OWER SYSTEM ANALYS The following currents were recorded under fault conditions in a three-phase system -150245 A I-250150 A le -1002300 A Spark The angle of the negative phase sequence component , in electrical degrees is Select one OA 40 45 OB 160 45 OC 79.55 D. 40 45

Q: What is the difference between single-phase and three-phase alternating current? Select one: A.…

A: Single-phase supply consists of the two power legs - Phase and Neutral  Three-phase supply consist…

Q: If the waveform has positive phase angle then its shifted to the left Select one: True False

A: Phase angle is defined as the angular displacement of waveform from the refrence point. In most of…

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

A: Number of cycles = 5 Time = 8ms

Q: How would you ensure that the load impedance of the output circuit is properly matched to the…

A: Pulse Generator:

Q: Write the equation, starting at A and going clockwise for the KVL loop

A: Consider the given circuit,

Q: 3-phase-demos-3vi File Edit View Project Operate Tools Window Help Waveform Chart 8 21 2- 18- 16-…

A: Step 1: When all the diodes were connected, each diode is responsible for 3 pulses of 120 degree in…

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

A:

Q: 3-phase-demos-3vi File Edit View Project Operate Tools Window Help Waveform Chart 8 21 2- 18- 16-…

A: Step 1: When all the diodes were connected, each diode is responsible for 3 pulses of 120 degree in…

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.