shielding…

A: A lightning arrester is a device that protects the insulation and conductors of an electric power…

Q: 3. For the network shown below, a balanced fault occurred at motor (M) terminal. Calculate the fault…

A:

Q: In a power system 2 % of the total occurred fault is symmetrical fault. This will be most severe due…

A: Solution The symmetrical fault is most severe in high voltage and high current.

Q: In a distribution system, the transient faults occurs in Both OH distribution system…

A: Choose the correct option   In a distribution system, the transient faults occurs in?

Q: Single line to ground fault is one type of the symmetrical fault. Select one: True False

A: Need to find true false

Q: In transformer, is defined as the change in the A7 secondary terminal voltage from no-load to…

A: in transformer, ..... is defined as the change in secondary terminal voltage from no load to full…

Q: - For the following circuit: a) Find the total number of stuck-at-0 and stuck-at-1 faults. Show your…

A: The answer as given below:

Q: .The most severe fault in the power system is three phase fault . Select one?: O True O False

A: Given  The most severe fault in the power system is three phase fault . Select one O True O False

Q: As the distance from the fault location increase the current decrease. Select one: True О False

A: Several factors affect the highest available fault current in an electrical system. This includes:…

Q: The sequence components of the fault Izero -j1pu. The type of fault in the system is current are as…

A: In this question we need to identify the type of fault

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.