16. Three single phase step up transformers rated at 40 MVA, 13.2 kV/80 kV are connected in delta-wye on a 13.2 kV transmission line. If they feed a 90 MVA load, the secondary line voltage is a. 80 kv b. 13.2 kV ww C. 139 kV d. 22.83 kV

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A: One line diagram of a three phase system  From circuit

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A: Per unit

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A:

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A:

Q: H.W A 25 MVA, 13.8 KV synchronous generator with subtransient- reactance of 15% motors 10 MVA, 6.9…

A:

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A: In this question we need to find a load current of the given system.

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A: Given, The single line diagram is shown below, Where,Feeder impedance, ZF=0.003+j0.015 Ω/phaseLine…

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A:

Q: (a) The base impedance in (N) (b) The reactive power drawn by the load (p.u.) (c) The total current…

A:

Q: The impedance per phase of 3-phase transmission line on a base of 100 MVA, 100 kV is 2 pu. Find the…

A: Given- 3-phase transmission line- MVAnew=400,MVAold=100,kVold=100,kVnew=400,Zold (pu). To Find- The…

Q: the figure below to supply a balanced 3-phase, 150 KVA, 600 VLL load from primary 4.16 KVLL line.…

A: Please find your answer below in step 2

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Q: In the system shown in Figure 1, the transformers are connected star-star with both star points…

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A: Given  A true or false question based on single phasing condition. Please find the answer below.

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A: The explanation is as follows.

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A:

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A:

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A:

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Q: 6. 150 kVA, 2800-240 V, 50 Hz transformer. Reg.Ls = 0.0082N , Xeq.Ls = 0.02230 Step down transformer…

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A:

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Q: ) Consider a 3-phase, 33 kV transformers with N1:N2 = 900:150. Calculate the secondary line voltage…

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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.