Constants The source in the circuit in (Figure 1) is inadvertently short-circuited at its terminals a, b, as shown in (Figure 2). At the time the fault occurs, the circuit has been in operation for a long time. Suppose that v=225 V Figure 50 a m 350 392 312.5 mH 33.75 mH 1 of 2 > ▼ ▼ Part A What is the initial value of the current ab in the short-circuit connection between terminals a, b? Express your answer to three significant figures and include the appropriate units. View Available Hint(s) Submit Part B Submit ▼ Part C 1º4 PA t= Value What is the final value of the current i ab? Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) μA Value Units 4 =) ? Units ? How many microseconds after the short circuit has occurred is the current in the short equal to 19 A? Express your answer in microseconds to three significant figures. ▸ View Available Hint(s) 1971 ΑΣΦ | 11 Ivec 3 → O ? us

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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.