If the per unit reactance of a power system up to the fault point is 0.1pu and base power (VA 10 MVA, then the fault level (VAsc) is 100 MVA 2 MVA O 50 MVA

Q: The calculated the differential gap percentage if a fault temperature control range is 63° and…

A: Given data are: The fault temperature control range is 63° The differential gap is 8°

Q: Which section of the National Electrical Code provides the performance requirements and criteria for…

A: Given To identify the national electric code that provides performance requirements and criteria for…

Q: Function of circuit breaker!

A: A mechanical device called a circuit breaker is made to shut or open contact members, which closes…

Q: QUESTION-3: In the system with open and closed protection zones given in the figure below: a) Which…

A: Primary protection system: It is the protection system installed in power system which operates as…

Q: All of these are common branch circuit problems except A) undersized wire. B) damaged wires. C) open…

A:

Q: If the per unit reactance of a power system up to the fault point is 0.2pu and base power (VA,) is…

A: Given, Per unity reactance= 0.2 puBase power= 10 MVA

Q: Q3. i) Identify the type of the fault can happen for the situation below. "when a mechanical…

A: Part (i):- When a mechanical excavator cuts quickly through a whole 3- phase overhead line the type…

Q: The cause of electric power system faults is __________________

A: Electric power system fault: A fault or fault current is any abnormal electric current in the…

Q: the fault current for a

A: Types of open circuit fault- 1) Symmetrical fault- Three phase line to ground fault  Three phase…

Q: Draw the schematic diagram of a double line to ground fault and basic equipment of a substation.

A: A double line to ground fault is also known as a phase to phase to ground fault, in this type of…

Q: In a string of suspension insulator with three units,the line unit has 15kV and k=0.15. The voltage…

A:

Q: GFCIS protect against ground faults and AFCIS protect against Check all that apply. electrical fires…

A: GFCI and AFCI are protecting circuits used in electrical installation.

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: Write any four typical examples of a transient fault.

A: In this we will write about transient fault typical examples...

Q: Bus bar system in which fault in one area doesn't affect another area is O duplicate bus bar O…

A: system divides the busbar into sections and the protection is also done separately.

Q: The positive sequence current is Times the current in neutral wire

A: A balanced three-phase system with the same phase sequence as the original sequence is called as the…

Q: What are different types of fault in electrical power system

A: The fault in the power system is expressed as the any unwanted or abnormal condition of the system…

Q: If a circuit is capable of delivering 22,000 amperes of fault current, what is the minimum short…

A:

Q: 5. The Metallic Shield provides a path for Fault and Leakage Currents. Select one: True False

A: Given  The Metallic Shield provides a path for Fault and Leakage Currents.

Q: In a string of suspension insulator with three units, the line unit has 20kV and k=0.35. The voltage…

A: Given: Voltage across line unit, V3=20 kVk=0.35

Q: What are the effects of faults on power * ?device

A: Since there are multiple questions present, according to company policy we will be answering only…

Q: 15.For rangers of 8.75 kW or more in rating, the minimum branch circuit rating shall be:

A: Minimum  branch current rating should be 40 amperes (A) for the rangers which has 8.75 KW rating or…

Q: what is the simplest and cheapest method to find a fault using the DC resistivity method?…

A: DC resistivity method is used to detection of fault by creating and distribution of an electrical…

Q: (f) Write down the readings for each of the test meters taking care to include their units.

A: The digital multimeter can be used to measure the voltage, current and resistance. Based on the knob…

Q: This is done to ensure that no potential difference can appear between any of exposed metal parts of…

A: Bonding : the connection of two conductor to form Equipotential between them is called bonding .

Q: why does the fault current vary between a minimum and a maximum at any location?

A: Given: Fault current

Q: 24. Which of the following is not one of the technical reasons for grounding the starpoint ? a)…

A: According to question:  For  Limiting inductive interference between power and communication…

Q: If the per unit reactance of a power system up to the fault point is 0.1pu and base power (VAb) is…

A: Dear student as per guidelines we are allowed to solve one question at a time  I request you to post…

Q: List the cause of fault in different equipment in a single system

A: A fault happens when a conductor's insulation fails at one or more points, or when a conducting item…

Q: Electrical hazards include electrical arcs, blasts, and broken or faulty equipment. a. Polished O b.…

A: The correct option is shock.

Q: A fault exists in a three-phase system is depend on the insulation level of the rated cable. Analyse…

A: Given A fault exists in a three-phase system is depend on the insulation level of the rated cable.…

Q: Which of the following protective device unable to interrupt the fault current. O a. Fuse O b.…

A: Fuse :- It is a protective device and it is operated to provide overcurrent protection. When fault…

Q: explain outdoor substation

A: Outdoor substations: Outdoor substations are substations that handle all voltage ranges from 55 KV…

Q: And interrupting rating is a/an_____rating, which is a measure of the fuses or circuit breakers…

A: Fuses are used to protect equipments during fault conditions.

Q: Q.3. Give two reasons for overloading and two reasons for short circuit and two precautions to…

A: Two reasons for Overloading: When, the live and neutral wires come in direct contact with each…

Q: How the load factor is affected by the block meter rate structure or tariff

A: Load factor is define as the ratio of an average to a maximum load. load meant by the kilo-watt…

Q: With the aid of necessary diagrams, briefly explain the difference between symmetrical and…

A:

Q: Severity of fault is expressed in terms of Magnitude of Recovery Types of fault All of these the…

A: If the magnitude of the fault current is high then this current is more severe as compared to the…

Q: technician A says a hybrid vehicle uses two different power sources. Technician B says a hybrid…

A: Technician A is definitely correct because hybrid vehicles itself describe that they rely on two…

Q: During faulty condition, high short circuit current

A: Due to No separation of primary and secondary windings hencw hysteresis doesn't apply.

Q: The voltage drop is as we proceed from the supply end to the consumer points

A: We know that the voltage at supply and will be maximum and as we go towards the consumer point it…

Q: why the voltages are in multiple of 11 ?

A:

Q: Explain the electrical scenarios briefly 1. No Ground Fault circuit interrupter 2. No Residual…

A: Ground fault circuit interrupter - Ground fault circuit interrupter also known as  GFCI inspect  the…

Q: b) The general function of the circuit breaker (CB) is to close and open the circuit to be able to…

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

Q: State and explain 5 principles of finding fault

A: to State and explain 5 principles of finding fault

Q: What would be the ground fault/ short circuit protection using an inverse time circuit breaker for…

A: Given: 240 V 5 hp motor with 75 degree Celsius temperature.

Q: Derive and discuss mathematical relation for the max value of RRRV. Briefly explain why a percentage…

A: Introduction: The rate of increase in re-striking voltage is abbreviated as R.R.R.V. and is…

Q: 4 Difference between circuit breaker and fuse...

A: Circuit Breaker Definition: A Circuit Breaker is a switching device which also offer protection…

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.